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SEA - LHR

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Round-trip
Economy
Seattle (SEA)
London Heathrow
Fri. 18/6
Fri. 25/6
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Top 5 airlines serving Seattle/Tacoma Intl to London Heathrow

Scores according to KAYAK customer reviews

8.1
JetBlue
Overall score based on 19,575 reviews
8.3
Boarding
8.2
Comfort
8.6
Crew
7.9
Entertainment
7.8
Food
Airline reviews

Cons: "The flight was SIX hours late, yet passengers were told to check in at the original time. Why? Just to spend the whole freaking night at the airport? The reason for the delay was supposedly weather, yet flights from SEA to BOS on other airlines were on time. Staff were not helpful or empathetic."

Cons: "Boarding was chaotic. Food fees should be included into ticket price ("free"). Food quality should also be improved."

Cons: "Too hot. They need to turn off the blue light for a red eye..."

Cons: "The delay !!"

Pros: "Jet Blue always has great Flight Attendants, comfortable seats and in flight TV"
Cons: "N/A"

Pros: "The gate process to boarding was excellent"
Cons: "There was broken TVs no running water so no hot beverages no bathrooms on a 2 hour flight and I’m pregnant so that was u comfortable and the flight attendants were not very accommodating or helpful in fact almost boarder line rude if they say something mean but use a nice voice that doesn’t make it acceptable"

Pros: "It was great and easy."

Cons: "Pets were allowed on the flight, and we had no prior knowledge of this. I happened to be allergic to furry animals, especially cats and dogs. There were two dogs on board, one in a row toward the front and one in the back. There was nowhere that I could go and allergens were probably circulated in the system. There was also a terrible odor that several others said they could also smell. The attendant said that there was nothing that could be done, and we suffered through the entire flight. Also, the TV control was broken and there was no option to turn off the TV. The attendant said that there would be a $25 voucher issued for compensation. We have not heard a peep from anyone!"

Pros: "Seating is comfortable!staff,helpful"
Cons: "Delay...was not made up in flight..."

Pros: "We got in ahead of schedule."
Cons: "The staff seemed tired and overworked. I got hit in the head by a flight attendant with the snack tray. An accident but still. Once we landed and we’re at the gate it took almost 40 min to get off the plane. That was ridiculous. Then after the long walk to baggage, luggage was still not there. Again we waited. Too much waiting after a long flight. I fly to NYC all the time and I’m usually in the city one hour after I land and it took 2 hours 15 min to get to Queens. Usually I have great flights with JetBlue. Last night was not the case. You get a C."

Cons: "Snack options"

Cons: "Got to airport an hour ahead, and then hit an unreal TSA wall. It's freaking heartbreaking the way we've all embraced ridiculous Security Theater (oh, yeah, sure--take off my shoes? Of course.) and that airports don't spend the moments it would take implement a protocol to systematically shepherd passengers through *appropriate* levels of screening based on variables such as departure times and past record. Aw, but that'd be too complicated. So screw us, one and all."

Cons: "Seat was not comfortable. Something was wrong with the cushion."

Pros: "I loved how new the plane was. It felt modern unlike nearly every other plane I’ve been on. Complimentary eye mask and ear plugs are a fantastic touch. Great crew. Kyayak app made it very easy"
Cons: "Paid $80 for preferred seating. Got leg room, but no tv and you can’t have any carry on bags on the floor, only in overhead."

Pros: "promptness, friendly service"

Pros: "Great flight crew."

Cons: "Elva"

Pros: "I appreciated dual boarding at Long Beach airport through the front and rear doors of the plane, making the process much quicker."
Cons: "Headphones were not complimentary, and entertainment system was somewhat outdated."

Pros: "Most everything was great."
Cons: "Ended up sitting in the very back row, so wasn't able to lean back as far. Otherwise it was fine."

Cons: "Checking in was difficult for me. My husband was able to check in through the cruise line. when we got to the airport the counter was not open. i checked in but did not get a seat assignment. When we got to the gate our flight to Boston was delayed until 3am from midnight. I tried getting a seat assignment but was told I had to wait until all the other flights were taken care of. I finally got my seat with my husband after 10p. I am a very nervous flyer so this was very nerve racking for me. But once I got my seat I calmed down. We always fly Jet Blue when we can. The flight itself was wonderful. And the counter folks were very patient with the customers dealing with delays."

Pros: "Spacious legroom! Complimentary soft drink, coffee"
Cons: "30 min late departure"

Pros: "Even though our flight was 100% full, the staff went out of there way to make it a pleasant flight."
Cons: "We waited a little longer for our baggage to arrive but things happen and we did leave with our bags, that’s the main goal. Thanks Jet Blue"

Pros: "Once on board everything went well. Full can of soda pop is always nice. Such a small thing yet it is appreciated and noticed."
Cons: "Not the fault of the crew, couple hours late."

