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

Return flights

01 Dec - 08 Dec	British Airways
03 Dec - 10 Dec	British Airways
07 Dec - 14 Dec	British Airways
09 Dec - 16 Dec	British Airways
02 Dec - 09 Dec	British Airways
08 Dec - 15 Dec	British Airways
10 Dec - 17 Dec	British Airways
05 Dec - 12 Dec	Air France
04 Dec - 11 Dec	Air France
06 Dec - 13 Dec	Air France
31 Dec - 07 Jan	British Airways
30 Dec - 09 Jan	SWISS
30 Dec - 06 Jan	British Airways
25 Dec - 11 Jan	Air France
25 Dec - 01 Jan	Air France
29 Dec - 05 Jan	SWISS
28 Dec - 04 Jan	TAP
26 Dec - 02 Jan	TAP
25 Dec - 04 Jan	Air France
27 Dec - 03 Jan	Air Canada

Also check the deals for one-way flights from Montreal to Athens 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 Athens in December from $691

Return flights