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

Return flights

27 Aug - 16 Sep	easyJet	direct
26 Aug - 11 Sep	easyJet	direct
31 Aug - 18 Sep	easyJet	direct
26 Aug - 04 Sep	SWISS	direct
21 Aug - 04 Sep	SWISS	direct
27 Aug - 10 Sep	easyJet
25 Aug - 09 Sep	easyJet
26 Aug - 09 Sep	easyJet
26 Aug - 10 Sep	easyJet
26 Aug - 12 Sep	easyJet	direct
22 Aug - 27 Aug	SWISS	direct
26 Aug - 28 Aug	SWISS	direct
19 Aug - 28 Aug	SWISS	direct
26 Aug - 29 Aug	SWISS	direct
19 Aug - 27 Aug	SWISS	direct
21 Aug - 29 Aug	SWISS	direct
20 Aug - 22 Aug	SWISS	direct
25 Aug - 29 Aug	easyJet	direct
27 Aug - 28 Aug	SWISS	direct
22 Aug - 28 Aug	SWISS	direct

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 $178

Return flights