Cheapest one-way flights from Seattle to London in April from 245€

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

One-Way flights

19 Apr WestJet
16 Apr WestJet
12 Apr Air Canada
22 Apr Alaska Airlines
03 Apr Hawaiian Airlines
12 Apr Virgin Atlantic direct
19 Apr Air France direct
22 Apr Air France direct
16 Apr Virgin Atlantic direct
03 Apr Virgin Atlantic direct

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

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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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