Cheapest one-way flights from Seattle to London in October from $260

Best time to book flights for Seattle (SEA) to London (LHR) flights at AirHint

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

One-Way flights

12 Oct Icelandair
15 Oct Icelandair
21 Oct Icelandair
01 Oct Icelandair
27 Oct Icelandair
11 Oct Icelandair
17 Oct Icelandair
04 Oct Icelandair
12 Oct British Airways direct
15 Oct British Airways direct

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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