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

Return flights

12 Dec - 15 Dec	Vueling Airlines
04 Dec - 09 Dec	SWISS	direct
04 Dec - 08 Dec	SWISS	direct
13 Dec - 16 Dec	Vueling Airlines
11 Dec - 15 Dec	Air Serbia
03 Dec - 08 Dec	Air Serbia
05 Dec - 06 Dec	Air Serbia
11 Dec - 13 Dec	Air Serbia
12 Dec - 13 Dec	Air Serbia
07 Dec - 31 Jan	Air Serbia
04 Dec - 07 Dec	SWISS	direct
07 Dec - 31 Jan	SWISS	direct
28 Dec - 01 Jan	Eurowings
16 Dec - 05 Jan	SWISS
26 Dec - 01 Jan	Air Serbia
18 Dec - 05 Jan	easyJet
18 Dec - 06 Jan	easyJet
20 Dec - 10 Jan	Air Serbia
20 Dec - 05 Jan	Air Serbia
19 Dec - 05 Jan	Condor

Also check the deals for one-way flights from Zurich 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 Zurich to Bucharest in December from 158€

Return flights