Cheapest one-way flights from Seattle to London in June from 377€

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

One-Way flights

22 Jun WestJet
03 Jun WestJet
08 Jun WestJet
20 Jun WestJet
22 Jun Air France direct
21 Jun Air France direct
03 Jun Air France direct
17 Jun Air France direct
08 Jun Air France direct
20 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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