Cheapest one-way flights from Seattle to London in October from $223

AirHint found the following cheapest one-way flights from Seattle (SEA) to London (LGW) in October 2025 (see full year).

One-Way flights

23 Oct jetBlue
18 Oct Frontier Airlines
24 Oct Frontier Airlines
06 Oct Hawaiian Airlines
15 Oct Hawaiian Airlines
04 Oct Hawaiian Airlines
01 Oct Frontier Airlines
10 Oct Frontier Airlines
16 Oct WestJet
17 Oct Frontier Airlines

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

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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