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

Return flights

10 Sep - 17 Sep	Air Transat
24 Sep - 01 Oct	Air Transat
17 Sep - 24 Sep	Air Transat
07 Sep - 14 Sep	FrenchBee
03 Sep - 10 Sep	FrenchBee
15 Sep - 22 Sep	FrenchBee
29 Sep - 06 Oct	FrenchBee
11 Sep - 18 Sep	Air Transat
14 Sep - 21 Sep	FrenchBee
05 Sep - 12 Sep	FrenchBee
21 Sep - 28 Sep	FrenchBee
26 Sep - 03 Oct	FrenchBee
28 Sep - 05 Oct	FrenchBee
12 Sep - 19 Sep	Air Transat
25 Sep - 02 Oct	Air Transat
30 Sep - 07 Oct	Condor
27 Sep - 04 Oct	Air Transat

Also check the deals for one-way flights from Montreal to Prague 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 Prague in September from $567

Return flights