Find flights
When to book
FAQs

Cheap flights from Seattle to London, ON from C$ 681

SEA — YXU
24 Nov — 1 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to London

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to London

Wed 9/122:30 p.m. -
1 stop12h 05m
Wed 16/126:40 a.m. -
1 stop10h 00m
Deal found 25/10C$ 989
Sat 14/117:45 a.m. -
1 stop9h 42m
Mon 16/113:25 p.m. -
1 stop8h 34m
Deal found 25/10C$ 1,301
Wed 9/125:35 p.m. -
2 stops25h 17m
Wed 16/125:30 a.m. -
2 stops15h 58m
Deal found 25/10C$ 1,391
Sat 14/117:00 a.m. -
2 stops10h 27m
Mon 16/119:05 p.m. -
3 stops25h 12m
Deal found 25/10C$ 1,480
Thu 5/117:45 a.m. -
1 stop9h 42m
Sun 8/119:05 p.m. -
2 stops20h 32m
Deal found 21/10C$ 1,700
Thu 5/116:30 a.m. -
2 stops10h 57m
Sun 8/119:05 p.m. -
2 stops29h 13m
Deal found 21/10C$ 1,789

Find flight deals from Seattle to London

Round-trip from

C$ 989

One-way from

C$ 681
WestJet
  • WestJet
  • 9/12-16/12
  • 2 total stops
  • 22h 05m total
  • Seattle to London
Search Deals
United Airlines
  • United Airlines
  • 26/12-31/12
  • 2 total stops
  • 22h 52m total
  • Seattle to London
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Seattle to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Sat 26/12

6:45 a.m.-8:37 a.m.

2 stops22h 52m

London

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 681
Quickest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Wed 9/12

2:30 p.m.-5:35 a.m.

1 stop12h 05m

London

Wed 16/12

6:40 a.m.-1:40 p.m.

1 stop10h 00m

C$ 989

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Sat 14/11

7:05 p.m.-2:42 p.m.

2 stops16h 37m

London

Mon 16/11

3:25 p.m.-8:59 p.m.

1 stop8h 34m

C$ 1,301

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Wed 9/12

5:35 p.m.-9:52 p.m.

2 stops25h 17m

London

Wed 16/12

5:30 a.m.-6:28 p.m.

2 stops15h 58m

C$ 1,391

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Sat 14/11

7:00 a.m.-8:27 p.m.

2 stops10h 27m

London

Mon 16/11

9:05 p.m.-7:17 p.m.

3 stops25h 12m

C$ 1,480

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Thu 5/11

6:30 a.m.-8:27 p.m.

2 stops10h 57m

London

Sun 8/11

9:05 p.m.-11:18 p.m.

2 stops29h 13m

C$ 1,789

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/10

Sorted by cheapest first

Best time to book a flight from Seattle to London

Have a flexible travel schedule? Discover the best time to fly to London from Seattle with our price prediction graph.
Estimated round-trip price

Related info for your journey

  • How long is the flight from Seattle to London, Ontario?

    For as low as C$ 1,480, WestJet can have you in London, Ontario from Seattle in 10h 27m. The distance between Seattle and London, Ontario is about 3219 km. This flight may include one or multiple stops.

  • Can I find deals for flights from Seattle to London that include hotel bookings?

    Yes. In addition to deals on Seattle to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to London.

  • Can I find deals for business class flights from Seattle to London?

    Yes. Cheapflights offers flight deals from Seattle to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near London?

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

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

How does Cheapflights help users find flights from Seattle to London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from Seattle today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Seattle to London?

Cheapflights simply makes it quick and affordable to book flights from Seattle to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Seattle to London with no change fees?

Need flexible booking options for your flight to London from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Seattle to London become cheaper?

Not ready to book yet? You can track prices for flights from Seattle to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.