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

Return flights

27 Aug - 03 Sep	Turkish Airlines
18 Aug - 02 Sep	Turkish Airlines
30 Aug - 03 Sep	Spirit Airlines
31 Aug - 27 Sep	Turkish Airlines
21 Aug - 22 Sep	Turkish Airlines
26 Aug - 14 Sep	Turkish Airlines
20 Aug - 27 Aug	Turkish Airlines
19 Aug - 13 Sep	Turkish Airlines
17 Aug - 06 Sep	SWISS
20 Aug - 13 Sep	SWISS
21 Aug - 28 Aug	SWISS
31 Aug - 07 Sep	Turkish Airlines
17 Aug - 22 Aug	Icelandair
30 Aug - 31 Aug	Air Serbia
20 Aug - 27 Aug	Air Serbia	direct

Also check the deals for one-way flights from Chicago to Belgrade 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 Belgrade in August from 585€

Return flights