Cheapest return flights from Seattle (SEA) to London (LHR), May

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
18 May 23 May Icelandair
23 May 11 Jun Air Canada
23 May 29 May Scandinavian Airlines
01 May 30 Jun Turkish Airlines
18 May 23 May British Airways
Direct Flight
01 May 30 Jun British Airways
Direct Flight
27 May 01 Jun Icelandair
27 May 31 May Icelandair
23 May 29 May British Airways
Direct Flight
27 May 01 Jun British Airways
Direct Flight
27 May 31 May British Airways
Direct Flight
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deals for one-way flights from Seattle to London in May.

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Updated Jul 14, 2026.

About these fares

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