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

Return flights

05 Dec - 10 Jan	KLM
01 Dec - 15 Dec	KLM
24 Dec - 07 Jan	British Airways
10 Dec - 10 Dec	SKY express
27 Dec - 11 Jan	SWISS
24 Dec - 30 Dec	British Airways
31 Dec - 06 Jan	Air Canada
20 Dec - 10 Jan	British Airways
22 Dec - 04 Jan	SWISS
22 Dec - 05 Jan	SWISS
20 Dec - 07 Jan	SWISS
19 Dec - 06 Jan	SWISS
29 Dec - 29 Dec	Aegean Airlines
10 Dec - 20 Dec	British Airways
19 Dec - 29 Dec	Lufthansa

Also check the deals for one-way flights from Athens to Montreal 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 Athens to Montreal in December from $645

Return flights