AirHint found the following cheapest return flights from Chicago (ORD) to Prague (PRG) in August 2025 (see full year).

Return flights

15 Aug - 29 Aug	Scandinavian Airlines
27 Aug - 17 Sep	Icelandair
12 Aug - 22 Aug	United
12 Aug - 19 Aug	Spirit Airlines
21 Aug - 04 Sep	Turkish Airlines
24 Aug - 07 Sep	Turkish Airlines
16 Aug - 23 Aug	Air Canada
18 Aug - 25 Aug	United
22 Aug - 29 Aug	Icelandair
05 Aug - 13 Aug	Icelandair
06 Aug - 13 Aug	British Airways
08 Aug - 20 Aug	Delta
11 Aug - 24 Aug	Air France
26 Aug - 02 Sep	United
15 Aug - 05 Sep	Aer Lingus
18 Aug - 08 Sep	Delta
29 Aug - 07 Sep	Scandinavian Airlines
29 Aug - 06 Sep	Scandinavian Airlines
31 Aug - 07 Sep	United
28 Aug - 04 Sep	United

Also check the deals for one-way flights from Chicago to Prague in August.

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 Prague in August from 415€

Return flights