Pros: "No food; so no rating.no food was fine on red eye flight, less disturbance, more quiet time"

Cons: "We were delayed for 3hours."

Pros: "Nothing particularly"
Cons: "My seat"

Pros: "They were prompt and friendly!"

Pros: "Seems like slightly more leg room on this flight than some of the competitors"
Cons: "TV system was broken on our flight (which was long, SEA-BOS), and there was only one chance to have a snack (which I missed)."

Pros: "Plane arrived on time and the staff was really friendly"

Pros: "The boarding process went so smoothly."
Cons: "One flight attendant, a tall gal with brown hair, talked so loudly to her crew mate through out the flight that we could hear her over our ear buds. She made sleep impossible until the last 45 mins of the trip."

Pros: "Good leg room; free movies were great!"
Cons: "Can’t think of anything!"

Pros: "Everyone was cheerful, efficient and nice"
Cons: "Airplanes are uncomfortable, not just yours"

Cons: "Delayed departing SeaTac due to broken bin, so sat at gate over a half an hour. As a result missed rental car pick up time in Long Beach on a holiday weekend. Had to rent from another higher cost rental car firm as was a “walk up rate renter”. Spent an hour getting the last rental car which of course reeked of pot smoke smell, and was a compact."

Cons: "The evening flight will give you earplugs and eye patches. Very sweet。"

Cons: "Relaxing flight"

Cons: "crew very unfriemdly"

Cons: "no power outlets"

Pros: "The crew seemed capable and came around a couple times with water. We arrived safe and sound as one would hope for, if an hour or so later than scheduled. Seats seemed roomier than most standard economy/coach (probably due to it being an older model). Though I didn’t partake they seemed to offer more complimentary snack options than other airlines."
Cons: "The airplane cabin had a strong urine odor that endured throughout the red-eye flight, the air temperature had to have been at least 75 degrees, probably 80 which was a bit stifling. No usb/power at the seat which would be preferable/should be standard by now for a coast-to-coast flight. Seat didn’t recline which isn’t the end of the world but a bit of a bummer. My headphones didn’t work with the little screen at my seat but it’s ok because based on my neighbor’s screen it was just a rotating lineup of Jet Blue commercials/fake tv shows that I can easily pass on."

Pros: "We were compensated for almost the entire value of our ticket , which was really nice. The snacks are the best. You can watch live tv. The captains worked extra hours to get us to our destination."
Cons: "Our flight was delayed 4 hours due to lack of de-icer. They were short crew and fluids. We would get delay notices on our phones, but Jetblue wasn't announcing them. They announced only some."

Pros: "Great stewards and stewardesses, clean, comfortable leg room"
Cons: "Seat doesn't go back much. Movie selection not great."

Pros: "Attendants were friendly and customer service focused the entire flight. Good leg room for a 6 foot one inch male."
Cons: "Seats a little firm."

Pros: "Crew was very nice"

Pros: "Great crew, entertainment choices and smooth flight."

Pros: "The woman at the check in desk was great in helping me to find a decent seat."
Cons: "Your web system did not allow me to choose a seat and wasted a lot of my time. Blue chips are now mixed with sweet potato, ruining the experience."

Pros: "Everything went super smooth, with fantastic service on the flight!"

Pros: "Low fares. On time departures and arrivals."
Cons: "Americans today travel with hand luggage and duffels which should be in the hold as ticketed baggage. This practise delays boarding, delays disembarkation, makes the aircraft top heavy in takeoff and landing and creates 'pop open and drop' type accidents. Nothing larger than a purse should be allowed as hand carry."

Pros: "My luggage arrived but traveling companions did not very very frustrating"

Pros: "The service was great"

Pros: "We landed safely."
Cons: "It was freezing. We boarded 1 1/2 hours late. The stewards were a bit short and not very patient. I saw people being allowed to board with way more bags than you said were permitted and some of the on plane bags were so huge that the front people had to check their bags at the last minute. Boarding was slow as it was clear that the stuff was not fitting in the overhead compartments. What happened to dimensions of bag restrictions? It is frustrating to the people that abide by the rules to see them so flagrantly ignored."

Cons: "flight left without 1/6 of the passengers. ¯\_(ツ)_/¯"

Pros: "Dinner was great"

Pros: "Amazing"
Cons: "Nothing"

Cons: "It was fabulous as always! Thank you. I love Delta!"

Cons: "Too hot. Bathrooms were dirty. No leg space in comfort+."

Cons: "Plane was late taking off. Crew did not provide water when requested. They were busy with beverages that they could sell at a cost."

