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

Return flights

02 Sep - 02 Oct	Delta
01 Sep - 11 Sep	Delta
01 Sep - 15 Sep	Delta
09 Sep - 20 Sep	Delta
13 Sep - 25 Sep	Delta
05 Sep - 17 Sep	Delta
25 Sep - 04 Oct	Delta
28 Sep - 11 Oct	Delta
12 Sep - 20 Sep	Delta
19 Sep - 26 Sep	Delta
16 Sep - 06 Oct	Delta
10 Sep - 20 Sep	Delta
17 Sep - 07 Oct	Delta
18 Sep - 26 Sep	Delta
17 Sep - 27 Sep	Delta

Also check the deals for one-way flights from Chicago to Krakow in September.

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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Cheapest return flights from Chicago to Krakow in September from $599

Return flights