Cheapest return flights from Chicago to Seoul in September from $912

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

01 Sep - 17 Sep Turkish Airlines
08 Sep - 15 Sep Cathay Pacific
10 Sep - 17 Sep Cathay Pacific
10 Sep - 25 Sep Cathay Pacific
21 Sep - 27 Sep Cathay Pacific
19 Sep - 27 Sep Cathay Pacific
06 Sep - 13 Sep WestJet
08 Sep - 15 Sep Korean Air direct
10 Sep - 17 Sep Korean Air direct
10 Sep - 25 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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