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

Return flights

08 Dec - 15 Dec	KLM
10 Dec - 17 Dec	KLM
09 Dec - 17 Dec	Delta
08 Dec - 17 Dec	Azores Airlines
07 Dec - 17 Dec	TAP
12 Dec - 19 Dec	Air France
11 Dec - 18 Dec	Porter Airlines (Canada) Ltd
25 Dec - 10 Jan	Porter Airlines (Canada) Ltd
14 Dec - 21 Dec	Porter Airlines (Canada) Ltd
31 Dec - 07 Jan	FrenchBee
15 Dec - 22 Dec	KLM
12 Dec - 09 Jan	KLM
30 Dec - 06 Jan	British Airways
16 Dec - 23 Dec	British Airways
29 Dec - 05 Jan	KLM
25 Dec - 01 Jan	Air France
29 Dec - 04 Jan	Porter Airlines (Canada) Ltd
26 Dec - 02 Jan	KLM
28 Dec - 04 Jan	Air Transat
24 Dec - 02 Jan	Porter Airlines (Canada) Ltd

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 573€

Return flights