Cheapest one-way flights from Seattle to London in January from 194€

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

One-Way flights

26 Jan WestJet
21 Jan WestJet
14 Jan Air Canada
10 Jan WestJet
06 Jan Hawaiian Airlines
04 Jan Lufthansa
26 Jan Virgin Atlantic direct
03 Jan Virgin Atlantic
21 Jan KLM direct
14 Jan Air France direct

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

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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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