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

Return flights

29 Sep - 09 Oct	Air Canada
25 Sep - 02 Oct	Air France
30 Sep - 09 Oct	Air Canada
30 Sep - 07 Oct	Air Canada
29 Sep - 06 Oct	Air France
28 Sep - 05 Oct	FrenchBee
24 Sep - 01 Oct	Air France
23 Sep - 30 Sep	SWISS
21 Sep - 11 Oct	WestJet
22 Sep - 11 Oct	FrenchBee
20 Sep - 11 Oct	Air Transat
25 Sep - 30 Sep	Lufthansa
21 Sep - 28 Sep	FrenchBee
22 Sep - 29 Sep	FrenchBee
19 Sep - 26 Sep	FrenchBee
20 Sep - 27 Sep	Air Transat

Also check the deals for one-way flights from Montreal to Budapest 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 Budapest in September from $629

Return flights