AirHint found the following cheapest return flights from Toronto (YYZ) to Vienna (VIE) in September 2025 (see full year).

Return flights

09 Sep - 17 Sep	Porter Airlines (Canada) Ltd
28 Sep - 08 Oct	WestJet
21 Sep - 14 Oct	Condor
22 Sep - 29 Sep	Condor
15 Sep - 29 Sep	Condor
02 Sep - 23 Sep	Flair Airlines
09 Sep - 22 Sep	Porter Airlines (Canada) Ltd
08 Sep - 22 Sep	WestJet
11 Sep - 25 Sep	Condor
11 Sep - 07 Oct	Porter Airlines (Canada) Ltd
27 Sep - 13 Oct	Condor
11 Sep - 22 Sep	Porter Airlines (Canada) Ltd
10 Sep - 21 Sep	WestJet
21 Sep - 30 Sep	WestJet
19 Sep - 03 Oct	WestJet
20 Sep - 02 Oct	Air Transat
28 Sep - 08 Oct	Austrian Airlines	direct

Also check the deals for one-way flights from Toronto to Vienna 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 Toronto to Vienna in September from 453€

Return flights