AirHint found the following cheapest return flights from Chicago (ORD) to Warsaw (WAW) in May 2026 (see full year).

Return flights

05 May - 20 May	Finnair
05 May - 19 May	Finnair
04 May - 18 May	British Airways
10 May - 01 Jun	Finnair
06 May - 18 May	Finnair
12 May - 25 May	Finnair
01 May - 12 May	Finnair
08 May - 15 May	Finnair
06 May - 13 May	LOT	direct
04 May - 13 May	LOT	direct
01 May - 12 May	LOT	direct
08 May - 08 Jun	Finnair
01 May - 15 Jun	Finnair
10 May - 01 Jun	LOT	direct
15 May - 05 Jun	Finnair
21 May - 01 Jun	Finnair
17 May - 07 Jun	Finnair
08 May - 08 Jun	LOT	direct
27 May - 03 Jun	Scandinavian Airlines
25 May - 09 Jun	Lufthansa

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

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 May from 403€

Return flights