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

Return flights

14 Sep - 29 Sep	Porter Airlines (Canada) Ltd
14 Sep - 30 Sep	Air Canada
01 Sep - 22 Sep	Air Transat
01 Sep - 10 Sep	Air Canada
01 Sep - 16 Sep	Air Canada
22 Sep - 09 Oct	Porter Airlines (Canada) Ltd
01 Sep - 18 Sep	Porter Airlines (Canada) Ltd
05 Sep - 19 Sep	Porter Airlines (Canada) Ltd
09 Sep - 22 Sep	Air Canada
08 Sep - 25 Sep	Air Canada
14 Sep - 15 Sep	Air Canada

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 645€

Return flights