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

Return flights

14 Aug - 18 Aug	Air Canada	direct
21 Aug - 26 Aug	Air Canada	direct
07 Aug - 21 Aug	Air Canada	direct
13 Aug - 23 Aug	Frontier Airlines
08 Aug - 21 Aug	Air Canada	direct
15 Aug - 22 Aug	Air Canada	direct
09 Aug - 15 Aug	Frontier Airlines
11 Aug - 15 Aug	Frontier Airlines
13 Aug - 23 Aug	Air Canada	direct
11 Aug - 15 Aug	Air Canada	direct

Also check the deals for one-way flights from Miami to Montreal in August.

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 August from 254€

Return flights