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

Return flights

05 Dec - 12 Dec	WestJet
03 Dec - 10 Dec	WestJet
01 Dec - 08 Dec	Air Canada
02 Dec - 09 Dec	Lufthansa
04 Dec - 11 Dec	Lufthansa
07 Dec - 14 Dec	FrenchBee
06 Dec - 13 Dec	Air Transat
26 Dec - 17 Jan	FrenchBee
09 Dec - 16 Dec	Air Transat
14 Dec - 21 Dec	WestJet
13 Dec - 20 Dec	Azores Airlines
23 Dec - 17 Jan	FrenchBee
30 Dec - 06 Jan	FrenchBee
16 Dec - 10 Jan	British Airways
31 Dec - 07 Jan	Air Canada
22 Dec - 17 Jan	Air Canada
17 Dec - 10 Jan	Air Canada
25 Dec - 01 Jan	Air Canada
29 Dec - 05 Jan	Lufthansa
28 Dec - 04 Jan	Air Canada

Also check the deals for one-way flights from Montreal to Sofia 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 Sofia

Cheap car rent in Sofia

Cheapest return flights from Montreal to Sofia in December from 536€

Return flights