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SEA - YXU

$295 Find Cheap Flights from Seattle 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 from Seattle to London departing on 12/28. 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
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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to London, as well as popular online travel agencies
In the last 7 days travelers have searched 45,682,092 times on KAYAK, and here is why:

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Cheap Flight Deals from Seattle to London (SEA-YXU)

 
These are the cheapest deals for flights from Seattle to London currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. 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 Seattle to London

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Seattle to London.

Recent one-way flight deals from Seattle to London

Only flying one-way? Below are some of the best one-way flight deals from Seattle to London found on KAYAK recently.

Recent last minute flight deals from Seattle to London

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Seattle to London.

Recent direct flight deals from Seattle to London

The latest deals for direct flights from Seattle to London so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Seattle to London

Find recent round-trip train or bus tickets from Seattle to London.

All round-trip flight deals to London

The cheapest plane tickets to London found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
5:45 am - 8:20 pmSEA-YXU
11h 35m2 stops
3:25 pm - 9:20 pmYXU-SEA
8h 55m1 stop
$757Air Canada
Find Deal
Tue, Dec 17 - Tue, Dec 24
7:45 pm - 7:12 pmSEA-YXU
20h 27m2 stops
8:00 pm - 8:45 pmYXU-SEA
27h 45m2 stops
$769WestJet
Find Deal
Sun, Dec 29 - Sun, Jan 5
6:05 am - 8:20 pmSEA-YXU
11h 15m1 stop
3:25 pm - 9:20 pmYXU-SEA
8h 55m1 stop
$775Air Canada
Find Deal
Tue, Dec 17 - Tue, Dec 24
9:55 pm - 7:12 pmSEA-YXU
18h 17m2 stops
8:00 pm - 2:21 pmYXU-SEA
21h 21m1 stop
$784WestJet
Find Deal
Sun, Dec 29 - Sun, Jan 5
5:45 am - 8:20 pmSEA-YXU
11h 35m2 stops
3:25 pm - 10:00 pmYXU-SEA
9h 35m2 stops
$799Air Canada
Find Deal
Tue, Dec 17 - Tue, Dec 24
7:45 pm - 7:12 pmSEA-YXU
20h 27m2 stops
8:00 pm - 2:21 pmYXU-SEA
21h 21m1 stop
$801WestJet
Find Deal
Sun, Dec 29 - Sun, Jan 5
7:45 pm - 7:12 pmSEA-YXU
20h 27m2 stops
8:00 pm - 8:45 pmYXU-SEA
27h 45m2 stops
$817WestJet
Find Deal
Sun, Dec 29 - Sun, Jan 5
5:10 pm - 9:15 amSEA-YXU
13h 05m2 stops
3:25 pm - 3:25 pmYXU-SEA
27h 00m3 stops
$819United Airlines
Find Deal
Tue, Dec 17 - Tue, Dec 24
3:20 pm - 7:12 pmSEA-YXU
24h 52m1 stop
8:00 pm - 2:21 pmYXU-SEA
21h 21m1 stop
$828WestJet
Find Deal
Sun, Dec 29 - Sun, Jan 5
9:25 am - 9:15 amSEA-YXU
20h 50m3 stops
3:25 pm - 3:25 pmYXU-SEA
27h 00m3 stops
$888United Airlines
Find Deal
Tue, Dec 17 - Tue, Dec 24
7:05 pm - 11:20 amSEA-YXU
37h 15m2 stops
$295
Find Deal
Sat, Dec 28
7:45 pm - 7:12 pmSEA-YXU
20h 27m2 stops
$374WestJet
Find Deal
Sun, Dec 29
6:05 am - 8:20 pmSEA-YXU
11h 15m1 stop
$477Air Canada
Find Deal
Sat, Dec 28
6:05 am - 8:20 pmSEA-YXU
11h 15m1 stop
$529United Airlines
Find Deal
Sun, Dec 29
8:20 am - 9:15 amSEA-YXU
21h 55m3 stops
$615United Airlines
Find Deal
Sun, Dec 29
7:20 pm - 8:20 pmSEA-YXU
22h 00m3 stops
$647United Airlines
Find Deal
Sat, Dec 28

Flights from Seattle to London - Travel Insights & Trends

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

What’s the cheapest day of the week to fly from Seattle to London?

