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

Return flights

16 Dec - 18 Dec	Wizz Air
12 Dec - 14 Dec	Lufthansa
04 Dec - 07 Dec	Lufthansa
04 Dec - 08 Dec	Austrian Airlines
06 Dec - 13 Dec	Lufthansa
05 Dec - 07 Dec	Lufthansa
01 Dec - 08 Dec	Lufthansa
13 Dec - 16 Dec	Lufthansa
06 Dec - 08 Dec	Lufthansa
06 Dec - 10 Dec	Lufthansa
20 Dec - 11 Jan	Wizz Air
29 Dec - 05 Jan	Lufthansa
29 Dec - 01 Jan	Air France
29 Dec - 02 Jan	Lufthansa
21 Dec - 11 Jan	Lufthansa
30 Dec - 02 Jan	Wizz Air
30 Dec - 03 Jan	Wizz Air
31 Dec - 03 Jan	Wizz Air
20 Dec - 03 Jan	Wizz Air
23 Dec - 04 Jan	Wizz Air

Also check the deals for one-way flights from Basel to Bucharest 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.

Book a cheap hotel in Bucharest

Cheap car rent in Bucharest

Cheapest return flights from Basel to Bucharest in December from $140

Return flights