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

Return flights

28 Aug - 01 Sep	Vueling Airlines
29 Aug - 01 Sep	Vueling Airlines
27 Aug - 03 Sep	KLM
19 Aug - 25 Aug	TAP
18 Aug - 03 Sep	TAP
22 Aug - 26 Aug	easyJet	direct
27 Aug - 03 Sep	easyJet	direct
18 Aug - 25 Aug	TAP
19 Aug - 25 Aug	easyJet	direct
30 Aug - 01 Sep	TAP
29 Aug - 31 Aug	Vueling Airlines
20 Aug - 25 Aug	Air Europa
26 Aug - 25 Sep	Ryanair
12 Aug - 19 Aug	easyJet
25 Aug - 02 Sep	Vueling Airlines
20 Aug - 25 Aug	easyJet	direct
12 Aug - 24 Aug	easyJet
12 Aug - 04 Sep	easyJet
20 Aug - 27 Aug	Air Europa
25 Aug - 02 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 227€

Return flights