Find flights
When to book
FAQs

Cheap flights from London, ON to Seattle from C$ 441

YXU — SEA
10 Oct — 17 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from London to Seattle

Wed 21/106:10 a.m. -
1 stop15h 35m
Thu 22/107:35 p.m. -
1 stop6h 45m
Deal found 7/9C$ 506
Tue 8/126:40 a.m. -
1 stop10h 00m
Thu 21/12:30 p.m. -
1 stop12h 05m
Deal found 9/9C$ 510
Tue 8/126:40 a.m. -
1 stop10h 00m
Tue 19/12:30 p.m. -
1 stop12h 05m
Deal found 9/9C$ 518
Thu 22/105:55 p.m. -
1 stop27h 50m
Thu 29/103:30 p.m. -
1 stop12h 05m
Deal found 6/9C$ 555
Mon 7/126:40 a.m. -
1 stop10h 00m
Wed 20/12:30 p.m. -
1 stop12h 05m
Deal found 9/9C$ 575
Wed 9/125:30 a.m. -
2 stops12h 07m
Wed 20/18:15 a.m. -
2 stops10h 32m
Deal found 9/9C$ 647
Mon 7/126:40 a.m. -
1 stop10h 00m
Sat 23/17:08 p.m. -
2 stops31h 27m
Deal found 9/9C$ 660
Mon 7/126:40 a.m. -
1 stop10h 00m
Sun 17/111:00 a.m. -
2 stops15h 35m
Deal found 9/9C$ 663
Tue 8/126:40 a.m. -
1 stop10h 00m
Wed 20/18:44 p.m. -
2 stops29h 51m
Deal found 9/9C$ 673

Find flight deals from London to Seattle

Round-trip from

C$ 506

One-way from

C$ 441
WestJet
  • WestJet
  • 21/10-22/10
  • 2 total stops
  • 22h 20m total
  • London to Seattle
Search Deals
Air Canada
  • Air Canada
  • 8/10-31/12
  • 1 total stop
  • 14h 59m total
  • London to Seattle
Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 8/10

6:10 a.m.-9:48 a.m.

2 stops30h 38m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 473
Quickest round-trip

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 8/10

9:05 a.m.-9:59 p.m.

3 stops15h 54m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 481

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 21/10

6:10 a.m.-6:45 p.m.

1 stop15h 35m

Seattle/Tacoma Intl

Thu 22/10

7:35 p.m.-5:20 a.m.

1 stop6h 45m

C$ 506

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Fri 19/2

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

1 stop10h 00m

Seattle/Tacoma Intl

Thu 25/2

9:50 a.m.-5:35 a.m.

2 stops16h 45m

C$ 710

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 21/10

3:30 p.m.-10:47 p.m.

2 stops10h 17m

Seattle/Tacoma Intl

Thu 22/10

7:55 a.m.-7:40 p.m.

1 stop8h 45m

C$ 738

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Tue 16/2

9:15 a.m.-6:22 p.m.

2 stops12h 07m

Seattle/Tacoma Intl

Sat 27/2

8:15 a.m.-9:47 p.m.

2 stops10h 32m

C$ 749

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Tue 16/2

9:15 a.m.-6:22 p.m.

2 stops12h 07m

Seattle/Tacoma Intl

Mon 22/2

7:05 p.m.-8:37 a.m.

2 stops10h 32m

C$ 749

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 17/2

5:30 a.m.-2:37 p.m.

2 stops12h 07m

Seattle/Tacoma Intl

Sat 27/2

8:15 a.m.-9:47 p.m.

2 stops10h 32m

C$ 749

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Mon 15/2

5:30 a.m.-2:37 p.m.

2 stops12h 07m

Seattle/Tacoma Intl

Tue 23/2

8:15 a.m.-9:47 p.m.

2 stops10h 32m

C$ 749

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Fri 11/12

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

1 stop10h 00m

Seattle/Tacoma Intl

Mon 18/1

7:20 a.m.-5:35 a.m.

2 stops19h 15m

C$ 792

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Sorted by cheapest first

Best time to book a flight from London to Seattle

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

Related info for your journey

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

    Departing from London, Ontario to Seattle will take you 10h. The distance between London, Ontario and Seattle is about 3219 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Seattle 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Kent
Mukilteo
Leavenworth
Tacoma
Renton
Cashmere
Lynnwood
Ellensburg
Tukwila
Olympia
Marysville
Federal Way
Kirkland

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

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

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 Seattle from London today with Cheapflights!

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

Cheapflights helps you find that perfect flight to Seattle from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Certainly. Search results for flights to Seattle from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on London to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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.