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

Return flights

25 Aug - 09 Sep	WestJet
11 Aug - 21 Aug	WestJet
20 Aug - 27 Aug	WestJet
02 Aug - 03 Sep	WestJet
29 Aug - 07 Sep	WestJet
24 Aug - 04 Sep	WestJet
05 Aug - 05 Sep	WestJet
15 Aug - 22 Aug	WestJet
10 Aug - 24 Aug	WestJet
24 Aug - 31 Aug	WestJet
16 Aug - 30 Aug	WestJet
02 Aug - 09 Aug	WestJet
29 Aug - 18 Sep	WestJet
29 Aug - 06 Sep	WestJet

Also check the deals for one-way flights from Waterloo 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 Waterloo to Vienna in August from $1247

Return flights