Cheapest one-way flights from Chicago to Seoul in September from $492

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

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

One-Way flights

03 Sep Turkish Airlines
18 Sep Frontier Airlines
15 Sep Turkish Airlines
04 Sep Turkish Airlines
11 Sep Turkish Airlines
27 Sep Turkish Airlines
19 Sep Turkish Airlines
03 Sep Korean Air direct
15 Sep Delta direct
04 Sep Delta direct

Also check the deals for return 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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