Pros: "The cabin was to warm"
Cons: "The cabin was to warm"

Cons: "Roomier"

Pros: "Just a great experience Delta is still above the rest excluding Hawaiian"
Cons: "Cant think of anything"

Pros: "Everything! Thank you"
Cons: "Nothing. Thanks"

Cons: "Food really bad on both segments."

Pros: "Good access to charging, good food"
Cons: "More space:)"

Cons: "No room to move, too hot, no sound when trying to watch movies."

Cons: "Compared to Virhin Australia crew, Delta staff seem almost poorly trained in comparison. For example, Drlta crew don’t check your pass, don’t immediately move down the aisle to move along tourists busy discussing their seats and then line up for Boarding seems chaotic at best."

Pros: "Nothing"
Cons: "Nothing"

Cons: "Departure delayed by 1hr30"

Pros: "The website delivered everything I needed."
Cons: "More discounts for frequent users."

Cons: "N-S"

Pros: "Awesome prompt and courteous service."
Cons: "Nothing"

Pros: "WiFi on board."

Pros: "."

Cons: "Noise in cabin unable to sleep"

Cons: "Old cramped untidy and limited drink service"

Pros: "Nothing"
Cons: "Multilpe delays"

Pros: "This was our first time flying Delta and it was a very pleasurable experience. Boarding was very straight forward and the seats allocated comfortable. A surprise for us was being asked if we would like to move seats from the back of the aircraft to Comfort Economy (we think it was to do with weight balance! but appreciated very much none the less). The flight attendants were very professional and helpful, as you would hope all attendants on all airlines would be. We'd gladly fly Delta again anytime."

Pros: "Great"
Cons: "Too many announcements"

Pros: "The staff"
Cons: "Nothing"

Pros: "Alaska Airlines is way overpriced and way less comfortable than Delta. I’m a Delta loyalist forever now!"
Cons: "Nothing."

Pros: "Nothing really"
Cons: "Flight delay further to the 30 minutes additional 20 min due to crew being not there"

Cons: "We waited 3 hours for the tarmac in Seattle On Christmas"

Pros: "Quick and easy boarding. Quick flight"
Cons: "Audio entertainment quite limited"

Pros: "Food good, wine OK"
Cons: "Discomfort bad"

Cons: "Price to get a little more space"

Pros: "More seat room than expected for economy tickets. Good service, on time, polite staff"
Cons: "Duty free purchases not waiting for us at boarding like usual. Audio selection on entertainment was v poor"

Cons: "Too crowded."

Pros: "Crew were good, flight on time, free drinks"
Cons: "Nothing"

Cons: "No drink or snack service. No trash pick up. No option to purchase or rent headphones"

Pros: "Fast and efficient boarding again! Most impressed!"

Pros: "everything was very nice"

Pros: "Thomas our steward was excellent."

Cons: "As a Platinum AFK/KLM Skyteam member I was NOT allowed to use the Delta Lounge. On the flight the meal choice was poor and the staff were not really geared to serving regular clients. The movie choice was poor. I expected better!"

Pros: "Enjoyed food and movies.Woul"
Cons: "Would like more comedy or romance movies. Becky"

Cons: "Late and missed my international connection"

Pros: "Very friendly and helpful staff."

Pros: "Very attentative."

Cons: "Aircraft was smelling bad! Hygiene is the key"

Cons: "The food was supposed to be hot chicken was served cold"

Pros: "Helpful staff. Never felt rushed if I had a question. The special meal (VLML) was excellent. Tasty, filling and nutritious Plenty of foot room in economy."

Cons: "It was Delta not Virgin"

Pros: "Nothing. Delta sucks!"
Cons: "Poor management prior boarding"

Cons: "Better boarding and entertainment"

Pros: "The aircraft was barely half full."
Cons: "Delay due to fog at LHR, but this is not the fault of the airline"

Pros: "Staff was extremely nice and helpful"

Pros: "Flight departed on time. Crew were friendly and efficient"
Cons: "Boarding seem to be chaotic, no boarding by group or seat number."

Pros: "-"
Cons: "Will never use Lufthansa again"

Pros: "As previously stated hated having to go through security again"
Cons: "Chocolate"

Cons: "Well,my whole trip was an adventure! Problem with my checked in bag, so i had to pay 22 pounds extra to fit it in a connection flight and now i have to send receipt to get the refund. On my way back, there was a delay, so i missed the flight and the checked in bag"

Pros: "The crew was friendly. The seating was ok but dirty floors"

Pros: "Very Organised and punctual"

Pros: "Everything except delay"
Cons: "Nil"

Pros: "Nothing"
Cons: "Everything"

Pros: "It was not immediately apparent that boarding was in a completely different terminal which was accessible by train, so this lack of info could have cost me arriving in good time as I thought I had sufficient time. I aldo found ground staff at the customer service desk very unsympathetic and unhelpful when I asked for assistance on grounds of ill health. They were quite condescending ."
Cons: "Ground staff poor customer service"

Cons: "Everything"

Pros: "Very friendly crew, great seats in economy with lots of legroom."

