Cheapest return flights from Seattle to London in May from 467€

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

Return flights

07 May - 11 May Icelandair
06 May - 13 May Icelandair
12 May - 26 May Icelandair
06 May - 19 May Aer Lingus
04 May - 21 May Aer Lingus
13 May - 19 May Aer Lingus
01 May - 12 May Icelandair
12 May - 02 Jun Icelandair
06 May - 19 May Air France direct
13 May - 19 May Air France direct
11 May - 17 May Aer Lingus
31 May - 13 Jun Icelandair
12 May - 02 Jun Air France direct
12 May - 01 Jun Icelandair
19 May - 02 Jun Aer Lingus
12 May - 01 Jun Air France direct
19 May - 02 Jun Air France direct
30 May - 06 Jun Icelandair
28 May - 18 Jun Icelandair
29 May - 05 Jun Icelandair

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

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