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

Return flights

27 Aug - 11 Sep	SWISS	direct
11 Aug - 26 Aug	easyJet
19 Aug - 27 Aug	easyJet
05 Aug - 11 Sep	SWISS	direct
22 Aug - 25 Aug	TAP
19 Aug - 25 Aug	TAP
12 Aug - 26 Aug	SWISS
20 Aug - 01 Sep	SWISS
20 Aug - 02 Sep	SWISS
19 Aug - 28 Aug	easyJet	direct
26 Aug - 09 Sep	easyJet	direct
12 Aug - 03 Sep	SWISS
25 Aug - 04 Sep	easyJet	direct
27 Aug - 01 Sep	SWISS
13 Aug - 04 Sep	SWISS	direct
25 Aug - 02 Sep	TAP
21 Aug - 25 Aug	TAP
19 Aug - 27 Aug	easyJet	direct
21 Aug - 29 Aug	easyJet	direct
24 Aug - 28 Aug	easyJet

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 131€

Return flights