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

Return flights

05 Dec - 13 Dec	TAP
08 Dec - 15 Dec	TAP
03 Dec - 10 Dec	TAP
12 Dec - 27 Dec	British Airways
10 Dec - 17 Dec	KLM
07 Dec - 14 Dec	TAP
05 Dec - 14 Dec	TAP
11 Dec - 18 Dec	British Airways
14 Dec - 21 Dec	British Airways
05 Dec - 12 Dec	TAP
10 Dec - 10 Jan	SWISS
10 Dec - 10 Jan	Air Canada	direct
16 Dec - 08 Jan	Air Canada	direct
26 Dec - 29 Jan	British Airways
31 Dec - 07 Jan	British Airways
30 Dec - 10 Jan	SWISS
26 Dec - 29 Jan	Air Canada	direct
30 Dec - 06 Jan	British Airways
29 Dec - 05 Jan	Air Transat
26 Dec - 05 Jan	British Airways

Also check the deals for one-way flights from Montreal to Barcelona 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 Barcelona in December from $449

Return flights