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

Return flights

02 Dec - 09 Dec	Air Canada
03 Dec - 10 Dec	Air Canada
01 Dec - 08 Dec	Air Canada
04 Dec - 11 Dec	Air Canada
05 Dec - 12 Dec	Air Canada
07 Dec - 14 Dec	Air Canada
09 Dec - 16 Dec	Air Canada
06 Dec - 13 Dec	Air Canada
10 Dec - 17 Dec	KLM
14 Dec - 21 Dec	British Airways
31 Dec - 07 Jan	Air Canada
25 Dec - 01 Jan	British Airways
29 Dec - 05 Jan	British Airways
30 Dec - 06 Jan	British Airways
26 Dec - 02 Jan	British Airways
28 Dec - 04 Jan	British Airways
18 Dec - 06 Jan	British Airways
19 Dec - 04 Jan	British Airways
19 Dec - 03 Jan	KLM

Also check the deals for one-way flights from Montreal 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 Montreal to Bucharest in December from $650

Return flights