Cheapest return flights from Seattle to London in June from 798€

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 June 2025 (see full year).

Return flights

06 Jun - 16 Jun WestJet
15 Jun - 21 Jun WestJet
12 Jun - 23 Jun WestJet
23 Jun - 31 Jul Icelandair
02 Jun - 22 Jun Alaska Airlines
29 Jun - 17 Jul Icelandair
11 Jun - 22 Jun Icelandair
21 Jun - 10 Jul Icelandair
20 Jun - 27 Jun Hawaiian Airlines
27 Jun - 05 Jul Icelandair

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

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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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