Cheapest one-way flights from Seattle to London in May from 248€

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 May 2025 (see full year).

One-Way flights

03 May Frontier Airlines
01 May Frontier Airlines
06 May Frontier Airlines
14 May Alaska Airlines
18 May Alaska Airlines
09 May Spirit Airlines
08 May Alaska Airlines
05 May Alaska Airlines
28 May WestJet
23 May jetBlue

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

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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