AirHint found the following cheapest return flights from Brussels (BRU) to Belgrade (BEG) in September 2025 (see full year).

Return flights

24 Sep - 26 Sep	Ryanair
27 Sep - 15 Oct	FlyOne (Romania)
23 Sep - 25 Sep	Ryanair
24 Sep - 25 Sep	Wizz Air Malta
09 Sep - 10 Sep	Ryanair
09 Sep - 25 Sep	Ryanair
22 Sep - 24 Sep	Ryanair
17 Sep - 26 Sep	Ryanair
22 Sep - 26 Sep	Ryanair
10 Sep - 17 Sep	Ryanair
16 Sep - 20 Sep	Ryanair
29 Sep - 03 Oct	Wizz Air Malta
26 Sep - 02 Oct	Ryanair
19 Sep - 01 Oct	Wizz Air Malta
26 Sep - 03 Oct	Ryanair
29 Sep - 03 Oct	Air Serbia	direct
26 Sep - 03 Oct	Air Serbia	direct
19 Sep - 01 Oct	Air Serbia	direct

Also check the deals for one-way flights from Brussels to Belgrade in September.

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 Brussels to Belgrade in September from 103€

Return flights