Cheapest one-way flights from Seattle to Seoul in September from $531

Best time to book flights for Seattle (SEA) to Seoul (ICN) flights at AirHint

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

One-Way flights

04 Sep Air Canada
25 Sep Air Canada
06 Sep WestJet
13 Sep WestJet
26 Sep Air Canada
04 Sep Asiana Airlines direct
25 Sep Asiana Airlines direct
06 Sep Asiana Airlines direct
13 Sep Asiana Airlines direct
26 Sep Delta direct

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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