AirHint found the following cheapest return flights from Vienna (VIE) to Porto (OPO) in August 2026 (see full year).

Return flights

25 Aug - 03 Sep	Ryanair
28 Aug - 18 Sep	Ryanair	direct
08 Aug - 12 Aug	Austrian Airlines	direct
28 Aug - 08 Sep	Ryanair
28 Aug - 30 Aug	Ryanair	direct
28 Aug - 06 Sep	Ryanair	direct
28 Aug - 04 Sep	Ryanair	direct
01 Aug - 06 Aug	Iberia
19 Aug - 30 Aug	Ryanair	direct
19 Aug - 06 Sep	Ryanair	direct
19 Aug - 04 Sep	Ryanair	direct
27 Aug - 29 Aug	SWISS
07 Aug - 14 Aug	Ryanair
07 Aug - 14 Aug	Ryanair	direct
07 Aug - 09 Aug	Ryanair	direct
05 Aug - 14 Aug	Vueling Airlines
05 Aug - 09 Aug	Vueling Airlines

Also check the deals for one-way flights from Vienna to Porto 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 Vienna to Porto in August from 154€

Return flights