Cheapest return flights from Seattle to London in April from 573€

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

Return flights

02 Apr - 25 Apr Icelandair
18 Apr - 25 Apr Icelandair
17 Apr - 25 Apr Icelandair
05 Apr - 13 Apr Icelandair
01 Apr - 10 Apr Icelandair
02 Apr - 12 Apr Icelandair
18 Apr - 28 Apr Turkish Airlines
02 Apr - 18 Apr Turkish Airlines
29 Apr - 10 May Icelandair
10 Apr - 21 Apr Aer Lingus
22 Apr - 16 May Turkish Airlines

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

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