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

Return flights

27 Aug - 01 Sep	Ryanair
29 Aug - 01 Sep	Ryanair
28 Aug - 01 Sep	Ryanair
27 Aug - 03 Sep	Ryanair
29 Aug - 04 Sep	Ryanair
29 Aug - 02 Sep	Ryanair	direct
29 Aug - 08 Sep	Ryanair
26 Aug - 01 Sep	Ryanair
28 Aug - 04 Sep	Ryanair
27 Aug - 17 Sep	Ryanair	direct
12 Aug - 16 Aug	Eurowings
12 Aug - 19 Aug	Eurowings
27 Aug - 28 Aug	Ryanair	direct
26 Aug - 28 Aug	Ryanair	direct
29 Aug - 31 Aug	Ryanair
27 Aug - 31 Aug	Ryanair
27 Aug - 29 Aug	Ryanair	direct
26 Aug - 29 Aug	Ryanair	direct
12 Aug - 14 Aug	Eurowings
15 Aug - 21 Aug	TAP

Also check the deals for one-way flights from Porto 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 Porto to Vienna in August from 210€

Return flights