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

Return flights

02 Sep - 09 Sep	Porter Airlines (Canada) Ltd
04 Sep - 11 Sep	Porter Airlines (Canada) Ltd
14 Sep - 21 Sep	Air Transat
16 Sep - 23 Sep	Air Transat
09 Sep - 16 Sep	Air Transat
17 Sep - 24 Sep	FrenchBee
11 Sep - 18 Sep	Air Transat
12 Sep - 19 Sep	FrenchBee
13 Sep - 20 Sep	Air Transat
22 Sep - 29 Sep	Air Transat
16 Sep - 04 Oct	Air Transat
24 Sep - 01 Oct	Condor
30 Sep - 07 Oct	Condor
16 Sep - 03 Oct	Air Transat
28 Sep - 05 Oct	Air Transat
29 Sep - 06 Oct	Air Transat
20 Sep - 11 Oct	Air Transat
26 Sep - 03 Oct	FrenchBee
27 Sep - 04 Oct	Air Transat
25 Sep - 02 Oct	Air Transat

Also check the deals for one-way flights from Montreal 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 Montreal to Belgrade in September from 538€

Return flights