C$ 144 Find Cheap Flights from London to Washington

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Washington departing on 30/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Washington

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Washington, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Washington, as well as popular online travel agencies
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Flights Deals

Best Washington Flight Deals from London

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Seattle
Seattle1 stopC$ 299
Seattle
Seattle1 stopC$ 299

Cheap Flights from London to Washington

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to Washington that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from London to Washington

Tue, 29 Jul - Tue, 5 Aug
WestJet Logo
6:00 a.m. - 12:58 p.m.YXU-SEA
9h 58m1 stop
WestJet Logo
7:35 p.m. - 5:14 a.m.SEA-YXU
6h 39m1 stop
C$ 299WestJet
Find Deal
Wed, 30 Jul - Wed, 6 Aug
WestJet Logo
8:00 p.m. - 6:38 p.m.YXU-SEA
25h 38m1 stop
WestJet Logo
7:35 p.m. - 5:14 a.m.SEA-YXU
6h 39m1 stop
C$ 326WestJet
Find Deal
Wed, 30 Jul - Wed, 6 Aug
Air Canada Logo
6:15 a.m. - 11:00 a.m.YXU-SEA
7h 45m1 stop
Air Canada Logo
7:15 p.m. - 9:17 a.m.SEA-YXU
11h 02m2 stops
C$ 344Air Canada
Find Deal
Wed, 16 Jul - Thu, 17 Jul
WestJet Logo
6:00 a.m. - 8:28 p.m.YXU-SEA
17h 28m1 stop
WestJet Logo
7:35 p.m. - 5:14 a.m.SEA-YXU
6h 39m1 stop
C$ 348WestJet
Find Deal
Thu, 24 Jul - Sun, 27 Jul
WestJet Logo
8:00 p.m. - 8:28 p.m.YXU-SEA
27h 28m1 stop
WestJet Logo
7:35 p.m. - 5:14 a.m.SEA-YXU
6h 39m1 stop
C$ 353WestJet
Find Deal
Tue, 29 Jul - Tue, 5 Aug
 Logo
5:45 p.m. - 9:21 a.m.YXU-SEA
18h 36m2 stops
 Logo
7:35 p.m. - 5:14 a.m.SEA-YXU
6h 39m1 stop
C$ 411
Find Deal
Wed, 16 Jul - Thu, 17 Jul
Air Canada Logo
6:15 a.m. - 11:00 a.m.YXU-SEA
7h 45m1 stop
Air Canada Logo
7:20 a.m. - 9:17 a.m.SEA-YXU
22h 57m2 stops
C$ 429Air Canada
Find Deal
Wed, 30 Jul - Wed, 6 Aug
United Airlines Logo
6:15 a.m. - 11:00 a.m.YXU-SEA
7h 45m1 stop
United Airlines Logo
7:34 p.m. - 3:02 p.m.SEA-YXU
16h 28m3 stops
C$ 490United Airlines
Find Deal
Tue, 29 Jul - Tue, 5 Aug
United Airlines Logo
6:15 a.m. - 3:53 p.m.YXU-SEA
12h 38m2 stops
United Airlines Logo
11:45 p.m. - 3:02 p.m.SEA-YXU
12h 17m2 stops
C$ 497United Airlines
Find Deal
Wed, 30 Jul - Wed, 6 Aug
 Logo
9:45 p.m. - 7:21 p.m.YXU-SEA
24h 36m3 stops
 Logo
7:15 p.m. - 9:17 a.m.SEA-YXU
11h 02m2 stops
C$ 508
Find Deal
Useful Info

KAYAK's insights & trends for London to Washington flights

Get data-powered insights and trends into flights from London to Washington to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from London to Washington?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from London to Washington were found on WestJet (C$ 299) and Air Canada (C$ 344).


Good to know

Cheapest flightC$ 144
Flight from London to Portland

FAQs - booking Washington flights

  • How does KAYAK find such low prices on flights from London to Washington?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Washington.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Washington?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London to Washington is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to Washington?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from London to Washington with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Washington?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from London to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Washington?

    The cheapest time of day to fly to Washington is generally in the evening, when round-trip flights cost C$ 403 on average. Morning departures are around 1% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the morning, which is peak travel time and where the average cost of a ticket is C$ 409.

Top 3 airlines serving from London to Washington

 
See real verified KAYAK customer reviews for airlines flying from London to Washington. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from London to Washington? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8801 reviews
8.1Crew
7.0Entertainment
7.3Comfort
7.7Boarding
6.6Food
Airline reviews

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

10.0 ExcellentAnonymous, Jun 2025YVR - DEN
Read more United Airlines reviews

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

Very nice and clean plane. Transit time between flights was tight though

Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy

So far so good but food and entertainment are not available for this flight

leg space better than expected. two washrooms for one plane isn't enough.

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Michael, our FA was very attentive, even finding me a chocolate brownie from economy class when the dessert selections were all dairy based. ( intolerant, not allergic so don’t usually need to order dairy free)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

The seats are totally uncomfortable making the flight less than pleasant. The cookies & pretzels were terrible!!!

Not the greatest experience everything was pretty mediocre. My seat was by the washroom in the aisle and was not located well as everyone past each other people were right in my seat and space.

The small prop plane was crowded and the overhead luggage storage is a smaller than on the jets. Other than that, the crew was good, the flight was on time and the landing was smooth.

There was a medical emergency that the crew handled very well. There was no “entertainment” of any sort-no movie/music/whatever. Food was typical of airlines: mediocre.

Late departure, so I missed connection in Detroit. But Delta gave me a great hotel & breakfast. Just sorry I could not get anything from my checked baggage.

Crew was friendly. Lost our luggage and told us it’d be in later in the evening of the day we returned. It was not. Still after 5 days have not received it.

Internet on both flights was sketchy. Thus in flight entertainment was non- existent on MN - Balrimote leg.

We never had an experience they canceled the flight and they did not offer us an alternative flight. I had to book one on my own expense. They offered us food voucher and we could not use them at the airport it kept saying not attached to an existing flight. The people at the counter were rude and cold and they did not care about our situation

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

Found the seats very crowded—too close together ! And waited a long time for our luggage All staff at both ends were excellent!!!

No space in overhead bin, one cookie, 2 oz of juice - is not customer service.

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

The ground staff was so rude in Toronto airport ...very rude and did not answer simple questions, and made me look like a fool. Very rude ground staff.

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

I had a nice flight with free wifi. So I was able to message family members and stream music during my flight, which made the trip go by fast. I also enjoyed flying on there Airbus A220. The plane looked very new and it also got up to speed fast down the runway and didn't need much runway to get airborne.

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Boarding was challenging as we had to use the stairs from the tarmac. Stairs are okay but a roller bag makes it challenging.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

All was fine. Weather was a bit stormy, but nothing kayak can do about that! 😊

I paid for a comfort class seat and was seated in economy.

Everything you need to know for your flight from London to Washington

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