Cheapest return flights from Seattle to London in June from $861

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

Return flights

02 Jun - 14 Jun Alaska Airlines
16 Jun - 22 Jul Icelandair
05 Jun - 15 Jun jetBlue
26 Jun - 05 Jul WestJet
19 Jun - 03 Jul WestJet
03 Jun - 27 Jun Alaska Airlines
06 Jun - 27 Jun Alaska Airlines
04 Jun - 27 Jun Icelandair
11 Jun - 25 Jun Icelandair
24 Jun - 09 Jul Icelandair
24 Jun - 08 Jul Icelandair
25 Jun - 18 Jul Alaska Airlines

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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