Pros: "Evrything"
Cons: "Nothing"

Pros: "The flight was adequate."
Cons: "Sandwich was extremely unappetising and there were no hot drinks. The worst thing was that in transiting from the SAA flight to the Lufthansa flight we were obliged to go through security which seems unnecessary. The security staff were awful. Bullying, rude and totally unsympathetic to the fact that having brought water from the first plane to the second plane we had to either drink it or throw it away. One guy in particular, a tall greying man evoked the worst stereotypes of brutal secret policemen. Perhaps he formerly worked for Stasi or he was having testosterone problems. Totally unacceptable behaviour."

Cons: "1hr 20 minutes late"

Pros: "great over all experiance. Don't let the other negative reviews put you off"

Pros: "The Lufthansa app provides updates on plane status and gate number, etc."
Cons: "N/a"

Pros: "Lufrhansa is a fantastic airline"
Cons: "The seat pitch and width were too small."

Pros: "All"
Cons: "Nothing"

Pros: "Did manage to get priority transfer which I requested from Dubrovnik but was told. “We do not do those”"
Cons: "Rest of the flight was bearable nothing write about. Typical cheap alow cost flight"

Pros: "Ok"

Pros: "See above"

Pros: "The crew was wonderful and this is consistent with my previous experiences with Lufthansa. The salami sandwich provided was actually very good."
Cons: "The slimline seats were not very comfortable. I would hesitate to fly Lufthansa's narrow bodies for flights greater than 2 hours."

Cons: "Rating and bad customer experience shared on web...."

Pros: "The staff were all super helpful and friendly! Pleasure to fly with!"

Cons: "4/4 flights with involuntary stop-overs were delayed, causing 4 panics and 2 missed flights. Given their proclivity for busing passengers to distant planes in Herman efforts, a 50-minute allowance for changing planes, when added to the frequent Kate departures, is just not sufficient. They should acknowledge it and sell only flights that allow for 80-90 minutes in the airports that are so woefully managed (eg, Frankfurt and Munich). It’s back to BA for me!"

Pros: "All the staff were friendly and the complimentary food and drink snacks was lovely."
Cons: "Our flights were delayed both on the way there and back"

Pros: "DID NOT LIKE MY LUGGAGE GOING MISSING! IT'S STILL MISSING AND, AFTER RECEIVING PROMISES OF DELIVERY TODAY, THERE IS NOW NO RECORD OF MY LUGGAGE!"
Cons: "DID NOT LIKE MY LUGGAGE GOING MISSING. IT'S STILL MISSING AND, AFTER RECEIVING PROMISES OF DELIVERY TODAY, THERE IS NOW NO RECORD OF MY LUGGAGE!"

Pros: "The seats and space was ok. Exit from the plane was directly opposite the passport machines and the exit."
Cons: "The flight was very late leaving meaning I arrived in London over an hour late! With knock on problems!"

Pros: "None"
Cons: "Most of it"

Pros: "Usual good service for economy class on this airline"

Cons: "Refusal to board as our flight was a few minutes landing"

Cons: "None of the flights arrived on schedule. That caused other problems. Overall the trip was terrible. Not sure if I will fly lufthansa again nor recommen."

Pros: "The boarding process made it easy to find my seat and get settled in."
Cons: "My seat back didn’t recline. But the one in front of me did. So I was penned in."

Pros: "Darned site more comfortable than the first leg of the journey."
Cons: "Tell your passengers they need hiking boots to get from main concourse to B terminal!"

Pros: "Staff was very friendly and caring."
Cons: "No entertainment and half sandwich with some cookies was the only food we got."

Cons: "N/A"

Pros: "They held the gate for us as we got there about 14 minutes before departure."

Pros: "OK"

Pros: "Nothing"
Cons: "Delay"

Pros: "Clean, friendly environment, friendly staff, even though a bit bossy, but that's the German way (which I am too)."
Cons: "Little space. and NO WIFI. This is really no longer adequate in 2017. In the US, practically all domestic flights have wifi now."

