Cheapest one-way flights from Seattle to Seoul in September from 326€

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

One-Way flights

09 Sep Alaska Airlines
23 Sep Alaska Airlines
27 Sep Asiana Airlines direct
25 Sep Asiana Airlines direct
26 Sep Asiana Airlines direct
29 Sep Alaska Airlines
23 Sep Asiana Airlines direct
10 Sep Air Canada
02 Sep Air Canada
11 Sep Air Canada

Also check the deals for return flights from Seattle to Seoul in September.

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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