$171 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 10/6. 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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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$458
Los Angeles
Los Angeles1 stop$372
Las Vegas
Las Vegas1 stop$376
San Francisco
San Francisco1 stop$321
Miami
Miami1 stop$381
Boston
Boston2 stops$458
Fort Lauderdale
Fort Lauderdale1 stop$293
Seattle
Seattle1 stop$362
Tampa
Tampa1 stop$323
San Diego
San Diego1 stop$436
Honolulu
Honolulu2 stops$644
New York
Newark1 stop$458
Los Angeles
Los Angeles1 stop$372
Las Vegas
Las Vegas1 stop$376
San Francisco
San Francisco1 stop$321
Miami
Miami1 stop$381
Boston
Boston2 stops$458
Fort Lauderdale
Fort Lauderdale1 stop$293
Seattle
Seattle1 stop$362
Tampa
Tampa1 stop$323
San Diego
San Diego1 stop$436
Honolulu
Honolulu2 stops$644

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

Fri, Sep 11 - Wed, Sep 16
WestJet Logo
6:10 am - 12:00 pmYXU  London-SFO San Francisco
8h 50m1 stop Calgary
WestJet Logo
6:05 pm - 5:20 amSFO  San Francisco-YXU London
8h 15m1 stop Calgary
$321WestJet
Fri, Sep 11 - Wed, Sep 16
WestJet Logo
6:10 am - 12:00 pmYXU  London-SFO San Francisco
8h 50m1 stop Calgary
WestJet Logo
6:05 pm - 5:20 amSFO  San Francisco-YXU London
8h 15m1 stop Calgary
$328WestJet
Mon, Sep 21 - Fri, Sep 25
Air Canada Logo
5:40 am - 10:54 amYXU  London-MCO Orlando
5h 14m1 stop Toronto Pearson Intl
Air Canada Logo
11:55 am - 5:43 pmMCO  Orlando-YXU London
5h 48m1 stop Toronto Pearson Intl
$332Air Canada
Sun, Jan 17 - Sat, Jan 23
Air Canada Logo
5:30 am - 11:13 amYXU  London-MCO Orlando
5h 43m1 stop Toronto Pearson Intl
Air Canada Logo
8:00 am - 2:42 pmMCO  Orlando-YXU London
6h 42m1 stop Toronto Pearson Intl
$347Air Canada
Sun, Sep 20 - Sun, Sep 27
WestJet Logo
5:55 pm - 9:55 pmYXU  London-SFO San Francisco
31h 00m1 stop Calgary
WestJet Logo
6:00 am - 4:45 pmSFO  San Francisco-YXU London
7h 45m1 stop Calgary
$351WestJet
Fri, Oct 2 - Mon, Oct 5
Air Canada Logo
5:40 am - 10:54 amYXU  London-MCO Orlando
5h 14m1 stop Toronto Pearson Intl
Air Canada Logo
11:50 am - 5:45 pmMCO  Orlando-YXU London
5h 55m1 stop Toronto Pearson Intl
$351Air Canada
Fri, Oct 2 - Mon, Oct 5
Air Canada Logo
5:40 am - 10:54 amYXU  London-MCO Orlando
5h 14m1 stop Toronto Pearson Intl
Air Canada Logo
1:55 pm - 9:40 pmMCO  Orlando-YXU London
7h 45m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl
$355Air Canada
Sun, Jan 17 - Sat, Jan 23
Air Canada Logo
9:15 am - 7:36 pmYXU  London-MCO Orlando
10h 21m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
8:00 am - 2:42 pmMCO  Orlando-YXU London
6h 42m1 stop Toronto Pearson Intl
$356Air Canada
Sun, Jan 10 - Fri, Jan 15
Air Canada Logo
5:30 am - 11:13 amYXU  London-MCO Orlando
5h 43m1 stop Toronto Pearson Intl
Air Canada Logo
8:00 am - 2:42 pmMCO  Orlando-YXU London
6h 42m1 stop Toronto Pearson Intl
$357Air Canada
Thu, Nov 12 - Sat, Nov 14
Air Canada Logo
9:15 am - 7:36 pmYXU  London-MCO Orlando
10h 21m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
8:00 am - 2:47 pmMCO  Orlando-YXU London
6h 47m1 stop Toronto Pearson Intl
$358Air Canada
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 $406 (return) on average. On the other hand, the most expensive months are March and December, when the average cost of round-trip tickets is $698 and $542 respectively.

Find deals

Good to know

Low season

May

Cheapest flight

$171
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from London to Orlando Airport

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 11455 reviews
6.3Food
7.8Crew
7.3Boarding
7.1Comfort
6.8Entertainment
Airline reviews

The baggage drop-off for Air Canada in Toronto for passengers flying international was terrible. One of the worst experiences I have ever had. The line was ridiculous; there was no one to help facilitate people avoid confusion, and the baggage system for the line I finally ended up in had to be re-booted right as I got to it.

4.0 OkayAnonymous, Aug 2026
Read more Air Canada reviews

The baggage drop-off for Air Canada in Toronto for passengers flying international was terrible. One of the worst experiences I have ever had. The line was ridiculous; there was no one to help facilitate people avoid confusion, and the baggage system for the line I finally ended up in had to be re-booted right as I got to it.

Flight got canceled. Instead of the booking me for the next flight at night I was booked for the following day at a later time. I was able to fly out that night because I had to call and deal with a human!!!

No charger and no entertainment on the way back. The plane's super old-like 80s old-with zero TVs. At least the free Wi-Fi works, so definitely bring your iPad. Also, no meal on this 7-hour flight.

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.

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)