Cheapest return flights from Seoul to Seattle in September from $636

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

Return flights

15 Sep - 14 Oct United
15 Sep - 06 Oct United
17 Sep - 30 Sep China Airlines
01 Sep - 06 Oct Philippine Airlines
24 Sep - 04 Oct United
17 Sep - 30 Sep Asiana Airlines direct
24 Sep - 05 Oct Asiana Airlines direct
24 Sep - 04 Oct Delta direct
23 Sep - 27 Sep Korean Air direct
15 Sep - 14 Oct Asiana Airlines direct
15 Sep - 06 Oct Asiana Airlines direct
21 Sep - 26 Sep Delta
18 Sep - 26 Sep EVA Air
19 Sep - 25 Sep EVA Air
21 Sep - 26 Sep Asiana Airlines direct
01 Sep - 06 Oct Asiana Airlines direct
03 Sep - 10 Sep Delta
18 Sep - 26 Sep Asiana Airlines direct
19 Sep - 25 Sep Delta direct

Also check the deals for one-way flights from Seoul to Seattle in September.

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