Cheapest one-way flights from Seattle to London in June from 399€

Best time to book flights for Seattle (SEA) to London (LGW) flights at AirHint

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

One-Way flights

13 Jun WestJet
19 Jun WestJet
18 Jun Alaska Airlines
07 Jun jetBlue
04 Jun WestJet
21 Jun Alaska Airlines

Also check the deals for return flights from Seattle to London in June.

Skyscanner

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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