AirHint found the following cheapest one-way flights from Ontario (ONT) to Vienna (VIE) in October 2025 (see full year).

One-Way flights

20 Oct	British Airways
30 Oct	British Airways
07 Oct	British Airways
13 Oct	British Airways
12 Oct	Iberia
10 Oct	British Airways
17 Oct	British Airways
16 Oct	Iberia
06 Oct	British Airways
03 Oct	British Airways

Also check the deals for return flights from Ontario to Vienna in October.

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 one-way flights from Ontario to Vienna in October from $617

One-Way flights