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

Return flights

10 Dec - 12 Dec	transavia
10 Dec - 13 Dec	transavia
10 Dec - 14 Dec	transavia
09 Dec - 13 Dec	transavia
11 Dec - 14 Dec	transavia
11 Dec - 13 Dec	transavia
11 Dec - 12 Dec	transavia
19 Dec - 05 Jan	transavia
20 Dec - 02 Jan	transavia
18 Dec - 04 Jan	transavia
23 Dec - 04 Jan	transavia
20 Dec - 04 Jan	transavia

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.

Book a cheap hotel in Bucharest

Cheap car rent in Bucharest

Cheapest return flights from Rotterdam to Bucharest in December from $216

Return flights