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

Return flights

09 Dec - 16 Dec	transavia
10 Dec - 16 Dec	transavia
10 Dec - 17 Dec	transavia
11 Dec - 22 Dec	transavia
09 Dec - 14 Dec	transavia
11 Dec - 18 Dec	transavia
10 Dec - 12 Dec	transavia
11 Dec - 14 Dec	transavia
09 Dec - 12 Dec	transavia
02 Dec - 04 Dec	transavia
13 Dec - 10 Jan	transavia
18 Dec - 05 Jan	transavia
26 Dec - 05 Jan	transavia
18 Dec - 06 Jan	transavia
18 Dec - 04 Jan	transavia
24 Dec - 02 Jan	Pegasus Airlines

Also check the deals for one-way flights from Rotterdam 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 Rotterdam to Bucharest in December from $214

Return flights