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

Return flights

10 Aug - 23 Aug	Scandinavian Airlines
19 Aug - 18 Sep	Turkish Airlines
26 Aug - 09 Sep	Turkish Airlines
19 Aug - 26 Aug	LOT
16 Aug - 30 Aug	LOT
05 Aug - 19 Aug	SWISS
26 Aug - 02 Sep	United
24 Aug - 31 Aug	United
18 Aug - 25 Aug	United
08 Aug - 17 Aug	Icelandair
20 Aug - 27 Aug	United
16 Aug - 23 Aug	United
10 Aug - 16 Aug	SWISS

Also check the deals for one-way flights from Chicago to Bucharest 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 Bucharest in August from 409€

Return flights