Cheapest one-way flights from Seattle to London in June from $489

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

One-Way flights

15 Jun Icelandair
16 Jun Finnair
29 Jun Icelandair
22 Jun Icelandair
27 Jun Scandinavian Airlines
26 Jun Finnair
15 Jun Alaska Airlines direct
10 Jun Air France direct
22 Jun Alaska Airlines direct
14 Jun Air France direct

Also check the deals for return 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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