Pros: "787 seat spacing (a UA plane, not LH)"
Cons: "Took first available train , arr. Freising at 9:50. Arrived at Terminal 2 by bus ca. 10:25. I am handicapped and a slow walker, so I got to departure floor ca. `10:40. Waited in line at self-serve check-in; found out that it does not have ability to process numbers (for US address). Attendant was not helpful and nasty. She told me me to go to the regular check-in line, where I waited another 45 minutes. None of the 3 "help" personnel standing around when approached managed to tell me that there was a special counter for handicapped persons. The one at the express self-check-in refused to give me her lasst name or any form of ID (first name Sophia). After waiting an additional 15 minutes for a wheelchair, I was deposited in a waiting area, where a second wheelchair arrived after another long wait. Told me I might not make the plan (I did). Overall a very unpleasant and nasty experience. With the exception of the very nice lady (Mrs. Ilser?? ) who checked in my luggage, none of the other 3 persons at the express and regular check-in spoke decent German or English, and none was helpful (Go there, wait!!!) Barely made the plane in MUC, Heathrow turned out much better than the touted German efficiency. Please forward to Lufthansa customer relations. Dr. W. Hartwig"

Pros: "Our attendents were clearly focused on our needs. Efficient and still very human and kind. A real treat."

Pros: "Everything! Excellent stewards too!"

Pros: "We got there"
Cons: "Had to get a replacement plane when the first one had issues."

Cons: "You lost my luggage"

Pros: "Price"
Cons: "Few choice of movies"

Pros: "On time and smooth"

Pros: "Salimos a tiempo . El business es muy confortable"
Cons: "La comida horrible . No se limpian los baños"

Pros: "Everything perfect and arrive to destination on perfect time."
Cons: "All positive."

Pros: "Comfort"
Cons: "Wifi on klm"

Pros: "Great atmosphere, crew was excellent!"
Cons: "I’m 6’5”, so legroom can always be a complaint, but this wasn’t too bad. The plane appeared to be fairly old and didn’t have WiFi. Entertainment also was on an older screen which was navigated by using an old in-seat phone."

Pros: "The crew tried to be helpful but were equally frustrated with the ground crew."
Cons: "Follow your own policies. Allow people to board (economy plus) with their hand luggage who have followed all the rules and chosen a seat in the front of the plane. My daughter and my KLM approved baggage were taken by the boarding crew while allowing other passengers to go with more than allowed"

Pros: "Good amount of space on the plane, lots of movies to watch, good food and drink."

Pros: "Food was great, enjoyed watching videos, staff very profession and friendly."
Cons: "Boarding was delayed and prolonged My Baggage was not transferred and was not available when I arrived in Dulles."

Pros: "Service and crew amazing friendly and went out of the way to Make u feel special even the pilots gave updates thru out the flight"
Cons: "Not being to help on the ground in Copenhagen with delta issues"

Pros: "Seats super comfy. Ended up with 3 seats to myself that formed a bed for the lap Uk to NZ. Very nice!"

Cons: "Too hot inside the aircraft"

Pros: "Seat was good"
Cons: "Depart on time (1 hour late), hostess put a laptop in the overhead, which fell out and hit me when the bin was opened"

Pros: "the trip was excellent and comfortable. LOved the windows that shaded out rather than the having to pull down the plastic blind. entertainment on board top notch screen huge One hostess , Helen was absolutely fantastic and the best I ve had on my many trips. I will recommend KLM whenever I can"
Cons: "the headrest is hard. Apart from that- all was fine"

Pros: "Nothing!"
Cons: "We were told they were holding our flight, we ran 3 terminals and they’d already left."

Pros: "Overall KLM experience is good"
Cons: "Food quality was mediocre for a business class flight."

Cons: "Lost a single baggage item, a car seat. Critical for us to leave the airport, and delayed us for over an hour upon arrival. Gave us a loaner car seat that barely fit our child."

Pros: "Crew was nice and friendly"
Cons: "Airplane so uncomfortable. Food horrible. Not even available for one of us what we ask for on what was offered. Bad taste and not what can be on a that length of time flight."

Pros: "Food provided, staff kind"
Cons: "Was several hours delayed and check in took 45 minutes because they somehow lost my reservation."

Pros: "Crew was amazing, seats were comfortable with enough leg space even without choosing extra space seats. It was my childhood dream come true to fly with KLM. It was really an exciting trip for me, just that it was short."
Cons: "Well, for me everything was on point. Those who have never travelled with KLM, I would encourage them to do so and I’m sure they will not regret."

Cons: "I called for a crew member 5 times and waited 25 minutes for anyone to help me with just some water. I had to get up and go to the very back of the plane to ask for some water. The plane was hot and no air to be found. This was all after we had to get back off the plane before takeoff. It was terrib"

Pros: "We got to Amsterdam on time"
Cons: "1. Paying for the seats we chose...that will never happen again...I'll fly another airline first. 2. The food was terrible. I have flown KLM for years, this was not what I expected. 3. The plane was very dirty"

Pros: "Shirt flight but well catered, boarding was efficient and quick."
Cons: "Not lots of legroom but adequate for an hour long hop. It was cold on board and also had to board via steps from outside"

Pros: "The crew was efficient. Flight left on time. Food and wine served."
Cons: "No entertainment."

