Cheapest return flights from Seattle to London in May from 634€

Best time to book flights for Seattle (SEA) to London (LGW) flights at AirHint

AirHint found the following cheapest return flights from Seattle (SEA) to London (LGW) in May 2025 (see full year).

Return flights

04 May - 11 May Icelandair
15 May - 22 May Icelandair
13 May - 20 May Icelandair
11 May - 18 May Icelandair
22 May - 26 May Icelandair
22 May - 29 May Icelandair

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

Skyscanner

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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