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

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 April 2025 (see full year).

Return flights

25 Apr - 09 May Icelandair
01 Apr - 12 Apr Icelandair
02 Apr - 09 Apr Aer Lingus
29 Apr - 22 May Icelandair
29 Apr - 21 May Icelandair
01 Apr - 07 Apr Icelandair
10 Apr - 17 Apr Icelandair
03 Apr - 10 Apr Turkish Airlines
04 Apr - 12 Apr Icelandair
03 Apr - 11 Apr Icelandair

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

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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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