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

Return flights

28 Aug - 08 Sep	Ryanair
27 Aug - 01 Sep	Volotea
25 Aug - 01 Sep	Wizz Air
29 Aug - 08 Sep	Lufthansa
18 Aug - 18 Aug	Lufthansa
24 Aug - 24 Aug	Lufthansa
31 Aug - 31 Aug	Lufthansa
28 Aug - 07 Sep	KLM
30 Aug - 03 Sep	Lufthansa
30 Aug - 06 Sep	KLM
31 Aug - 01 Sep	Iberia Express
28 Aug - 05 Sep	Lufthansa
20 Aug - 21 Aug	easyJet	direct
29 Aug - 07 Sep	Lufthansa
22 Aug - 29 Aug	Wizz Air
27 Aug - 31 Aug	Lufthansa
29 Aug - 31 Aug	Lufthansa
26 Aug - 31 Aug	Lufthansa
18 Aug - 21 Aug	easyJet	direct
20 Aug - 22 Aug	easyJet	direct

Also check the deals for one-way flights from Madrid 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 Madrid to Basel in August from 178€

Return flights