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

Return flights

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
14 Dec - 21 Dec	British Airways
05 Dec - 12 Dec	Air Canada
04 Dec - 11 Dec	SWISS
31 Dec - 07 Jan	British Airways
06 Dec - 13 Dec	Air Canada
11 Dec - 18 Dec	British Airways
30 Dec - 06 Jan	British Airways
29 Dec - 06 Jan	British Airways
25 Dec - 01 Jan	British Airways
29 Dec - 05 Jan	British Airways
26 Dec - 02 Jan	British Airways
28 Dec - 04 Jan	British Airways
24 Dec - 02 Jan	Delta

Also check the deals for one-way flights from Montreal to Warsaw 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 Warsaw in December from $652

Return flights