Cheapest one-way flights from Seattle to Seoul in October from $437

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

One-Way flights

20 Oct Japan Airlines
27 Oct Japan Airlines
19 Oct Japan Airlines
12 Oct Philippine Airlines
01 Oct Hawaiian Airlines
11 Oct Hawaiian Airlines
24 Oct Alaska Airlines
04 Oct Frontier Airlines
13 Oct China Airlines
18 Oct Hawaiian Airlines

Also check the deals for return flights from Seattle to Seoul 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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