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

Return flights

11 Dec - 14 Dec	SWISS	direct
31 Dec - 04 Jan	KLM
19 Dec - 02 Jan	Air Serbia
22 Dec - 29 Dec	SWISS	direct
21 Dec - 03 Jan	Air Serbia
30 Dec - 04 Jan	SWISS
20 Dec - 03 Jan	Air Serbia
30 Dec - 04 Jan	SWISS	direct
23 Dec - 05 Jan	KLM
24 Dec - 04 Jan	Air Serbia
23 Dec - 05 Jan	SWISS	direct
21 Dec - 03 Jan	SWISS	direct

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 $207

Return flights