Cheapest return flights from Seattle to Seoul in September from $992

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

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

Return flights

07 Sep - 18 Sep China Airlines
08 Sep - 12 Sep Air Canada
02 Sep - 15 Sep China Airlines
08 Sep - 15 Sep China Airlines
07 Sep - 19 Sep Air Canada
12 Sep - 21 Sep China Airlines
13 Sep - 22 Sep EVA Air
07 Sep - 21 Sep Air Canada
07 Sep - 20 Sep Air Canada
20 Sep - 05 Oct EVA Air
05 Sep - 14 Sep China Airlines
24 Sep - 12 Oct Turkish Airlines
24 Sep - 12 Oct Asiana Airlines direct
25 Sep - 08 Oct Asiana Airlines direct
20 Sep - 05 Oct Delta 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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