$157 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 2/15. 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$441
Los Angeles
Los Angeles2 stops$373
Las Vegas
Las Vegas2 stops$301
Miami
Miami1 stop$464
San Francisco
San Francisco1 stop$274
Boston
Boston1 stop$594
Fort Lauderdale
Fort Lauderdale1 stop$403
Seattle
Seattle2 stops$417
Tampa
Tampa1 stop$359
Honolulu
Honolulu2 stops$408
San Diego
San Diego1 stop$472
New York
New York1 stop$441
Los Angeles
Los Angeles2 stops$373
Las Vegas
Las Vegas2 stops$301
Miami
Miami1 stop$464
San Francisco
San Francisco1 stop$274
Boston
Boston1 stop$594
Fort Lauderdale
Fort Lauderdale1 stop$403
Seattle
Seattle2 stops$417
Tampa
Tampa1 stop$359
Honolulu
Honolulu2 stops$408
San Diego
San Diego1 stop$472

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

Sun, May 24 - Mon, Jun 8
WestJet Logo
6:15 am - 12:00 pm
YXU
-
SFO
8h 45m
1 stop
WestJet Logo
6:05 pm - 5:25 am
SFO
-
YXU
8h 20m
1 stop
$274WestJet
Sun, May 24 - Mon, Jun 8
WestJet Logo
2:35 pm - 9:55 pm
YXU
-
SFO
10h 20m
2 stops
WestJet Logo
6:05 pm - 5:25 am
SFO
-
YXU
8h 20m
1 stop
$290WestJet
Tue, May 26 - Tue, Jun 9
WestJet Logo
6:15 am - 12:00 pm
YXU
-
SFO
8h 45m
1 stop
WestJet Logo
6:05 pm - 5:25 am
SFO
-
YXU
8h 20m
1 stop
$298WestJet
Mon, May 25 - Mon, Jun 8
WestJet Logo
5:55 pm - 9:55 pm
YXU
-
SFO
31h 00m
1 stop
WestJet Logo
6:05 pm - 5:25 am
SFO
-
YXU
8h 20m
1 stop
$299WestJet
Sat, Apr 25 - Sat, May 2
Air Canada Logo
5:10 am - 3:32 pm
YXU
-
SFO
13h 22m
2 stops
Air Canada Logo
7:30 pm - 11:43 am
SFO
-
YXU
13h 13m
2 stops
$397Air Canada
Mon, Apr 13 - Fri, Apr 17
Air Canada Logo
5:10 am - 11:11 am
YXU
-
FLL
6h 01m
1 stop
Air Canada Logo
11:15 am - 5:03 pm
FLL
-
YXU
5h 48m
1 stop
$403Air Canada
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
6:15 am - 12:43 pm
YXU
-
SEA
9h 28m
2 stops
Multiple Airlines Logo
7:35 pm - 5:25 am
SEA
-
YXU
6h 50m
1 stop
$417Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
6:15 am - 7:52 pm
YXU
-
SEA
16h 37m
1 stop
Multiple Airlines Logo
7:35 pm - 5:25 am
SEA
-
YXU
6h 50m
1 stop
$466Multiple Airlines
Sun, Mar 8 - Sat, Mar 14
United Airlines Logo
5:40 pm - 1:15 pm
YXU
-
MIA
19h 35m
2 stops
United Airlines Logo
6:00 am - 5:05 pm
MIA
-
YXU
11h 05m
2 stops
$523United Airlines
Sun, Mar 8 - Thu, Mar 12
United Airlines Logo
5:10 am - 9:50 am
YXU
-
ORD
5h 40m
1 stop
United Airlines Logo
8:50 am - 5:05 pm
ORD
-
YXU
7h 15m
2 stops
$598United 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 London to the United States flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to the United States from London found in the last 72 hours was to Orlando, at $171 round-trip. The most popular route is from London (YXU) to Orlando Airport (MCO), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $171.

Can I save money by flying with a layover from London to the United States?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $171, prices are generally cheapest when you fly direct.

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 $238 (return) on average. On the other hand, the most expensive months are December and January, when the average cost of round-trip tickets is $1,061 and $622 respectively.

Good to know

Low seasonOctober
Cheapest flight$157
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from London to Seattle

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 10667 reviews
7.1Comfort
7.8Crew
7.3Boarding
6.3Food
6.8Entertainment
Airline reviews

My seat was covered in vomit and I will be reaching out to Air Canada

2.0 MediocreAnonymous, Dec 2025
YYZ - MCO
Read more Air Canada reviews

My seat was covered in vomit and I will be reaching out to Air Canada

It's kindof ridiculous that your system is even asking me about this since my flight was canceled and I wasn't rescheduled.

3 hr delay at the gate while they were doing maintenance. Next time, do not board passengers while maintenance is being performed

Digital check in is very poor with air canada compaired to other airlines

Baggage delayed we had to catch our cruise without any clothes 😒

Air Canada Rouge is great. Toronto Airport is the usual nightmare

Good but need to be better with the flight times.

The staff was great and made the long trip easy peasy!

The free Wi-fi for Aeroplan members was a great touch. The time passed quickly. I found the seats seemed a little closer together than I remember. Not Air Canada's fault, but we were about 20 minutes late landing because the airport was too busy. We had to circle around for a while. The boarding and disembarking went very smoothly.

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

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

Information on your arrival and departure airports