Cheapest return flights from Boston to Montreal in September from $517

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 September 2025 (see full year).

Return flights

01 Sep - 02 Sep Porter Airlines (Canada) Ltd
01 Sep - 04 Sep Porter Airlines (Canada) Ltd
01 Sep - 08 Sep Porter Airlines (Canada) Ltd
01 Sep - 10 Sep Porter Airlines (Canada) Ltd
01 Sep - 12 Sep Porter Airlines (Canada) Ltd
01 Sep - 14 Sep Porter Airlines (Canada) Ltd
01 Sep - 16 Sep Porter Airlines (Canada) Ltd
01 Sep - 18 Sep Porter Airlines (Canada) Ltd
01 Sep - 03 Sep Porter Airlines (Canada) Ltd
01 Sep - 05 Sep Porter Airlines (Canada) Ltd
11 Sep - 01 Oct Porter Airlines (Canada) Ltd
11 Sep - 02 Oct Porter Airlines (Canada) Ltd
15 Sep - 01 Oct Porter Airlines (Canada) Ltd
15 Sep - 02 Oct Porter Airlines (Canada) Ltd
15 Sep - 03 Oct Porter Airlines (Canada) Ltd
15 Sep - 05 Oct Porter Airlines (Canada) Ltd
15 Sep - 06 Oct Porter Airlines (Canada) Ltd
17 Sep - 01 Oct Porter Airlines (Canada) Ltd
17 Sep - 02 Oct Porter Airlines (Canada) Ltd
17 Sep - 03 Oct Porter Airlines (Canada) Ltd

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

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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