C$ 336 Find Cheap Flights from London to the United States

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 the United States departing on 7/8. 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, 0 bags

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Flight Deals

Best United States Flight Deals from London

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Fort Lauderdale
Fort Lauderdale1 stopC$ 700
Orlando
Orlando1 stopC$ 729
New York
New York1 stopC$ 714
Las Vegas
Las Vegas1 stopC$ 511
Los Angeles
Los Angeles2 stopsC$ 451
Miami
Miami1 stopC$ 799
San Francisco
San Francisco1 stopC$ 368
Tampa
Tampa2 stopsC$ 704
Honolulu
Honolulu2 stopsC$ 1,013
Seattle
Seattle1 stopC$ 492
Boston
Boston1 stopC$ 762
Atlanta
Atlanta1 stopC$ 847
Fort Myers
Fort Myers1 stopC$ 700
San Diego
San Diego2 stopsC$ 552
Fort Lauderdale
Fort Lauderdale1 stopC$ 700
Orlando
Orlando1 stopC$ 729
New York
New York1 stopC$ 714
Las Vegas
Las Vegas1 stopC$ 511
Los Angeles
Los Angeles2 stopsC$ 451
Miami
Miami1 stopC$ 799
San Francisco
San Francisco1 stopC$ 368
Tampa
Tampa2 stopsC$ 704
Honolulu
Honolulu2 stopsC$ 1,013
Seattle
Seattle1 stopC$ 492
Boston
Boston1 stopC$ 762
Atlanta
Atlanta1 stopC$ 847
Fort Myers
Fort Myers1 stopC$ 700
San Diego
San Diego2 stopsC$ 552

Cheap Flights from London to the United States

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to the United States 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 the United States

Fri, 7 Aug - Thu, 13 Aug
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:05 p.m. - 5:20 a.m.
SFO
-
YXU
8h 15m
1 stop
C$ 368WestJet
Sun, 13 Sep - Sun, 20 Sep
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 a.m. - 4:45 p.m.
SFO
-
YXU
7h 45m
1 stop
C$ 390WestJet
Tue, 15 Sep - Tue, 22 Sep
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 a.m. - 5:20 a.m.
SFO
-
YXU
20h 20m
1 stop
C$ 431WestJet
Fri, 7 Aug - Thu, 13 Aug
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
1:00 p.m. - 1:50 p.m.
SFO
-
YXU
21h 50m
2 stops
C$ 446WestJet
Wed, 23 Sep - Sat, 26 Sep
Air Canada Logo
3:30 p.m. - 8:59 p.m.
YXU
-
SFO
8h 29m
1 stop
Air Canada Logo
4:40 p.m. - 9:20 a.m.
SFO
-
YXU
13h 40m
1 stop
C$ 497Air Canada
Tue, 11 Aug - Fri, 14 Aug
WestJet Logo
6:10 a.m. - 12:55 p.m.
YXU
-
LAS
9h 45m
1 stop
WestJet Logo
1:20 p.m. - 5:20 a.m.
LAS
-
YXU
13h 00m
2 stops
C$ 511WestJet
Wed, 23 Sep - Sat, 26 Sep
Air Canada Logo
6:20 p.m. - 10:20 a.m.
YXU
-
SFO
19h 00m
2 stops
Air Canada Logo
12:50 p.m. - 9:20 a.m.
SFO
-
YXU
17h 30m
2 stops
C$ 524Air Canada
Wed, 29 Jul - Wed, 5 Aug
United Airlines Logo
10:05 a.m. - 9:00 p.m.
YXU
-
IAD
10h 55m
2 stops
United Airlines Logo
6:10 a.m. - 9:40 p.m.
IAD
-
YXU
15h 30m
2 stops
C$ 927United Airlines
Thu, 17 Sep - Sun, 20 Sep
Multiple Airlines Logo
5:55 p.m. - 11:51 a.m.
YXU
-
JFK
17h 56m
2 stops
Multiple Airlines Logo
5:30 p.m. - 5:20 a.m.
JFK
-
YXU
11h 50m
1 stop
C$ 1,013Multiple Airlines
Thu, 1 Oct - Sun, 4 Oct
Multiple Airlines Logo
5:55 p.m. - 11:51 a.m.
YXU
-
JFK
17h 56m
2 stops
Multiple Airlines Logo
5:30 p.m. - 5:20 a.m.
JFK
-
YXU
11h 50m
1 stop
C$ 1,063Multiple Airlines
Booking Insights

KAYAK's insights & trends for London to the United States flights

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

What is the cheapest month to fly from London to the United States?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to the United States, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London to the United States is August, when tickets cost C$ 226 (return) on average. On the other hand, the most expensive months are April and March, when the average cost of round-trip tickets is C$ 474 and C$ 447 respectively.