Pros: "kLM staff was great."

Pros: "Food was excellent, service from staff was friendly, and entertainment options were great."
Cons: "Not a lot of shoulder room being in the middle seat. But it had adjustments options for a lot of other things which were good."

Cons: "Our two hour connection in Paris became 30 minutes because Air France was late in leaving Washington. So our luggage didn't make to to KLM to Amsterdam. My poor rating was because the luggage handling was really poor. Lots of flights from Paris to Amsterdam (almost hourly), but my bag showed up 12 hours later. My wife's bag took 36 hours. And yes, we checked in together. There were lots of confusing messages"

Pros: "Norhing"
Cons: "They have mabaged to lost my luggage"

Pros: "Smooth boarding, clean seats/plane, nice small aircraft (2 rows x 2 seats each), surprisingly spacious (more legroom than expected - and I’m 6’2”)."
Cons: "About 1h30min delay without an explanation. All other planes in the terminal seemed to take off on time without a problem, without exception (aside from this flight, of course)."

Pros: "Overall everything was ok."
Cons: "Not that I cared at the time but having been asked for a rating on “entertainment” - there was none. Cheap and cheerful really. No extras over the likes of RyanAir."

Pros: "Comfortable seats. Warm plane with happy staff."
Cons: "Maybe a second sandwich option for food, not everyone likes cheese."

Pros: "Clean airplane, friendly crew, no rush, nice snacks for a short one hour flight. Just generally a positive experience."

Pros: "787 is a great airplane. The 3-3-3 seat configuration leaves enough seat width to be just comfortable in coach."

Pros: "Service provided by the staff"
Cons: "The navigation of the entertainment system is not very friendly"

Pros: "The included snacks and the seats."
Cons: "Nothing."

Pros: "Very little if any."
Cons: "Aircraft was not very clean,the staff seamed quite harsh at times when speaking to customers. The food was really quite poor but it was a short flight to be honest. Overall not as pleasant as the China Southern flights. I would not like to choose them again unless i had to."

Cons: "KLM can't seem to figure out the order of boarding the plane. Should be business - priority - everyone else. Instead they do priority first, and that's usually two-thirds of the passengers. Also, really tired of the fake business class on these flights..."

Pros: "That we didn’t crash"
Cons: "Everything! The crew was rude, no entertainment whatsoever, late boarding, late departure and bad experience with the check in process both in app and on website."

Pros: "Of the multiple international airlines I recently flew with, I would have to say KLM was by far the best. Relaxing atmosphere, comfortable seating, great in-flight entertainment, although I have the go-go in-flight data/entertainment plan with t-mobile (highly recommended), the flight included a decent selection of movies, television programs, etc. The food far exceeded typical "airline quality," even for an international flight - and included a fabulous little snack box with locally sourced gourmet and specialty items such as chocolate from Belgium, fine cheeses from France, and crackers from England. Drinks = gratis, and crew was exceptionally attentive and went out of their way to make flight as pleasant as possible."
Cons: "Nothing."

Pros: "I really like the spaciousness, the plug ins and general service"
Cons: "I have a dairy allergy but had no option to prepurchase a dairy free meal. It made for a very unenjoyable flight as I couldn't eat anything they had. What was worse was after I told them of my situation they said they understood and had a meal that would do but there was cheese, yogurt, milk chocolate, etc."

Cons: "Terrible service in flight and customer service wise .. app functionality was below"

Pros: "The flight was delayed by 40 minutes initially then a further 20 making it an hour late. Sitting at the gate there was then suddenly a last call to board the flight and a mad rush for everyone to get on. I appreciate that delays happen but the lack of communication ragardinh altered boarding times didn't make the situation any easier"
Cons: "As above"

Pros: "Staff superb. They even surprised us with an exit row and a gift for my partners birthday! Amazing. Samantha and Dennis also took time to come and personally wish him a happy birthday. A lovely touch. This airline runs like clockwork. They are just great. The sandwich and stoop waffle are nice too."
Cons: "There is a bus to the plane, so that takes a bit of extra time but they are very well organized."

Pros: "Flight was efficient enough and staff were friendly."
Cons: "It was delayed quite a bit and more on-time updates would have been appeciated."

Pros: "Short, comfortable flight. Nothing special. Got us where we needed to be without incident."
Cons: "Nothing. This is filler text to meet the min. characters."

Pros: "The crew were very friendly and accomodating, plane was clean and boarding amd disembarking was efficiently handled."
Cons: "55 minute delay was not welcome."

