Cheapest return flights from Chicago to Seoul in September from $700

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

Return flights

02 Sep - 09 Sep Cathay Pacific
18 Sep - 22 Sep Cathay Pacific
10 Sep - 21 Oct Cathay Pacific
10 Sep - 22 Oct Cathay Pacific
10 Sep - 13 Oct Cathay Pacific
08 Sep - 17 Sep Cathay Pacific
11 Sep - 17 Sep Cathay Pacific
10 Sep - 16 Sep Cathay Pacific
05 Sep - 14 Sep Cathay Pacific
02 Sep - 19 Sep Cathay Pacific
08 Sep - 25 Sep Cathay Pacific
04 Sep - 18 Sep Cathay Pacific
10 Sep - 23 Oct Cathay Pacific
01 Sep - 13 Sep Cathay Pacific
12 Sep - 30 Oct Cathay Pacific
10 Sep - 21 Oct Korean Air direct
10 Sep - 22 Oct Korean Air direct
10 Sep - 23 Oct Korean Air direct
10 Sep - 13 Oct Delta direct
20 Sep - 03 Oct Hawaiian Airlines

Also check the deals for one-way flights from Chicago 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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