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

Return flights

25 Sep - 28 Sep	Wizz Air Malta
25 Sep - 13 Oct	Ryanair
04 Sep - 25 Sep	Ryanair
08 Sep - 10 Sep	Ryanair
15 Sep - 19 Sep	Ryanair
29 Sep - 30 Sep	Ryanair
22 Sep - 25 Sep	Ryanair
15 Sep - 20 Sep	Ryanair
29 Sep - 10 Oct	Ryanair
26 Sep - 13 Oct	Ryanair
25 Sep - 28 Sep	Lufthansa	direct
10 Sep - 17 Sep	Ryanair
26 Sep - 28 Sep	Lufthansa	direct
27 Sep - 02 Oct	easyJet
20 Sep - 06 Oct	easyJet
29 Sep - 10 Oct	Air Serbia	direct
25 Sep - 13 Oct	Air Serbia	direct
26 Sep - 13 Oct	Air Serbia	direct
20 Sep - 06 Oct	Air Serbia	direct
25 Sep - 12 Oct	Wizz Air Malta

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 130€

Return flights