Cons: "The crew on the Lagos Amsterdam route (in economy) are particularly unfriendly and brusque. This is my experience each time i fly this route in economy"

Pros: "Staff, service"
Cons: "Nothing"

Cons: "With skyteam elite status cannot select free upgrade from economy to premium economy unless it is 30hrs before boarding for this code share which is actually a KLM flight"

Pros: "I liked the leg room, I liked the customer service of the crew, smooth flight."
Cons: "Both ways up and down I struggled with over-head luggage space. We were allowed a cabin bag and a small hand-bag in the flight but as we were among the last half of the passengers to board the flight we couldn't find anywhere to keep our luggage and the crew had to take them away from us to store them somewhere at the back far away from our seats. As a result we had to wait until all the passengers got off the plane to get back our luggage and we were the last two passengers to get off. Unpleasant!"

Pros: "Overall, good flight"

Pros: "Entertainment, cabin crew great."
Cons: "Seat layout may now be standard but is still cramped."

Pros: "Aeromexico’s service during check in and boarding is the worst I’ve experienced so far. They are so unorganized that wait lines are so long and can take hours that you can easily miss your flight. The staff is just around not helping at all, not doing much to put order and make lines move faster. It’s not the first time this happens to me, it’s just the way they operate and not setup for busy travel days."
Cons: "Make it to the airport 4 hrs earlier, 3 is not enough at least at the Mx city airport"

Cons: "Boarding lines"

Pros: "El asiento Premier cómodo . Acceso a Fast Track en inmigración"
Cons: "Salón premier en terminal 2 para vuelos internacionales tiene que mejorar . Buen servicio en el avión pero no excelente cómo ha sido en otras ocasiones"

Pros: "I was at premier class . Very comfy. Dreamer line are excellent and the service too."
Cons: "Nothing"

Cons: "Food options and more beverage options"

Cons: "They pushed the first leg of my flight forward 15 hours, but only told me 5 hours before my flight, and they didn't even change the second leg. Was on the phone for an hour trying to get a new flight, and there were very few options. Very stressful."

Pros: "Crew very attentive"

Pros: "Nice new 787. Acceptable business class seats (not the best, but OK lie-more-or-less-flat). Better for sleep than seating IMHO."
Cons: "General condition of cabin and amenities are below par for business class long haul. Food is acceptable but not more. Service is just abominable. No attention to the client, no respect. Have a chronic med condition and was brutalized by the crew. Really awful people."

Pros: "Everything"
Cons: "Getting an upgrade"

Pros: "Everything"

Pros: "Customer service was excellent both at the airport and the fight crew. Everybody was really kind and helpful. I would the seats comfortable. I will certainly use Aeromexico again."
Cons: "The plane had a technical problem with the entertainment system. We were told they would reset and restore in 25 min. The system was never restored but we were not informed until we arrived in London. Technical problems are understandable but better communication with passengers should be a priority."

Pros: "Hot food Free entertainment Great Cabin crew fluent in english Airport staff friendly and fluent in english All staff efficient and tolerant of non native speakers"

Cons: "My credit card was cloned (that happened soon after I book my ticket with you) and used in the Middle East. Lots of money were taken, I had to cancel my credit card, I had to go the police, etc, etc I regret to use your services"

Pros: "On time, fast boarding"

Pros: "The plane was not full, so lots of space for my long legs and for a nap!"

Cons: "The flight wad great, but the main problem wss thr smell. For almkst the whole flight it smelled like trash combined with someone's toilet left ovet smell. It was really bad."

Pros: "I upgraded to premium economy and the extra legroom was great Very clean and comfortable plane and great entertainment selection"
Cons: "The breakfast was truly awful. Scrambled eggs with bits of string bean and a portion of black beans all sat in a puddle of hot melted butter. It was so sad and tasted worse"

Pros: "Good entertainment."
Cons: "The flight attendant was rude, they lost my bag and gave me $100 to cover $1000 worth of valuables."

Pros: "Check in process fast and friendly."
Cons: "Screens did not work at all, just a sandwich on a 5 1/2 hour flight, bathroom doors did not lock, overall a poor quality flight."

Cons: "Disorganized, poor communication, crew let's everyone cut in front when they open a new line."

Pros: "it was smooth and I slept"
Cons: "Boarding was a little congestee"

Cons: "Food was cold and mediocre. After flying 6 hours I got up and walked to the galley to see if there was any food and also to get my blood flowing through my body. It was approximately 5 a.m. After standing in the galley for about 5 minutes eating a small sandwich and while drinking my second glass of water, I was told I needed to sit down that I was in the galley too long. Older adults need to move around and get the blood flowing to prevent getting a blood clot. the 3 women stewardesses were busy talking in the galley I guess they felt their privacy and as being invaded."

