Cheapest return flights from Seattle (SEA) to Seoul (ICN), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
01 Sep 30 Sep Cathay Pacific
01 Sep 08 Sep Cathay Pacific
01 Sep 17 Sep Cathay Pacific
08 Sep 29 Sep Cathay Pacific
01 Sep 20 Sep Cathay Pacific
29 Sep 27 Oct Cathay Pacific
24 Sep 26 Oct Cathay Pacific
05 Sep 15 Sep Cathay Pacific
10 Sep 20 Sep Cathay Pacific
09 Sep 29 Sep Cathay Pacific
10 Sep 29 Sep Cathay Pacific
23 Sep 18 Oct Cathay Pacific
12 Sep 21 Sep Cathay Pacific
23 Sep 18 Oct Asiana Airlines
Direct Flight
29 Sep 27 Oct Asiana Airlines
Direct Flight
24 Sep 26 Oct Korean Air
Direct Flight
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deals for one-way flights from Seattle to Seoul in September.

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Updated May 21, 2026.

About these fares

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