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

Return flights

02 Jul - 08 Jul	Condor
02 Jul - 09 Jul	Condor
02 Jul - 12 Jul	Condor
03 Jul - 08 Jul	Eurowings
03 Jul - 09 Jul	Eurowings
02 Jul - 05 Jul	Condor
03 Jul - 10 Jul	Eurowings
03 Jul - 11 Jul	Eurowings
03 Jul - 15 Jul	Eurowings
02 Jul - 07 Jul	Condor
02 Jul - 28 Aug	Condor
29 Jul - 06 Aug	easyJet
22 Jul - 19 Aug	easyJet
29 Jul - 05 Aug	easyJet
30 Jul - 04 Aug	Austrian Airlines
14 Jul - 28 Aug	Vueling Airlines
29 Jul - 14 Aug	KLM
29 Jul - 04 Aug	easyJet
31 Jul - 05 Aug	Vueling Airlines
23 Jul - 13 Aug	easyJet

Also check the deals for one-way flights from Basel to Porto in July.

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 Basel to Porto in July from $171

Return flights