AirHint found the following cheapest return flights from Chicago (MDW) to Warsaw (WAW) in October 2025 (see full year).

Return flights

27 Oct - 11 Nov	Delta
29 Oct - 11 Nov	KLM
21 Oct - 28 Oct	Delta
22 Oct - 31 Oct	Delta
20 Oct - 27 Oct	Delta
22 Oct - 15 Nov	Delta
26 Oct - 10 Nov	Delta
16 Oct - 30 Oct	Delta
12 Oct - 28 Oct	Delta
23 Oct - 15 Nov	Delta
25 Oct - 15 Nov	Delta
03 Oct - 06 Oct	Frontier Airlines
15 Oct - 22 Oct	WestJet
12 Oct - 15 Oct	Delta
01 Oct - 04 Oct	Delta
09 Oct - 16 Oct	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Chicago to Warsaw in October.

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 Warsaw in October from 466€

Return flights