Cheapest return flights from Seattle to Seoul in September from 681€

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

Return flights

02 Sep - 09 Sep Air Canada
16 Sep - 23 Sep Air Canada
09 Sep - 15 Sep Air Canada
21 Sep - 30 Sep Air Canada
08 Sep - 17 Sep Air Canada
04 Sep - 06 Sep Asiana Airlines direct
09 Sep - 31 Oct Air Canada
07 Sep - 21 Sep Air Canada
01 Sep - 14 Sep Air Canada
07 Sep - 14 Sep Air Canada
29 Sep - 10 Oct Air Canada
26 Sep - 08 Oct Air Canada
12 Sep - 25 Sep Air Canada
29 Sep - 06 Oct Asiana Airlines direct
29 Sep - 10 Oct Asiana Airlines direct
26 Sep - 08 Oct Asiana Airlines direct
29 Sep - 20 Oct Delta direct
28 Sep - 19 Oct Delta direct
09 Sep - 31 Oct Delta direct
30 Sep - 07 Oct Hawaiian Airlines

Also check the deals for one-way 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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