Cheapest return flights from Chicago to Seoul in September from $913

Best time to book flights for Chicago (ORD) to Seoul (ICN) flights at AirHint

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

Return flights

03 Sep - 15 Oct Cathay Pacific
03 Sep - 16 Sep Cathay Pacific
07 Sep - 23 Sep Cathay Pacific
21 Sep - 27 Sep Cathay Pacific
18 Sep - 28 Sep Turkish Airlines
18 Sep - 20 Sep Turkish Airlines
03 Sep - 16 Sep Delta direct
03 Sep - 15 Oct Delta direct
18 Sep - 20 Sep Korean Air direct
21 Sep - 27 Sep Delta direct

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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