Cheapest return flights from Chicago to Seoul in September from 1525€

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

Return flights

16 Sep - 23 Sep Korean Air
01 Sep - 10 Sep Delta
18 Sep - 28 Oct Delta
14 Sep - 27 Sep Delta
02 Sep - 02 Oct Delta
05 Sep - 13 Sep Delta
13 Sep - 27 Sep Delta
20 Sep - 03 Oct Delta
22 Sep - 27 Sep WestJet
16 Sep - 20 Sep Korean Air
05 Sep - 08 Sep Delta

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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