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

Return flights

06 Dec - 15 Dec	easyJet
16 Dec - 18 Dec	Wizz Air Malta
06 Dec - 13 Dec	easyJet
06 Dec - 16 Dec	easyJet
08 Dec - 14 Dec	Lufthansa
05 Dec - 15 Dec	Lufthansa
05 Dec - 16 Dec	Lufthansa
03 Dec - 13 Dec	Austrian Airlines
05 Dec - 07 Dec	Lufthansa
26 Dec - 05 Jan	Austrian Airlines
19 Dec - 29 Dec	Lufthansa
27 Dec - 04 Jan	Lufthansa
13 Dec - 04 Jan	Lufthansa
27 Dec - 03 Jan	Lufthansa
22 Dec - 02 Jan	Lufthansa
18 Dec - 04 Jan	easyJet
19 Dec - 05 Jan	Lufthansa
26 Dec - 04 Jan	easyJet
20 Dec - 04 Jan	easyJet
24 Dec - 03 Jan	Lufthansa

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.

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Cheapest return flights from Basel to Bucharest in December from $154

Return flights