Cheapest return flights from London (LHR) to Seattle (SEA), October

20 dates in October, from $ 556. Book in one tap, or check whether to buy now or wait.

One-wayReturn
Dates, airline, and price
Dates Airline Price
27 Oct 3 Nov Alaska Airlines
Direct Flight
27 Oct 10 Nov Alaska Airlines
Direct Flight
19 Oct 27 Oct Alaska Airlines
Direct Flight
29 Oct 3 Nov Alaska Airlines
Direct Flight
31 Oct 13 Nov Alaska Airlines
Direct Flight
28 Oct 4 Nov Alaska Airlines
Direct Flight
29 Oct 8 Nov Alaska Airlines
Direct Flight
29 Oct 11 Nov Alaska Airlines
Direct Flight
27 Oct 30 Nov Alaska Airlines
Direct Flight
29 Oct 2 Nov Alaska Airlines
Direct Flight
30 Oct 6 Nov Icelandair
18 Oct 25 Oct Alaska Airlines
Direct Flight
20 Oct 27 Oct Alaska Airlines
Direct Flight
20 Oct 28 Oct Alaska Airlines
Direct Flight
15 Oct 29 Oct Alaska Airlines
Direct Flight
22 Oct 27 Oct Alaska Airlines
Direct Flight
22 Oct 29 Oct Alaska Airlines
Direct Flight
20 Oct 25 Oct Alaska Airlines
Direct Flight
21 Oct 25 Oct Alaska Airlines
Direct Flight
22 Oct 26 Oct Alaska Airlines
Direct Flight
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Deals for one-way flights from London to Seattle in October.

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Updated Oct 9, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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