Cheapest one-way flights from Seattle to London in May from $335

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

One-Way flights

05 May WestJet
26 May WestJet
07 May WestJet
11 May jetBlue
11 May Air France direct
17 May Air France direct
05 May British Airways direct
07 May Air France direct
16 May British Airways direct
26 May Air France direct

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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