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

Return flights

18 Aug - 20 Sep	Icelandair
21 Aug - 22 Sep	Turkish Airlines
27 Aug - 12 Sep	Turkish Airlines
21 Aug - 23 Sep	Turkish Airlines
26 Aug - 09 Sep	Turkish Airlines
20 Aug - 20 Sep	Spirit Airlines
18 Aug - 29 Aug	Icelandair
25 Aug - 08 Sep	Turkish Airlines
23 Aug - 24 Sep	Turkish Airlines
21 Aug - 21 Sep	Turkish Airlines
19 Aug - 25 Aug	Lufthansa
11 Aug - 25 Aug	Icelandair
10 Aug - 11 Sep	Turkish Airlines
19 Aug - 29 Aug	Icelandair
17 Aug - 29 Aug	Icelandair
13 Aug - 27 Aug	Lufthansa
14 Aug - 28 Aug	Icelandair
16 Aug - 29 Aug	Icelandair
05 Aug - 26 Aug	SWISS
18 Aug - 25 Aug	Icelandair

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 503€

Return flights