$164 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 8/14. 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

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Flights Deals

Best United States Flight Deals from London

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
New York
New York2 stops$385
Los Angeles
Los Angeles2 stops$285
Las Vegas
Las Vegas2 stops$302
Miami
Miami2 stops$384
San Francisco
San Francisco1 stop$426
Boston
Boston1 stop$480
Fort Lauderdale
Fort Lauderdale2 stops$442
Tampa
Tampa1 stop$349
New York
New York2 stops$385
Los Angeles
Los Angeles2 stops$285
Las Vegas
Las Vegas2 stops$302
Miami
Miami2 stops$384
San Francisco
San Francisco1 stop$426
Boston
Boston1 stop$480
Fort Lauderdale
Fort Lauderdale2 stops$442
Tampa
Tampa1 stop$349

Cheap Flights from London to the United States

 
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 14 - Thu, Aug 21
 Logo
9:55 am - 7:40 pmYXU-LAX
12h 45m2 stops
 Logo
12:35 pm - 5:14 amLAX-YXU
13h 39m2 stops
Thu, Aug 14 - Thu, Aug 21
Air Canada Logo
3:40 pm - 9:00 pmYXU-LAX
8h 20m1 stop
Air Canada Logo
4:00 pm - 9:17 amLAX-YXU
14h 17m1 stop
$291Air Canada
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Tue, Aug 12 - Tue, Aug 19
WestJet Logo
6:00 am - 9:47 pmYXU-LAX
18h 47m1 stop
WestJet Logo
7:00 am - 7:09 pmLAX-YXU
9h 09m1 stop
$294WestJet
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Mon, Aug 11 - Mon, Aug 18
WestJet Logo
6:00 am - 4:31 pmYXU-LAS
13h 31m2 stops
WestJet Logo
6:20 pm - 5:14 amLAS-YXU
7h 54m1 stop
$302WestJet
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Wed, Aug 13 - Wed, Aug 20
WestJet Logo
6:00 am - 2:12 pmYXU-LAX
11h 12m1 stop
WestJet Logo
6:05 pm - 5:14 amLAX-YXU
8h 09m1 stop
$304WestJet
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Thu, Aug 14 - Wed, Aug 20
United Airlines Logo
6:15 am - 10:30 amYXU-LAX
7h 15m1 stop
United Airlines Logo
12:56 am - 3:02 pmLAX-YXU
11h 06m2 stops
$308United Airlines
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Wed, Aug 13 - Wed, Aug 20
WestJet Logo
6:00 am - 2:12 pmYXU-LAX
11h 12m1 stop
WestJet Logo
12:35 pm - 5:14 amLAX-YXU
13h 39m2 stops
$309WestJet
Find Deal
Tue, Aug 12 - Tue, Aug 19
Air Canada Logo
9:55 am - 2:43 pmYXU-LAX
7h 48m1 stop
Air Canada Logo
11:50 am - 9:27 pmLAX-YXU
6h 37m1 stop
$312Air Canada
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Thu, Aug 14 - Wed, Aug 20
United Airlines Logo
6:15 am - 4:26 pmYXU-LAX
13h 11m2 stops
United Airlines Logo
12:56 am - 3:02 pmLAX-YXU
11h 06m2 stops
$313United Airlines
Find Deal
Mon, Aug 11 - Mon, Aug 18
WestJet Logo
6:00 am - 5:35 pmYXU-LAS
14h 35m1 stop
WestJet Logo
6:20 pm - 5:14 amLAS-YXU
7h 54m1 stop
$314WestJet
Find Deal
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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.

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 July, when tickets cost $429 (return) on average. On the other hand, the most expensive months are August and December, when the average cost of round-trip tickets is $525 and $522 respectively.


Good to know

Low seasonMay
High seasonMarch
Cheapest flight$164
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from London to Los Angeles

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.

  • What is the cheapest time of day to fly to the United States?

    The cheapest time of day to fly to the United States is generally in the morning, when round-trip flights cost $408 on average. Morning departures are around 4% cheaper than evening flights, on average. The most expensive time of day to fly to the United States is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $482.

Reviews of the top airlines 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 9654 reviews
7.3Boarding
6.8Entertainment
6.3Food
7.1Comfort
7.8Crew
Airline reviews

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

2.0 MediocreAnonymous, Jun 2025YYZ - DEN
Read more Air Canada reviews

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

This was an excellent experience for a very short flight.

No space in overhead bin, one cookie, 2 oz of juice - is not customer service.

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

The ground staff was so rude in Toronto airport ...very rude and did not answer simple questions, and made me look like a fool. Very rude ground staff.

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

I had a nice flight with free wifi. So I was able to message family members and stream music during my flight, which made the trip go by fast. I also enjoyed flying on there Airbus A220. The plane looked very new and it also got up to speed fast down the runway and didn't need much runway to get airborne.

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

All was fine. Weather was a bit stormy, but nothing kayak can do about that! 😊

Very bead I am going to Vancouver to toronto. Not boarding receive. Before flight ✈️ time I have to take boarding. Boarding manager asking me pay $89 . Just flight ✈️ time before I pay .after provided the Boarding pass. Flair Airlines management not good. But kayak is best application.

Not good Even after I made my booking, I was charged $90 for my boarding pass. I have collected boarding pass i pay $90 near . Flair airline not good. Without pay no boarding pass.

The flight was smooth, but the seats are not comfortable. I was not able to sleep. The sizes for the personal item and carry-on are way smaller than other airlines.

Leg room was terrible and seats very narrow. Flight was also delayed.

The worst airline experience that I ever had in my life. The fare was cheap but boy do you pay for it when it comes to baggages, carry-ons, food on board and lack of available staff at check-in. Almost every other passenger on my flight had the same complaints and experience. We all bonded discussing our displeasure. My husband and I will definitely not be traveling with Flair Airlines. We'll take anyone else.

The most uncomfortable plane I ever fly on. The seats won't even recline a little. For a 5 hrs flight at night and tired it felt like torture

Seats in 1 res are dispersed all over the plane, even child was across

Personally, I will not use this fight again. The service is poor, you have to buy even water. They don't provide anything even sneak, you have to buy. They said Personally items for 7 kg. Then they use some measurements, if you have 7kg and if it's not getting inside of their measurements, you have to pay 80$ this is robbery. I will prefer other flight then this. I am désappointement taking this airplane.

It’s a shameful company. It ask as to go to counter to take the boarding pass, they simply send it by email, just to check the bags’ size in a smaller than normal template. DONT USE FLAIR! It will be more expensive than normal airlines at the end.

flight was okay, no wifi, no free drinks but worst of all they lost my son's bike for four days. Customer service was nonexistent - call a number that leaves you on perpetual hold, there's no baggage folks in the baggage claims area (in vancouver). we went up to international and nobody was at ticketing, went to domestic and they had us fill out a form. they could not tell us where the bag was. Anyway, highly recommend you drop an airtag for anything that's worth more than $500. My son's bike costs a lot more than that to replace; I was on pins and needles for four days.

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

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