Pros: "Staff was pleasant, the flight wasn't full and they spaced us out nicely. The volume was difficult but at least the movie/entertainment was available this time on the long flight. Always nice to have something to eat, even if it's not awesome :) Flights were basically on-time."
Cons: "This is not a problem with AeroMexico but I found it absolutely RIDICULOUS that our flight crew had to deplane from their in-bound flight - and Go Through Customs & Immigration - only to turn around and get back on the plane for the return trip. INSANE and Embarrassing as this does not happen in other countries - not even Canada."

Pros: "Excellent customer service and they actually served us delicious dinner, no pretzels nor peanuts ...very impressed !"

Pros: "Courteous crew."
Cons: "N/A"

Pros: "Everything was great,,, good crew attitude"
Cons: "N/A"

Pros: "I’m gonna leave this empty"
Cons: "Just saying... if you are going to have video screens and “entertainment” please make it more than 3 movies- everything else was labeled in entertainment but was not there- just a big tease And there was no WIFI available- even though the whole plane said “WiFi on board” again, a big ol tease Just don’t offer it at all rather than faking it- or at least tell everyone the system is down or not loaded I would’ve bought a book"

Pros: "Excellent Customer Service. Very pleasant flight."

Cons: "Was late 2 hours"

Pros: "boarding, service, entertainment"
Cons: "some music while boarding not of my choosing interfered with my music and seemed unnecessary"

Pros: "The flight loaded, departed and arriverd within minutes of the scheduled times. The departure and arrival times are convenient, but could perhaps be one hour earlier., The entertainment choice was large and seemed to work without a hitch."
Cons: "Some indifferent music over the loudspeakers interferred with my choice of misic and seemed unnecessary."

Cons: "The flight was late with no explanation. On flight entertainment broken, no explanation or apology. Mexico City airport is is disorganized and the bathrooms broken or filthy. They broke three suitcases on my flight, including mine. Quality of service and response is zero."

Pros: "Having a direct flight from Mexico City at a great price with excellent service, what's not to like about it!"

Pros: "On the long leg from Seattle. I was in an empty row so I could stretch out. At least a snack was served after takeoff and before landing."
Cons: "Food was poor and flight delayed because of crew, at least that is what I was told."

Cons: "The food"

Cons: "On of the meals was cheese flavored mush with boiled green beans."

Pros: "Awesome direct flight. Crew was efficient. No crying babies."
Cons: "Didn’t wake me up to offer me a beverage or food :( I was hungry. Oh well. I ate tacos when we landed."

Pros: "The people :) warm kind and helpful flight was delayed though and we had to stay in the plain for almost 2 hrs before we took off .................."

Pros: "Nice airline. Would haoouly ride again."

Pros: "seats were comfortable and temperature was excellent"
Cons: "I had a difficult time locating my luggage in Mexico."

Pros: "Great on time no delays"

Cons: "The seats are very uncomfortable and they need to be replaced I felt pain sitting down the cushion is worn down. had my seat been comfortable I could have rated higher."

Cons: "My fligth was dilay for 2 hours and i got charge a baggeg on a international fligth"

Pros: "Good legroom"

Pros: "attention, service , time"

Pros: "Everything"
Cons: "Nothing was bad."

Cons: "The seats are awful"

Cons: "The reservation people at Aeromexico messed up my flight and kept trying to sell me more flights instead of resolving the issue."

Pros: "No complaints"
Cons: "Nothing"

Cons: "intertainment"

Read more about JetBlue

Top tips for finding a cheap flight

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 867 or less one-way and C$ 533 or less round-trip.
  • The cheapest flight from Seattle to London Heathrow Airport was found, on average, 62 days before departure.
  • Book at least 3 weeks before departure in order to get a below-average price.
  • High season is considered to be November, December and January. The cheapest month to fly is October.
  • Morning departure is around 171% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking Seattle to London Heathrow Airport flights

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Good to know

Low season

OctoberBest time to beat the crowds (11% less expensive on average)

High season

DecemberMost popular time to fly (31% more expensive on average)

Average price round-trip

C$ 732(avg. price over the last 2 weeks)

Good deal round-trip

C$ 533or less

Good deal one-way

C$ 867or less
COVID-19 information

Safety measures for airlines flying from Seattle to London Heathrow Airport

Airlines flying from Seattle to London Heathrow Airport have enacted additional safety measures and adjusted policies to better accommodate travellers. Policies vary by airline.

Heightened sanitation

Daily cleaning, installation of cabin HEPA filters on flights from Seattle to London Heathrow Airport

Mandatory masks

Masks required on board, masks provided on flights from Seattle to London Heathrow Airport

Social distancing seating

Middle seats unavailable to book on flights from Seattle to London Heathrow Airport

Pre-flight testing

Testing for antibodies, testing for symptoms for flights from Seattle to London Heathrow Airport

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