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

Return flights

21 Aug - 21 Aug	SWISS	direct
15 Aug - 15 Aug	SWISS	direct
01 Aug - 01 Aug	SWISS	direct
02 Aug - 02 Aug	SWISS	direct
07 Aug - 07 Aug	SWISS	direct
31 Aug - 19 Sep	easyJet	direct
19 Aug - 26 Aug	TAP
21 Aug - 12 Sep	easyJet	direct
26 Aug - 02 Sep	SWISS
21 Aug - 26 Aug	TAP
18 Aug - 17 Sep	easyJet
28 Aug - 11 Sep	easyJet	direct
13 Aug - 27 Aug	SWISS
24 Aug - 05 Sep	easyJet	direct
24 Aug - 27 Aug	easyJet
25 Aug - 09 Sep	easyJet
24 Aug - 07 Sep	easyJet
18 Aug - 03 Sep	easyJet
18 Aug - 27 Aug	easyJet
20 Aug - 28 Sep	SWISS

Also check the deals for one-way flights from Zurich 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 Zurich to Porto in August from 132€

Return flights