Cheapest one-way flights from Seattle to Seoul in September from $351

AirHint found the following cheapest one-way flights from Seattle (SEA) to Seoul (ICN) in September 2026 (see full year).

One-Way flights

15 Sep Cathay Pacific
16 Sep Cathay Pacific
21 Sep Cathay Pacific
14 Sep Cathay Pacific
15 Sep Asiana Airlines direct
16 Sep Asiana Airlines direct
21 Sep Asiana Airlines direct
26 Sep Asiana Airlines direct
14 Sep Asiana Airlines direct
27 Sep EVA Air

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

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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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