Cheapest return flights from Seattle to Seoul in September from $846

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

Return flights

16 Sep - 22 Sep Asiana Airlines direct
02 Sep - 14 Sep Asiana Airlines direct
03 Sep - 25 Sep Korean Air direct

Also check the deals for one-way 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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