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

Return flights

31 Aug - 08 Sep	Vueling Airlines
26 Aug - 31 Aug	easyJet	direct
28 Aug - 31 Aug	easyJet	direct
22 Aug - 25 Aug	Ryanair
22 Aug - 25 Aug	easyJet	direct
13 Aug - 20 Aug	Ryanair
31 Aug - 08 Sep	easyJet	direct
21 Aug - 23 Aug	easyJet	direct
22 Aug - 23 Aug	easyJet	direct
25 Aug - 31 Aug	easyJet	direct
18 Aug - 20 Aug	Air Europa
09 Aug - 18 Aug	Ryanair

Also check the deals for one-way flights from Porto to Basel 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 Basel in August from 151€

Return flights