$144 Find Cheap Flights to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to London departing on 4/27. 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

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$302
WestJet
Thu 4/16Thu 4/23
SEA - YXU • 1 stop
Cheapest one-way
$144
WestJet
Mon 4/27
LAX - YXU • 1 stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Economy Plus offers six extra inches of legroom.
WestJet's Extended Comfort seats include priority boarding.
Expert advice
Expert advice
Expert advice
Expert advice
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to London!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights to London (YXU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights to London 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 to London

Thu, Apr 16 - Thu, Apr 23
WestJet Logo
3:10 pm - 6:35 am
SEA
-
YXU
12h 25m
1 stop
WestJet Logo
8:00 am - 2:19 pm
YXU
-
SEA
9h 19m
1 stop
$302WestJet
Mon, May 25 - Thu, May 28
WestJet Logo
5:30 pm - 5:20 am
ORD
-
YXU
10h 50m
1 stop
WestJet Logo
6:10 am - 4:40 pm
YXU
-
ORD
11h 30m
1 stop
$306WestJet
Mon, Apr 20 - Mon, Apr 27
WestJet Logo
11:55 am - 6:35 am
SEA
-
YXU
15h 40m
2 stops
WestJet Logo
6:10 am - 6:45 pm
YXU
-
SEA
15h 35m
1 stop
$361WestJet
Mon, Apr 20 - Mon, Apr 27
WestJet Logo
3:10 pm - 6:35 am
SEA
-
YXU
12h 25m
1 stop
WestJet Logo
6:10 am - 9:40 am
YXU
-
SEA
30h 30m
1 stop
$375WestJet
Mon, Apr 20 - Mon, Apr 27
Air Canada Logo
8:00 pm - 8:44 am
SEA
-
YXU
9h 44m
2 stops
Air Canada Logo
5:40 pm - 9:38 am
YXU
-
SEA
18h 58m
2 stops
$432Air Canada
Sun, Apr 19 - Sun, Apr 26
Air Canada Logo
6:30 am - 5:04 pm
EWR
-
YXU
10h 34m
2 stops
Air Canada Logo
5:10 am - 10:18 am
YXU
-
EWR
5h 08m
1 stop
$445Air Canada
Sat, May 2 - Sun, May 10
Multiple Airlines Logo
7:21 pm - 5:20 am
ORD
-
YXU
32h 59m
2 stops
Multiple Airlines Logo
6:10 am - 4:40 pm
YXU
-
ORD
11h 30m
1 stop
$449Multiple Airlines
Mon, Apr 20 - Mon, Apr 27
Multiple Airlines Logo
5:20 am - 6:35 am
ORD
-
YXU
24h 15m
2 stops
Multiple Airlines Logo
6:10 am - 4:40 pm
YXU
-
ORD
11h 30m
1 stop
$550Multiple Airlines
Wed, Apr 22 - Wed, Apr 29
United Airlines Logo
4:25 pm - 9:19 pm
PHL
-
YXU
4h 54m
1 stop
United Airlines Logo
5:40 pm - 10:43 pm
YXU
-
PHL
5h 03m
1 stop
$779United Airlines
Tue, Apr 21 - Tue, Apr 28
United Airlines Logo
9:15 am - 5:04 pm
PHL
-
YXU
7h 49m
1 stop
United Airlines Logo
5:40 pm - 10:43 pm
YXU
-
PHL
5h 03m
1 stop
$804United Airlines
Booking Insights

KAYAK's insights & trends for flights to London

Get data-powered insights and trends for flights to London to help you find the cheapest flights, the best time to fly and much more.

What are the most popular airlines flying to London?

The most popular airline among KAYAK users flying to London is Air Canada, followed by Porter Airlines and United Airlines.

Expert advice

Expert advice for your flight to London

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on WestJet, United Airlines and Air Canada

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know - Book Cheap London Plane Tickets

Cheapest flight$144
Flight from Los Angeles to London

When to book flights to London

Are your dates flexible? Find out the best times to travel to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. The information is for flights to London based on your location. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs - booking London flights

  • How far is London Airport from central London?

    There are 5 miles between London city center and London Airport.

  • What is the name of London’s airport?

    There is only 1 airport in London, called London Airport (YXU). It can also be referred to as London or London Intl.

  • How does KAYAK find such low prices on flights to London?

    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 to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to London?

    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 to London 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 to London?

    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 to London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to London

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest London flight deals.

Reviews of the top airline flying to London

 
See real verified KAYAK customer reviews for airlines flying to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from the United States to London. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to London? 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 10800 reviews
7.8Crew
6.3Food
7.1Comfort
7.3Boarding
6.8Entertainment
Airline reviews

I want to thank Carlos at the Miami AC desk - he was amazing and went over and above to help us out. Thank you Carlos and all the best to you!!! You made our faith in AC feel great! Sincerely, David Cubitt

10.0 ExcellentAnonymous, Mar 2026
MIA - YYZ
Read more Air Canada reviews

I want to thank Carlos at the Miami AC desk - he was amazing and went over and above to help us out. Thank you Carlos and all the best to you!!! You made our faith in AC feel great! Sincerely, David Cubitt

Flight was canceled due to mechanical issues. After a considerable wait in the queue, Air Canada customer service was very helpful to get us on another flight. I am disappointed to report our rescheduled flight is for three days from now. Three days of extra expenses and inconvenience is unacceptable.

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

Had to cancel the flight because there was a 14 hour layover before the flight. Unacceptable.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

The flight left late and I didn’t get a glass of bubbly upon boarding (which I’m used to when booking business class on other flights), but otherwise it was a pleasant flight with lovely, helpful crew members and I enjoyed my meal.

Flight was canceled for a reason they knew hours before but did not mention. Next the gate chnage from 37 to 38 at least 10 times. Ridiculous.

It was just fine. I managed to make all my connection too sbut had trouble in Munich with no wheel chair and trouble trying to get help from the airport people to get to the other terminal for my flight. Finally a wonderful lady Amelia, helped me to make my flight connection Timon with zero time to spare.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend

Everything you need to know for your flight to London

Flights with popular airlines flying to London

Flights from the other most popular airlines that fly from the United States to London according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.