Cheapest return flights from Chicago to Seoul in September from $926

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

24 Sep - 12 Oct Turkish Airlines
01 Sep - 19 Sep Cathay Pacific
26 Sep - 14 Oct Turkish Airlines
13 Sep - 27 Sep Cathay Pacific
26 Sep - 12 Oct Turkish Airlines
15 Sep - 12 Oct Cathay Pacific
27 Sep - 27 Oct Turkish Airlines
26 Sep - 14 Oct Korean Air direct
24 Sep - 12 Oct Korean Air direct
01 Sep - 19 Sep Delta direct
27 Sep - 27 Oct Delta direct
15 Sep - 12 Oct Delta direct
26 Sep - 12 Oct Korean Air direct
13 Sep - 27 Sep Korean Air 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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