Cheapest return flights from Seattle to London in May from 595€

AirHint found the following cheapest return flights from Seattle (SEA) to London (STN) in May 2026 (see full year).

Return flights

04 May - 30 May Icelandair
22 May - 31 May Icelandair
09 May - 23 May Turkish Airlines
22 May - 01 Jun Scandinavian Airlines
07 May - 30 May Turkish Airlines
24 May - 30 May Icelandair
08 May - 30 May Turkish Airlines
31 May - 20 Jun Alaska Airlines

Also check the deals for one-way flights from Seattle to London in May.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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