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

Return flights

14 Sep - 21 Sep	FrenchBee
07 Sep - 19 Sep	FrenchBee
08 Sep - 30 Sep	FrenchBee
09 Sep - 17 Sep	Air Transat
15 Sep - 07 Oct	FrenchBee
29 Sep - 06 Oct	FrenchBee
15 Sep - 22 Sep	FrenchBee
28 Sep - 05 Oct	FrenchBee
22 Sep - 02 Oct	FrenchBee
29 Sep - 02 Oct	FrenchBee
08 Sep - 15 Sep	FrenchBee
10 Sep - 01 Oct	FrenchBee
10 Sep - 17 Sep	FrenchBee
29 Sep - 03 Oct	FrenchBee
09 Sep - 05 Oct	Air Transat
12 Sep - 19 Sep	FrenchBee
17 Sep - 08 Oct	FrenchBee
09 Sep - 16 Sep	Air Transat
24 Sep - 08 Oct	FrenchBee
08 Sep - 22 Sep	Air Transat

Also check the deals for one-way flights from Montreal to Bucharest 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 Bucharest in September from $593

Return flights