Cheapest return flights from Seattle to London in May from 591€

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

06 May - 14 May Frontier Airlines
13 May - 28 May Spirit Airlines
05 May - 15 May Icelandair
01 May - 11 May Icelandair
09 May - 25 May Frontier Airlines
19 May - 26 May Icelandair
12 May - 29 May Icelandair
13 May - 29 May Icelandair
11 May - 18 May Icelandair
09 May - 13 May Icelandair
21 May - 18 Jun Icelandair
17 May - 02 Jun Icelandair
19 May - 17 Jun Icelandair
22 May - 01 Jun Icelandair
22 May - 03 Jun Icelandair
30 May - 07 Jun Icelandair
29 May - 09 Jun Icelandair

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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