Cheapest return flights from Boston to Montreal in August from $515

Best time to book flights for Boston (BOS) to Montreal (YUL) flights at AirHint

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

Return flights

16 Aug - 06 Sep Porter Airlines (Canada) Ltd
17 Aug - 06 Sep Porter Airlines (Canada) Ltd
18 Aug - 06 Sep Porter Airlines (Canada) Ltd
19 Aug - 06 Sep Porter Airlines (Canada) Ltd
20 Aug - 06 Sep Porter Airlines (Canada) Ltd
21 Aug - 06 Sep Porter Airlines (Canada) Ltd
22 Aug - 06 Sep Porter Airlines (Canada) Ltd
23 Aug - 06 Sep Porter Airlines (Canada) Ltd
24 Aug - 06 Sep Porter Airlines (Canada) Ltd
26 Aug - 06 Sep Porter Airlines (Canada) Ltd
01 Aug - 02 Aug Porter Airlines (Canada) Ltd
01 Aug - 03 Aug Porter Airlines (Canada) Ltd
01 Aug - 04 Aug Porter Airlines (Canada) Ltd
01 Aug - 05 Aug Porter Airlines (Canada) Ltd
01 Aug - 06 Aug Porter Airlines (Canada) Ltd
01 Aug - 07 Aug Porter Airlines (Canada) Ltd
01 Aug - 08 Aug Porter Airlines (Canada) Ltd
01 Aug - 09 Aug Porter Airlines (Canada) Ltd
01 Aug - 10 Aug Porter Airlines (Canada) Ltd
01 Aug - 11 Aug Porter Airlines (Canada) Ltd

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

Skyscanner

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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