$151 Find Cheap Flights from London to the United States - Compare and Save

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 8/18. 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
Newark1 stop$531
Los Angeles
Los Angeles2 stops$309
Las Vegas
Las Vegas2 stops$321
San Francisco
San Francisco1 stop$257
Miami
Miami1 stop$549
Boston
Boston2 stops$481
Fort Lauderdale
Fort Lauderdale1 stop$569
Seattle
Seattle1 stop$352
Tampa
Tampa2 stops$488
San Diego
San Diego1 stop$342
Honolulu
Honolulu2 stops$650
New York
Newark1 stop$531
Los Angeles
Los Angeles2 stops$309
Las Vegas
Las Vegas2 stops$321
San Francisco
San Francisco1 stop$257
Miami
Miami1 stop$549
Boston
Boston2 stops$481
Fort Lauderdale
Fort Lauderdale1 stop$569
Seattle
Seattle1 stop$352
Tampa
Tampa2 stops$488
San Diego
San Diego1 stop$342
Honolulu
Honolulu2 stops$650

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

Wed, Aug 19 - Wed, Aug 26
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
$257WestJet
Fri, Aug 21 - Sat, Aug 29
WestJet Logo
2:40 pm - 9:55 pm
YXU
-
SFO
10h 15m
2 stops
WestJet Logo
1:00 pm - 1:50 pm
SFO
-
YXU
21h 50m
2 stops
$289WestJet
Fri, Aug 21 - Sat, Aug 29
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
1:00 pm - 1:50 pm
SFO
-
YXU
21h 50m
2 stops
$291WestJet
Fri, Sep 11 - Tue, Sep 15
WestJet Logo
6:10 am - 4:00 pm
YXU
-
LAX
12h 50m
2 stops
WestJet Logo
6:05 pm - 5:20 am
LAX
-
YXU
8h 15m
1 stop
$309WestJet
Tue, Sep 8 - Tue, Sep 15
Air Canada Logo
5:40 am - 10:34 am
YXU
-
LAX
7h 54m
1 stop
Air Canada Logo
11:55 am - 9:40 pm
LAX
-
YXU
6h 45m
1 stop
$315Air Canada
Thu, Sep 10 - Mon, Sep 14
Air Canada Logo
10:05 am - 3:35 pm
YXU
-
LAX
8h 30m
1 stop
Air Canada Logo
10:35 pm - 9:20 am
LAX
-
YXU
7h 45m
1 stop
$362Air Canada
Tue, Sep 1 - Tue, Sep 8
United Airlines Logo
10:05 am - 8:19 pm
YXU
-
SNA
13h 14m
2 stops
United Airlines Logo
6:45 am - 9:20 am
SNA
-
YXU
23h 35m
2 stops
$465United Airlines
Sun, Aug 30 - Sun, Sep 6
United Airlines Logo
10:05 am - 6:51 pm
YXU
-
SNA
11h 46m
2 stops
United Airlines Logo
3:10 pm - 5:45 pm
SNA
-
YXU
23h 35m
3 stops
$493United Airlines
Fri, Aug 28 - Sun, Aug 30
Multiple Airlines Logo
6:10 am - 4:35 pm
YXU
-
JFK
10h 25m
1 stop
Multiple Airlines Logo
11:00 am - 5:20 am
JFK
-
YXU
42h 20m
3 stops
$794Multiple Airlines
Fri, Oct 2 - Mon, Oct 5
Multiple Airlines Logo
6:10 am - 4:35 pm
YXU
-
JFK
10h 25m
1 stop
Multiple Airlines Logo
11:31 am - 5:20 am
JFK
-
YXU
17h 49m
2 stops
$797Multiple 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 September, when tickets cost $421 (return) on average. On the other hand, the most expensive months are March and December, when the average cost of round-trip tickets is $675 and $551 respectively.

Find deals

Good to know

Low season

May

Cheapest flight

$151
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 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 11359 reviews
7.3Boarding
6.8Entertainment
7.8Crew
7.1Comfort
6.3Food
Airline reviews

Horrible! Rude flight attendant, barely any service on such a long flight. I wouldn't recommend Air Canada to anyone.

2.0 MediocreAnonymous, Jul 2026
YYZ - SFO
Read more Air Canada reviews

Horrible! Rude flight attendant, barely any service on such a long flight. I wouldn't recommend Air Canada to anyone.

Canceled my flight in March and have been waiting for 3 months now without the refund after it was promised

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.

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

London (YXU)