AirHint found the following cheapest return flights from Montreal (YUL) to Vienna (VIE) in August 2025 (see full year).

Return flights

31 Aug - 07 Sep	Air Transat
21 Aug - 04 Sep	FrenchBee
30 Aug - 06 Sep	FrenchBee
26 Aug - 02 Sep	FrenchBee
28 Aug - 04 Sep	FrenchBee
21 Aug - 28 Aug	Air Transat
27 Aug - 03 Sep	FrenchBee
29 Aug - 13 Sep	FrenchBee
29 Aug - 05 Sep	FrenchBee
26 Aug - 01 Sep	Air Transat
25 Aug - 03 Sep	TAP
20 Aug - 27 Aug	WestJet
21 Aug - 31 Aug	FrenchBee
02 Aug - 25 Aug	Porter Airlines (Canada) Ltd
19 Aug - 26 Aug	Air Transat
18 Aug - 25 Aug	Air Transat
14 Aug - 21 Aug	Porter Airlines (Canada) Ltd
04 Aug - 25 Aug	FrenchBee
24 Aug - 31 Aug	Air Transat
23 Aug - 30 Aug	Air Transat

Also check the deals for one-way flights from Montreal to Vienna in August.

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 Vienna in August from 605€

Return flights