YXU

$191 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 8/28. 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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Everything you should know

Cheapest round-trip
$341
WestJet
Sun 8/2Sat 8/8
SFO - YXU • 1 stop
Cheapest one-way
$191
WestJet
Fri 8/28
SEA - YXU • 1 stop
Top routes
Cheapest
Most popular
Insights
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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

 
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

Sun, Aug 2 - Sat, Aug 8
WestJet Logo
6:00 am - 4:45 pm
SFO
-
YXU
7h 45m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$341WestJet
Sat, Aug 8 - Mon, Aug 17
WestJet Logo
1:00 pm - 5:20 am
SFO
-
YXU
13h 20m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$354WestJet
Fri, Aug 7 - Fri, Aug 14
WestJet Logo
1:00 pm - 5:20 am
SFO
-
YXU
13h 20m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$361WestJet
Thu, Oct 29 - Mon, Nov 2
WestJet Logo
7:00 am - 7:15 pm
LAX
-
YXU
9h 15m
1 stop
WestJet Logo
8:00 pm - 10:23 am
YXU
-
LAX
17h 23m
1 stop
$368WestJet
Mon, Aug 17 - Wed, Aug 26
WestJet Logo
6:00 am - 1:50 pm
SFO
-
YXU
28h 50m
2 stops
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$368WestJet
Sat, Aug 8 - Mon, Aug 17
WestJet Logo
6:00 am - 1:50 pm
SFO
-
YXU
28h 50m
2 stops
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$371WestJet
Tue, Oct 27 - Thu, Oct 29
Air Canada Logo
10:55 pm - 9:06 am
LAX
-
YXU
7h 11m
1 stop
Air Canada Logo
3:25 pm - 9:27 pm
YXU
-
LAX
9h 02m
1 stop
$401Air Canada
Tue, Aug 18 - Fri, Aug 21
Air Canada Logo
8:10 am - 9:20 am
SFO
-
YXU
22h 10m
2 stops
Air Canada Logo
10:05 am - 8:51 pm
YXU
-
SFO
13h 46m
2 stops
$403Air Canada
Tue, Oct 27 - Thu, Oct 29
Air Canada Logo
7:20 am - 9:52 pm
LAX
-
YXU
11h 32m
2 stops
Air Canada Logo
9:15 am - 3:34 pm
YXU
-
LAX
9h 19m
1 stop
$407Air Canada
Tue, Aug 4 - Tue, Aug 11
Multiple Airlines Logo
6:30 pm - 5:20 am
BOS
-
YXU
10h 50m
1 stop
Multiple Airlines Logo
2:40 pm - 9:05 am
YXU
-
BOS
18h 25m
2 stops
$564Multiple 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 is the cheapest flight to London?

These are the best round-trip prices found by users searching on KAYAK in the last 5 days.

In the last 5 days, the cheapest flight deal to London was found on the route from Seattle, at $341 return. The most popular connection is from Los Angeles to London and KAYAK users have found round-trip deals for as low as $368 in the last 5 days.

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 United Airlines, WestJet 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$191
Most popular time to fly with an average 36% increase in price.
Flight from Seattle 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

  • What is the cheapest flight to London?

    In the last 5 days, the cheapest flight deal to London was found on the route from Seattle, at $341 return. The most popular connection is from Los Angeles to London and KAYAK users have found round-trip deals for as low as $368 in the last 5 days.

  • 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 airlines 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.
7.2
WestJetOverall score based on 3384 reviews
7.0Comfort
6.2Food
7.9Crew
6.1Entertainment
7.4Boarding
Airline reviews

Westjet was late and we missed our connecting flight with Cathay. Had to wait 8 hours. Westjet only allows 1 checked in baggage for international flights- it’s always been 2. Canada allows only 1 sandwhich bag size full off small liquids. Everything else will be tossed. Awful trip. Will never fly west jet or go to Toronto to connect flights!

2.0 MediocreRosanna, Apr 2026
MCO - YYZ
Read more WestJet reviews

Westjet was late and we missed our connecting flight with Cathay. Had to wait 8 hours. Westjet only allows 1 checked in baggage for international flights- it’s always been 2. Canada allows only 1 sandwhich bag size full off small liquids. Everything else will be tossed. Awful trip. Will never fly west jet or go to Toronto to connect flights!

Everything was good except for flight delay, but it was because of the snow storm in the arrival airport.

The seats very Uncomfortable, no meal and no entertainment for a 4Hours flight. Smooth Flight, Great Take off and landing. Superb crew!

West Jet flight was cancelled and I was not notified. I found out when I tried to check in on-line. Spent 4 hours on the phone with West Jet and Just Fly trying to figure what happened.

Flight was delayed 3 times. Then cancelled due to pilot being timed out. They refused hotel vouchers. Gate attendants were very rude and could not help you at all.

Flight was on time. Online check in capabilities made things quick and easy. Zone boarding was enforced, which I appreciate. Everyone was not lining up ahead of their zone being called. Crew was professional and friendly.

The big lady was sitting right next to me and the button to recline my seat was blocked by her huge arm. No power outlet for chargers. No inflight Wi-Fi movies

Trip was uneventful which is good. Boarding took a long time due to many disabled/elderly requiring assistance which again is fine. Landing and take off were excellent. Food and entertainment were as expected, bring your own if you have preferences otherwise you get what you get.

Okay but not like typical first or business class. On domestic airlines

Our seats that I had paid extra for near the front of the aircraft were no longer available on this replacement aircraft. We were told we either had to accept the new replacement seats in row 27 near the back in seats E and B, no longer together, or sit in the very back in row 30 squeezed into E and F seats that do not recline or have trays that provide a flat platform for a refreshment. This is not what I had expected. However, again your flight crew did the best they could given the circumstances.

737-8 Max is an awful design. Toilets in the rear are inaccessible for most of the flight due to service carts.

Flight was overbooked and seats assigned to multiple passengers. Delay 1 hour to sort out.

Good but I don’t received my bags yet is been 5days still no update

It was a short flight so, everything went smoothly and we got to where we needed to be safely.

No TV on the flight. The charging outlet was not working. No food, even a sandwich. The served orange was poor quality.

Selected seats 5 months prior to date. Had email confirmation and seats were not honoured. Family did not sit together

They did not let us board because one member needed a transit visa, which was not evident at the time of ticket purchase.

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

The flight is very short, may be a little snack can be offered

They canceled my flight last minute, no hotel provided and they rescheduled Sunday night, hope they refunded some money

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.