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

Return flights

14 Aug - 19 Aug	Turkish Airlines
26 Aug - 09 Sep	Turkish Airlines
18 Aug - 03 Sep	Turkish Airlines
26 Aug - 29 Aug	Scandinavian Airlines
18 Aug - 25 Aug	United
26 Aug - 02 Sep	United
20 Aug - 27 Aug	United
11 Aug - 24 Aug	Air France
08 Aug - 20 Aug	Delta
16 Aug - 23 Aug	United
22 Aug - 29 Aug	United
24 Aug - 31 Aug	United
30 Aug - 07 Sep	LOT
16 Aug - 30 Aug	LOT
28 Aug - 25 Sep	Aer Lingus
28 Aug - 04 Sep	United
29 Aug - 06 Sep	KLM

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 465€

Return flights