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

Return flights

23 Dec - 05 Jan	United
23 Dec - 02 Jan	Delta
24 Dec - 28 Dec	WestJet
24 Dec - 29 Dec	Delta
23 Dec - 28 Dec	WestJet
24 Dec - 29 Dec	Air Canada	direct
23 Dec - 05 Jan	Air Canada	direct
23 Dec - 02 Jan	Air Canada	direct
24 Dec - 28 Dec	Air Canada	direct
23 Dec - 28 Dec	Air Canada	direct

Also check the deals for one-way flights from Miami 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 Miami to Montreal in December from 385€

Return flights