$156 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 5/14. 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

KAYAK searches hundreds of travel sites at once for deals on flights to the United States

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Useful Info
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
Newark1 stop$381
Los Angeles
Los Angeles1 stop$275
Las Vegas
Las Vegas2 stops$277
Miami
Miami2 stops$362
San Francisco
San Francisco1 stop$358
Boston
Boston2 stops$463
Seattle
Seattle1 stop$266
Fort Lauderdale
Fort Lauderdale2 stops$296
Tampa
Tampa2 stops$299
San Diego
San Diego1 stop$313
New York
Newark1 stop$381
Los Angeles
Los Angeles1 stop$275
Las Vegas
Las Vegas2 stops$277
Miami
Miami2 stops$362
San Francisco
San Francisco1 stop$358
Boston
Boston2 stops$463
Seattle
Seattle1 stop$266
Fort Lauderdale
Fort Lauderdale2 stops$296
Tampa
Tampa2 stops$299
San Diego
San Diego1 stop$313

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.

Recent round-trip flight deals from London to the United States

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from London to the United States.
Discover the best prices for you by selecting your travel dates on KAYAK.
WestJet Logo
6:00 am - 2:12 pmYXU-LAX
11h 12m1 stop
WestJet Logo
6:05 pm - 5:14 amLAX-YXU
8h 09m1 stop
$275WestJet
Find Deal
Tue, Jul 22 - Sun, Jul 27
United Airlines Logo
3:45 pm - 12:27 amYXU-LAS
11h 42m2 stops
United Airlines Logo
10:30 pm - 3:03 pmLAS-YXU
13h 33m2 stops
$277United Airlines
Find Deal
Tue, May 27 - Fri, May 30
WestJet Logo
6:00 am - 8:21 pmYXU-LAS
17h 21m2 stops
WestJet Logo
6:20 pm - 5:14 amLAS-YXU
7h 54m1 stop
$293WestJet
Find Deal
Tue, May 27 - Thu, May 29
WestJet Logo
6:00 am - 5:35 pmYXU-LAS
14h 35m1 stop
WestJet Logo
6:20 pm - 5:14 amLAS-YXU
7h 54m1 stop
$296WestJet
Find Deal
Tue, May 27 - Thu, May 29
WestJet Logo
8:00 pm - 12:33 pmYXU-LAS
19h 33m2 stops
WestJet Logo
1:25 pm - 5:14 amLAS-YXU
12h 49m2 stops
$298WestJet
Find Deal
Tue, May 27 - Thu, May 29
WestJet Logo
6:00 am - 2:12 pmYXU-LAX
11h 12m1 stop
WestJet Logo
12:35 pm - 5:14 amLAX-YXU
13h 39m2 stops
$298WestJet
Find Deal
Tue, Jul 22 - Sun, Jul 27
Air Canada Logo
6:15 am - 2:57 pmYXU-LAS
11h 42m2 stops
Air Canada Logo
6:55 pm - 9:18 amLAS-YXU
11h 23m2 stops
$308Air Canada
Find Deal
Sat, May 31 - Mon, Jun 2
Air Canada Logo
9:55 am - 2:33 pmYXU-LAX
7h 38m1 stop
Air Canada Logo
12:08 am - 2:57 pmLAX-YXU
11h 49m2 stops
$317Air Canada
Find Deal
Thu, Aug 7 - Sun, Aug 10
 Logo
6:15 am - 5:59 pmYXU-MCO
11h 44m2 stops
 Logo
6:30 am - 2:59 pmMCO-YXU
8h 29m1 stop
Thu, Jun 5 - Tue, Jun 10
 Logo
8:00 pm - 5:51 pmYXU-LAS
24h 51m2 stops
 Logo
7:30 pm - 5:14 amLAS-YXU
30h 44m3 stops
Tue, May 27 - Thu, May 29
Useful Info

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 July, when tickets cost $416 (return) on average. On the other hand, the most expensive months are December and August, when the average cost of round-trip tickets is $522 and $478 respectively.


Good to know

Low seasonSeptember
High seasonMarch
Cheapest flight$156
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 11% 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.

  • 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.

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.
7.0
Air CanadaOverall score based on 9245 reviews
6.3Food
7.0Comfort
7.8Crew
6.8Entertainment
7.3Boarding
Airline reviews

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 .

2.0 MediocreAnonymous, Apr 2025YYZ - IAD
Read more Air Canada reviews

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! 😊

I paid for a comfort class seat and was seated in economy.

My plane was cancelled and had to be rebook for the evening was not happy.

The flight was cancelled and we had to rebook on Porter to make our cruise the next day. Air Canada has not compensated. We won’t be flying with them again. This is the second time this has happened. Also the return flight was delayed 2 hours who knows why.

Separated me and my wife and wife’s sister in far apart different seats even though I booked them all together. Just scams after scams to make us pay more. Worst airline

If you want your flight to get delayed constantly for 13+ hours and given a 10 dollar food voucher the. I would say take air canada. Worst experience ever.

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.

The crew of this flight, specially the flight attendant in the front were the sweetest I’ve had in all my life, I genuinely hope they get a race or sum cuz of their efforts. It was just quite unsettling that the flight took so long to departure. It was supposed to leave at 10:35pm and we ended up taking off at 11:22pm…👎🏻👎🏻👎🏻

It’s bare bones but was on time so can’t complain.

Of all the countries I've flown to and airlines from around the world, I have never had such a dismissive an arrogant employee during boarding. After waiting in line for 20 minutes to board, I was sent to a second line for Passport verification. Natalie from Flair, repeatedly tried to scan my passport which didn't work for some reason but was too lazy to input my information manually. Bar code scanners aren't 100% reliable as we all know. She asked me my birthdate 3 times, made me wait to be the last person aboard and then smugly threatened me that my only bag could be charged for (same backpack I used as on my arrival as carry on). Natalie working in Ft. Lauderdale and the was the epitome of lobotomized tiktok brain with the charm of junk mail.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.