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

Return flights

18 Dec - 06 Jan	Wizz Air Malta
18 Dec - 25 Dec	Wizz Air Malta
15 Dec - 08 Jan	Air Serbia
17 Dec - 06 Jan	Wizz Air Malta
22 Dec - 25 Dec	Animawings
01 Dec - 06 Dec	Ryanair
03 Dec - 06 Dec	Ryanair
30 Dec - 01 Jan	HiSky Europe
06 Dec - 09 Dec	Lufthansa
12 Dec - 14 Dec	Lufthansa
02 Dec - 06 Dec	Lufthansa
13 Dec - 16 Dec	Lufthansa
11 Dec - 14 Dec	Lufthansa
05 Dec - 09 Dec	Lufthansa
24 Dec - 02 Jan	KLM
31 Dec - 02 Jan	Wizz Air Malta
30 Dec - 03 Jan	HiSky Europe
29 Dec - 01 Jan	Ryanair
30 Dec - 04 Jan	HiSky Europe
30 Dec - 02 Jan	HiSky Europe

Also check the deals for one-way flights from Bucharest 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 Bucharest to Basel in December from 103€

Return flights