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 ￥75,970 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

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
Delta
Sun, Aug 3 - Tue, Aug 19
SEA
Seattle
LHR
London
￥76,140 Roundtrip, found 4 hours ago
￥76,140
Roundtrip
found 4 hours ago
Select Delta flight, departing Sun, Aug 3 from Seattle to London, returning Tue, Aug 19, priced at ￥76,140 found 4 hours ago
Delta
Sun, Aug 3 - Tue, Aug 19
SEA
Seattle
LHR
London
￥76,140 Roundtrip, found 4 hours ago
￥76,140
Roundtrip
found 4 hours ago
Select Delta flight, departing Sun, Aug 3 from Seattle to London, returning Tue, Aug 19, priced at ￥76,140 found 4 hours ago
United
Sun, Aug 3 - Tue, Aug 19
SEA
Seattle
LHR
London
￥76,970 Roundtrip, found 4 hours ago
￥76,970
Roundtrip
found 4 hours ago
Select United flight, departing Sun, Aug 3 from Seattle to London, returning Tue, Aug 19, priced at ￥76,970 found 4 hours ago
American Airlines
Sun, Aug 3 - Tue, Aug 19
SEA
Seattle
LHR
London
￥76,970 Roundtrip, found 4 hours ago
￥76,970
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Sun, Aug 3 from Seattle to London, returning Tue, Aug 19, priced at ￥76,970 found 4 hours ago
Air France
Sun, Aug 3 - Tue, Aug 19
SEA
Seattle
LHR
London
￥83,820 Roundtrip, found 4 hours ago
￥83,820
Roundtrip
found 4 hours ago
Select Air France flight, departing Sun, Aug 3 from Seattle to London, returning Tue, Aug 19, priced at ￥83,820 found 4 hours 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.