$207 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 8/4. 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

Cheap Flights from London to the United States

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
New York
New York1 stop$540
Los Angeles
Los Angeles1 stop$366
Las Vegas
Las Vegas1 stop$410
San Francisco
San Francisco1 stop$278
Miami
Miami1 stop$566
Boston
Boston1 stop$503
Fort Lauderdale
Fort Lauderdale1 stop$491
Seattle
Seattle1 stop$342
Tampa
Tampa1 stop$487
San Diego
San Diego1 stop$353
Honolulu
Honolulu2 stops$706
New York
New York1 stop$540
Los Angeles
Los Angeles1 stop$366
Las Vegas
Las Vegas1 stop$410
San Francisco
San Francisco1 stop$278
Miami
Miami1 stop$566
Boston
Boston1 stop$503
Fort Lauderdale
Fort Lauderdale1 stop$491
Seattle
Seattle1 stop$342
Tampa
Tampa1 stop$487
San Diego
San Diego1 stop$353
Honolulu
Honolulu2 stops$706

Book Cheap London to the United States Plane Tickets

 
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

Mon, Aug 24 - Mon, Aug 31
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
$278WestJet
Mon, Aug 24 - Mon, Aug 31
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 am - 1:50 pm
SFO
-
YXU
28h 50m
2 stops
$305WestJet
Thu, Oct 8 - Tue, Oct 13
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 am - 5:20 am
SFO
-
YXU
20h 20m
1 stop
$344WestJet
Thu, Oct 8 - Tue, Oct 13
WestJet Logo
6:10 am - 9:55 pm
YXU
-
SFO
18h 45m
1 stop
WestJet Logo
6:00 am - 5:20 am
SFO
-
YXU
20h 20m
1 stop
$362WestJet
Fri, Sep 4 - Tue, Sep 8
Air Canada Logo
3:30 pm - 9:02 pm
YXU
-
SFO
8h 32m
1 stop
Air Canada Logo
8:10 am - 9:40 pm
SFO
-
YXU
10h 30m
2 stops
$368Air Canada
Fri, Sep 4 - Tue, Sep 8
Air Canada Logo
10:05 am - 8:51 pm
YXU
-
SFO
13h 46m
2 stops
Air Canada Logo
8:10 am - 9:40 pm
SFO
-
YXU
10h 30m
2 stops
$371Air Canada
Sat, Aug 29 - Wed, Sep 2
Multiple Airlines Logo
6:10 am - 12:25 pm
YXU
-
LAX
9h 15m
1 stop
Multiple Airlines Logo
6:30 am - 5:20 am
LAX
-
YXU
19h 50m
2 stops
$423Multiple Airlines
Tue, Aug 4 - Tue, Aug 11
Multiple Airlines Logo
6:10 am - 12:25 pm
YXU
-
LAX
9h 15m
1 stop
Multiple Airlines Logo
10:25 pm - 2:50 pm
LAX
-
YXU
13h 25m
2 stops
$453Multiple Airlines
Sat, Jul 18 - Fri, Jul 24
United Airlines Logo
10:05 am - 10:51 pm
YXU
-
ONT
15h 46m
2 stops
United Airlines Logo
1:50 pm - 5:42 pm
ONT
-
YXU
24h 52m
3 stops
$684United Airlines
Sat, Aug 1 - Sat, Aug 8
United Airlines Logo
10:05 am - 10:51 pm
YXU
-
ONT
15h 46m
2 stops
United Airlines Logo
6:10 am - 9:40 pm
ONT
-
YXU
12h 30m
2 stops
$685United 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 $159 (return) on average. On the other hand, the most expensive months are April and March, when the average cost of round-trip tickets is $334 and $315 respectively.

Find deals

Good to know

Low seasonMay
Cheapest flight$207
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from London to Las Vegas

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 travelers 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 airline 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.
7.1
Air CanadaOverall score based on 11231 reviews
6.3Food
7.3Boarding
6.8Entertainment
7.8Crew
7.1Comfort
Airline reviews

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.

6.0 GoodMark, Jun 2026
YYZ - SFO
Read more Air Canada reviews

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.

Flight and attendance were very good we had 2 hour delay that took the shine of it

The seat design in the premium economy section leaves virtually no room under the seat to store a bag or purse. Other than that, it was a great flight. Arrived early.

The flight was delayed, but not for weather. We landed over 3hrs later than planned.

The stag were helpful, kind and liked the passengers. The plane was pristinely clean! Great flight!

My flight was delayed more than once, but Air Canada updated us regularly. Friends on other airlines had much worse experiences.

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

Information on your arrival and departure airports

London (YXU)