Cheapest return flights from Seattle to London in June from $830

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

Return flights

03 Jun - 10 Jun Icelandair
08 Jun - 15 Jun Icelandair
18 Jun - 25 Jun Icelandair
23 Jun - 04 Jul Icelandair
21 Jun - 25 Jun Icelandair
19 Jun - 26 Jun Icelandair
23 Jun - 30 Jun Icelandair
13 Jun - 27 Jun Icelandair
29 Jun - 06 Jul Icelandair
13 Jun - 20 Jun Icelandair
25 Jun - 23 Jul Icelandair
13 Jun - 21 Jun Aer Lingus
29 Jun - 06 Jul British Airways direct
21 Jun - 25 Jun American Airlines direct

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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