$150 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 8/19. 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

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Booking Insights
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 Angeles1 stop$339
Las Vegas
Las Vegas2 stops$359
San Francisco
San Francisco1 stop$298
Miami
Miami1 stop$562
Boston
Boston1 stop$539
Fort Lauderdale
Fort Lauderdale1 stop$493
Seattle
Seattle1 stop$353
Tampa
Tampa2 stops$497
San Diego
San Diego2 stops$409
Honolulu
Honolulu2 stops$713
New York
Newark1 stop$531
Los Angeles
Los Angeles1 stop$339
Las Vegas
Las Vegas2 stops$359
San Francisco
San Francisco1 stop$298
Miami
Miami1 stop$562
Boston
Boston1 stop$539
Fort Lauderdale
Fort Lauderdale1 stop$493
Seattle
Seattle1 stop$353
Tampa
Tampa2 stops$497
San Diego
San Diego2 stops$409
Honolulu
Honolulu2 stops$713

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

Thu, Aug 13 - Thu, Aug 20
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 am - 4:45 pm
SFO
-
YXU
7h 45m
1 stop
$298WestJet
Mon, Aug 17 - Mon, Aug 24
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:05 pm - 4:45 pm
SFO
-
YXU
19h 40m
1 stop
$327WestJet
Thu, Aug 13 - Thu, Aug 20
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
$331WestJet
Sat, Oct 10 - Thu, Oct 15
WestJet Logo
6:10 am - 10:05 pm
YXU
-
LAX
18h 55m
1 stop
WestJet Logo
6:05 pm - 5:20 am
LAX
-
YXU
8h 15m
1 stop
$339WestJet
Sat, Oct 31 - Wed, Nov 4
Air Canada Logo
3:25 pm - 8:04 pm
YXU
-
LAX
7h 39m
1 stop
Air Canada Logo
7:20 am - 9:52 pm
LAX
-
YXU
11h 32m
2 stops
$369Air Canada
Sat, Oct 31 - Wed, Nov 4
Air Canada Logo
3:25 pm - 8:04 pm
YXU
-
LAX
7h 39m
1 stop
Air Canada Logo
7:20 am - 9:52 pm
LAX
-
YXU
11h 32m
2 stops
$370Air Canada
Fri, Oct 2 - Mon, Oct 5
United Airlines Logo
3:30 pm - 9:29 am
YXU
-
SNA
20h 59m
2 stops
United Airlines Logo
6:22 pm - 2:55 pm
SNA
-
YXU
17h 33m
3 stops
$415United Airlines
Fri, Oct 2 - Mon, Oct 5
United Airlines Logo
10:05 am - 6:41 pm
YXU
-
SNA
11h 36m
2 stops
United Airlines Logo
9:00 pm - 2:55 pm
SNA
-
YXU
14h 55m
2 stops
$416United Airlines
Tue, Aug 11 - Fri, Aug 14
Multiple Airlines Logo
8:40 pm - 11:50 am
YXU
-
JFK
15h 10m
2 stops
Multiple Airlines Logo
5:30 pm - 5:20 am
JFK
-
YXU
11h 50m
1 stop
$673Multiple Airlines
Thu, Sep 17 - Sun, Sep 20
Multiple Airlines Logo
5:55 pm - 11:51 am
YXU
-
JFK
17h 56m
2 stops
Multiple Airlines Logo
5:30 pm - 5:20 am
JFK
-
YXU
11h 50m
1 stop
$714Multiple 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$150
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 11291 reviews
7.1Comfort
6.8Entertainment
7.3Boarding
6.3Food
7.8Crew
Airline reviews

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

2.0 MediocreAnonymous, Jun 2026
YYZ - EWR
Read more Air Canada reviews

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.

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

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)