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

Return flights

22 Sep - 29 Sep	FrenchBee
15 Sep - 22 Sep	FrenchBee
08 Sep - 15 Sep	FrenchBee
10 Sep - 17 Sep	FrenchBee
17 Sep - 24 Sep	FrenchBee
05 Sep - 12 Sep	FrenchBee
03 Sep - 10 Sep	FrenchBee
14 Sep - 21 Sep	FrenchBee
29 Sep - 06 Oct	FrenchBee
24 Sep - 01 Oct	FrenchBee
28 Sep - 05 Oct	FrenchBee
02 Sep - 09 Sep	Air Transat
02 Sep - 16 Sep	Air Transat
26 Sep - 03 Oct	FrenchBee
30 Sep - 07 Oct	Condor
27 Sep - 04 Oct	Air Transat
25 Sep - 02 Oct	Condor

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 481€

Return flights