The average price of all flights from Seattle to London clicked on KAYAK for each day over the last 12 months.
For Seattle to London, Tuesday is the cheapest day to fly on average and Wednesday is the most expensive. Flying from London back to Seattle, the best deals are generally found on Tuesday, with Monday being the most expensive.

Good to know

Cheapest flight

$295
Flight from Seattle to London

When to book flights from Seattle to London

Are your dates flexible? Find out the best times to travel from Seattle 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. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to London

  • What is the cheapest flight from Seattle to London?

    In the last 3 days, the lowest price for a flight from Seattle to London was $295 for a one-way ticket and $757 for a round-trip.

  • Do I need a passport to fly between Seattle and London?

    Yes

  • Which airports will I be using when flying from Seattle to London?

    Seattle and London are both served by 1 main airport. You will leave Seattle from Seattle/Tacoma Intl and will be arriving at London.

  • Which aircraft models fly most regularly from Seattle to London?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to London?

    Star Alliance is the only airline alliance operating flights between Seattle and London.

  • How does KAYAK find such low prices on flights from Seattle 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 from Seattle to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Seattle 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 Seattle 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 to Seattle with another airline. Booking your flights between Seattle and YXU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle 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 from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from Seattle to London

 
See real verified KAYAK customer reviews for airlines flying from Seattle to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle 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.
7.0
Air CanadaOverall score based on 8198 reviews
6.8Entertainment
7.3Boarding
7.8Crew
6.2Food
7.0Comfort
Airline reviews

Problem with operation of on board entertainment computer. Failed about 1 /2 hour into the flight. Rebooting failed to restore.

8.0 ExcellentWayne, Nov 2024SFO - YYZ
Read more Air Canada reviews

Problem with operation of on board entertainment computer. Failed about 1 /2 hour into the flight. Rebooting failed to restore.

Putting carryone size suitcase into the overhead luggage storage on a the small CR900 plane was cumbersome and its assignment to a far far gate w/o the moveable ramps at YYZ arrivals really stunk.

This flight was a lot more comfortable with more room than the Air Canada Rouge!!! We will never go rouge again! A yes to this one!!! It was so nice to have inflight entertainment! Also the carts came around twice for drinks or a snack!! Great experience all around!

AC flight attendants aren't overly friendly. Otherwise flight was fine.

I’m handicapped and the staff and crew were so kind and helped me board and made sure I was fine during the flight.

The people are great! The trip to Japan is simply never ending!!! Not the problem of the airlines, though.

Friendlier staff who are nice to the elderly who need assistance

Everything went very smoothly and the staff was courteous and friendly. I was really happy and pleased with how well the plane was flown because the departure, descent and landing were really smooth with no sudden drops. The plane’s interior was clean and nice and new in appearance.

Air Canada is the best company I’ve ever flown with. If I had the money, I would only fly with them.

Terrible - flight was flagged for fraudulent payment from being booked via Kayak. Requested to rebook with original credit card or provide new payment. Air Canada stay at JFK did not know how to process new payment. Had to fly from La Guardia 2 1/2 hours later instead with Air Canada.

Book cheap flights from Seattle to London

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to London found on KAYAK in the last 72 hours.
12/28Sat
2 stops
37h 15mSEA-YXU
$295
12/29Sun
2 stopsWestJet
20h 27mSEA-YXU
$374
12/28Sat
1 stopAir Canada
11h 15mSEA-YXU
$477
12/29Sun
1 stopUnited Airlines
11h 15mSEA-YXU
$529
12/29Sun
3 stopsUnited Airlines
21h 55mSEA-YXU
$615
12/28Sat
3 stopsUnited Airlines
22h 00mSEA-YXU
$647

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Everything you need to know for your flight from Seattle to London

Information on your arrival and departure airports

London (YXU)
Seattle (SEA)