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Cheap flights from Seattle to London, ON from C$ 291

SEA — YXU
9 Oct — 16 Oct1
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

Fri 23/107:35 p.m. -
1 stop6h 45m
Fri 30/107:40 a.m. -
1 stop10h 00m
Deal found 8/9C$ 548
Tue 20/107:35 p.m. -
1 stop6h 45m
Sat 24/106:10 a.m. -
1 stop15h 35m
Deal found 8/9C$ 575
Tue 20/108:36 p.m. -
2 stops29h 44m
Tue 27/107:40 a.m. -
1 stop10h 00m
Deal found 4/9C$ 599
Fri 23/1010:30 a.m. -
1 stop15h 50m
Fri 30/107:40 a.m. -
2 stops13h 51m
Deal found 8/9C$ 717
Sun 4/1010:30 a.m. -
1 stop15h 50m
Sun 11/105:55 p.m. -
1 stop27h 50m
Deal found 5/9C$ 756
Fri 23/105:50 a.m. -
2 stops8h 53m
Fri 30/103:25 p.m. -
2 stops21h 02m
Deal found 8/9C$ 863
Tue 20/107:55 a.m. -
1 stop8h 45m
Sat 24/109:05 a.m. -
2 stops12h 27m
Deal found 4/9C$ 942

Find flight deals from Seattle to London

Round-trip from

C$ 548

One-way from

C$ 291
WestJet
  • WestJet
  • 23/10-30/10
  • 2 total stops
  • 16h 45m total
  • Seattle to London
Search Deals
WestJet
  • WestJet
  • 30/11-31/12
  • 1 total stop
  • 12h 05m 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
Quickest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Mon 30/11

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

1 stop12h 05m

London

Wed 31/12

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

Nonstop0h 00m

C$ 291

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Mon 30/11

10:03 a.m.-5:35 a.m.

3 stops16h 32m

London

Wed 31/12

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

Nonstop0h 00m

C$ 418

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Fri 23/10

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

1 stop6h 45m

London

Fri 30/10

7:40 a.m.-2:40 p.m.

1 stop10h 00m

C$ 548

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Tue 20/10

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

1 stop6h 45m

London

Sat 24/10

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

1 stop15h 35m

C$ 575

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Sun 4/10

10:30 a.m.-5:20 a.m.

1 stop15h 50m

London

Sun 11/10

5:55 p.m.-6:45 p.m.

1 stop27h 50m

C$ 756

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Tue 20/10

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

1 stop8h 45m

London

Sat 24/10

9:05 a.m.-6:32 p.m.

2 stops12h 27m

C$ 942

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Tue 20/10

9:24 a.m.-5:20 a.m.

2 stops16h 56m

London

Tue 27/10

7:40 a.m.-5:00 p.m.

2 stops12h 20m

C$ 965

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Tue 20/10

7:25 p.m.-9:40 p.m.

2 stops23h 15m

London

Tue 27/10

3:25 p.m.-9:40 a.m.

2 stops21h 15m

C$ 992

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

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$ 548, WestJet can have you in London, Ontario from Seattle in 6h 45m. The distance between Seattle and London, Ontario is about 3219 km.

  • 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

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