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

Return flights

03 Dec - 10 Dec	WestJet
05 Dec - 12 Dec	WestJet
06 Dec - 13 Dec	WestJet
01 Dec - 08 Dec	WestJet
07 Dec - 14 Dec	WestJet
02 Dec - 09 Dec	WestJet
08 Dec - 15 Dec	WestJet
09 Dec - 11 Dec	Porter Airlines (Canada) Ltd
02 Dec - 03 Dec	Porter Airlines (Canada) Ltd
01 Dec - 03 Dec	Porter Airlines (Canada) Ltd
23 Dec - 13 Jan	WestJet
17 Dec - 05 Jan	Porter Airlines (Canada) Ltd
23 Dec - 09 Jan	WestJet
23 Dec - 06 Jan	WestJet
23 Dec - 11 Jan	WestJet
23 Dec - 07 Jan	WestJet
23 Dec - 08 Jan	WestJet
30 Dec - 06 Jan	WestJet
24 Dec - 14 Jan	Porter Airlines (Canada) Ltd
31 Dec - 12 Jan	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Montreal to Los Angeles 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 Los Angeles in December from $234

Return flights