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

Return flights

08 Dec - 13 Dec	easyJet	direct
29 Dec - 03 Jan	easyJet	direct
07 Dec - 12 Dec	easyJet	direct
28 Dec - 04 Jan	easyJet	direct
13 Dec - 16 Dec	easyJet	direct
12 Dec - 15 Dec	easyJet
08 Dec - 11 Dec	easyJet
23 Dec - 04 Jan	easyJet	direct
20 Dec - 02 Jan	Iberia
09 Dec - 14 Dec	easyJet	direct
20 Dec - 02 Jan	easyJet	direct
12 Dec - 15 Dec	easyJet	direct
27 Dec - 03 Jan	easyJet	direct
02 Dec - 07 Dec	easyJet	direct
07 Dec - 15 Dec	easyJet
03 Dec - 07 Dec	easyJet	direct

Also check the deals for one-way flights from Madrid to Basel in December.

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 December from $98

Return flights