Cheapest return flights from Seattle to London in June from $773

AirHint found the following cheapest return flights from Seattle (SEA) to London (LGW) in June 2025 (see full year).

Return flights

25 Jun - 09 Jul Scandinavian Airlines
08 Jun - 15 Jun Icelandair
25 Jun - 11 Jul jetBlue
25 Jun - 10 Jul jetBlue
17 Jun - 26 Jun Turkish Airlines
11 Jun - 27 Jun Turkish Airlines
06 Jun - 14 Jun Icelandair
27 Jun - 04 Jul Frontier Airlines
25 Jun - 28 Jun Spirit Airlines
08 Jun - 14 Jun Icelandair
12 Jun - 16 Jun Turkish Airlines
21 Jun - 26 Jun Frontier Airlines
30 Jun - 12 Jul Hawaiian Airlines
28 Jun - 10 Jul Frontier Airlines
26 Jun - 02 Jul Frontier Airlines
25 Jun - 12 Jul Scandinavian Airlines
19 Jun - 23 Jun Icelandair
09 Jun - 16 Jun Air France
26 Jun - 10 Jul Spirit Airlines
26 Jun - 08 Jul Frontier 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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