Flights to South London from Seattle - ￥27,326

View ￥27,326 flight on Wed, Oct 8, 2025Opens in a new window

Popular airlines from Seattle to South London

  • Icelandair

    Icelandair

  • American Airlines

    American Airlines

  • Air Canada

    Air Canada

  • British Airways

    British Airways

  • Delta

    Delta

  • KLM

    KLM

  • Lufthansa

    Lufthansa

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Cheap Flights from Seattle to South London (SEA-LON)

Prices were available within the past 7 days and start at ￥27,326 for one-way flights and ￥73,220 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Oct 22 - Wed, Oct 29
SEA
Seattle
LHR
London
￥73,220 Roundtrip, found 6 days ago
￥73,220
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 22 from Seattle to London, returning Wed, Oct 29, priced at ￥73,220 found 6 days ago
Air Canada
Wed, Oct 22 - Wed, Oct 29
SEA
Seattle
LHR
London
￥75,410 Roundtrip, found 6 days ago
￥75,410
Roundtrip
found 6 days ago
Select Air Canada flight, departing Wed, Oct 22 from Seattle to London, returning Wed, Oct 29, priced at ￥75,410 found 6 days ago
Icelandair
Mon, Dec 1 - Wed, Dec 10
SEA
Seattle
LGW
London
￥75,970 Roundtrip, found 2 days ago
￥75,970
Roundtrip
found 2 days ago
Select Icelandair flight, departing Mon, Dec 1 from Seattle to London, returning Wed, Dec 10, priced at ￥75,970 found 2 days ago
American Airlines
Sun, Aug 3 - Tue, Aug 19
SEA
Seattle
LHR
London
￥76,200 Roundtrip, found 1 day ago
￥76,200
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Aug 3 from Seattle to London, returning Tue, Aug 19, priced at ￥76,200 found 1 day ago
British Airways
Wed, Oct 22 - Wed, Oct 29
SEA
Seattle
LHR
London
￥78,070 Roundtrip, found 6 days ago
￥78,070
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, Oct 22 from Seattle to London, returning Wed, Oct 29, priced at ￥78,070 found 6 days ago
Air France
Mon, Dec 1 - Wed, Dec 10
SEA
Seattle
LHR
London
￥87,600 Roundtrip, found 2 days ago
￥87,600
Roundtrip
found 2 days ago
Select Air France flight, departing Mon, Dec 1 from Seattle to London, returning Wed, Dec 10, priced at ￥87,600 found 2 days ago

Find the cheapest month to fly from Seattle (SEA) to London (LHR)

October is typically the cheapest month to fly

From ￥72,739 - ￥127,530 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.