Good to know

Low seasonMay
Cheapest flightC$ 336
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from London to San Francisco

FAQs - booking United States flights

  • How does KAYAK find such low prices on flights from London to the United States?

    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 the United States.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London to the United States 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 the United States?

    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 the United States 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 the United States?

    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 the United States up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines flying from London to the United States

 
Need help choosing which airline to fly with from London to the United States? 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 9895 reviews
7.3Comfort
7.1Entertainment
6.6Food
7.7Boarding
8.1Crew
Airline reviews

Prefer not to have an almost 3 hour delay with useless communication that wasn't accurate.

2.0 MediocreGreg, Jun 2026
YYZ - ORD
Read more United Airlines reviews

Prefer not to have an almost 3 hour delay with useless communication that wasn't accurate.

Boarding was smooth and efficient. The only food was some pretzels, but it was a short flight. Not much to order if you were hungry.

Crew were welcoming, accommodating and they worked hard to find places for all carry on.

Seats very comfortable; service efficient and pleasant; flight was on-time; boarding organized.

Starlink is great Crew was polite Business class didn’t get a welcome drink just water and snacks were ok

very average service no complimentary alcoholics drinks unlike other airlines such as Porter airlines No decent seats available during check-in time the day before

Hopped on time for the flight only to get deplaned and delayed another 2.5 hours.

Flight attendants had a little attitude. Food tastes no good.

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

Experience was good, the wifi hook up is somewhat tough

I will not be flying with westjet again. I was uncomfortable in my seat. The position made my back hurt so bad. My wife was able to fit the seatbelt around her with out an extension but was unable to put the tray table down or fit in the seat for that matter. Our bag was smashed and I spent two hours trying to fill out the application for a damaged bag before I gave up. The 80 photos I took would not work and nothing telling me the format to upload them as.. I made the mistake of unpacking the bag before taking photos so no claim for me. Next trip to Canada I will have to use air Canada.

Airplane is too small. Crew, especially the flight attendant who looked after our area, was not at all friendly and a touch authoratative. She may have been the most gruff flight attendant i've come across in 40 years of business travel

I selected "carry-on" for a round trip on Kayak, but my return flight on WestJet did not include a carry-on and they would not allow me to add one. My only option was to add a "checked bag" which I had to wait for on the luggage carousel after landing. Not a good experience.

No dogs! Can we have no dogs in the cabin? Why was there a yappy little dog behind me? Lucky I had ear plugs. Sorry for others without

Absolutely terrible, from the customer service to boarding the plane. On the phone, there was some mishaps with getting in my correct date and they did not help me retrieve a refund or any assistance. I’m gonna be reporting to all my followers and family around the region of Los Angeles to New York.

Arrival at Comox from, London,ON 6 hours later... No bueano

Flight delayed, missed my pick-up had to Uber, plus missed dinner and medication, so sad!

Nothing to like because my inbound flight was cancelled without notification by West Jet or third party, JustFly. I couldn’t take the inbound flight due to cancellation; therefore could not take the outbound flight back.

I booked through westjet. The first flight left late and cost us the connection to the second flight. The second flight after a 4 hour delay was again late because they were short an attendant. Then a door malfunctioned on the plane which led to yet another plane. So by the time we left Calgary we missed the BC ferry and had to pay a charge to get a later one. It ended up being a 24 hour day. That wrecked our first day and part of the second day in BC because we were so overtired.

Smooth ride but I wish they have better food selections.

Aircraft is designed with all 3 washrooms at the back of the plane, meaning that when there is service underway, there are no washrooms available and it gets very crowded at the back of the plane.

The flight was good. My luggage didn’t land with me when I arrived in Columbus. So grateful I was able to get my luggage back within the 2 hours😍👍.

It was a nice and smooth trip. Gave a friendly environment throughout the journey.

Meal and drink service was good. Old plane with old business class seats were quite disappointing

Flight itself was not bad at all. However: my checked bag (checked in Calgary) did not make it onto this flight as I found out after I landed at EWR. I still don't have it but it appears that it is on its way to me.

Too many delays. Seats too small. A budget airline. Will never fly Air Canada again.

Horrible, we were on a little DeHaviland 400 that was really small and shaky. I am 5' 4" and I had to duck my head to get in it felt like an old war plane.

It might have been closer to being on time. Maybe next time I could fly from London to Toronto?

Air Canada canceled my flight last minute and I gave me next’s day night time my flight. No accommodations at all. I have a function on Xmas eve. So I had to took rental car last minute.i never ever book a ticket with Canadian airlines at all.

Everything you need to know for your flight from London to the United States

Information on your arrival and departure airports