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

Return flights

10 Sep - 23 Sep	Ryanair
20 Sep - 06 Oct	Wizz Air Malta
20 Sep - 22 Sep	Wizz Air Malta
17 Sep - 20 Sep	Wizz Air Malta
11 Sep - 27 Sep	Wizz Air Malta
22 Sep - 26 Sep	Wizz Air Malta
24 Sep - 26 Sep	Wizz Air Malta
04 Sep - 14 Oct	easyJet
25 Sep - 26 Sep	easyJet
24 Sep - 01 Oct	Ryanair
10 Sep - 17 Sep	Ryanair
10 Sep - 08 Oct	Ryanair
22 Sep - 08 Oct	Ryanair
03 Sep - 05 Sep	easyJet
15 Sep - 20 Sep	Wizz Air
08 Sep - 08 Oct	easyJet
02 Sep - 08 Oct	easyJet
29 Sep - 04 Oct	Air Serbia	direct
08 Sep - 08 Oct	Lufthansa	direct
24 Sep - 01 Oct	Lufthansa	direct

Also check the deals for one-way flights from Frankfurt 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 Frankfurt to Belgrade in September from 135€

Return flights