Cheapest return flights from Seattle to London in June from 737€

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

Return flights

21 Jun - 29 Jun Scandinavian Airlines
07 Jun - 30 Jun Scandinavian Airlines
17 Jun - 11 Jul United
21 Jun - 29 Jun British Airways direct
17 Jun - 11 Jul British Airways 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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