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

Return flights

12 Aug - 19 Aug	Vueling Airlines
29 Aug - 03 Sep	Ryanair
06 Aug - 18 Aug	Ryanair
19 Aug - 24 Aug	Ryanair
31 Aug - 07 Sep	Ryanair
04 Aug - 22 Sep	Ryanair
20 Aug - 27 Aug	Ryanair
08 Aug - 24 Aug	Ryanair
04 Aug - 28 Aug	easyJet
25 Aug - 26 Aug	Ryanair
22 Aug - 25 Aug	Ryanair
30 Aug - 08 Sep	Vueling Airlines
29 Aug - 03 Sep	easyJet	direct
13 Aug - 20 Aug	Vueling Airlines
30 Aug - 02 Sep	Vueling Airlines
21 Aug - 28 Aug	Ryanair
30 Aug - 02 Sep	easyJet	direct
30 Aug - 08 Sep	easyJet	direct
04 Aug - 22 Sep	easyJet	direct
31 Aug - 07 Sep	easyJet	direct

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 152€

Return flights