Cheapest return flights from Boston to Montreal in May from $437

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 May 2025 (see full year).

Return flights

01 May - 02 May Porter Airlines (Canada) Ltd
01 May - 04 May Porter Airlines (Canada) Ltd
01 May - 05 May Porter Airlines (Canada) Ltd
01 May - 06 May Porter Airlines (Canada) Ltd
01 May - 07 May Porter Airlines (Canada) Ltd
01 May - 08 May Porter Airlines (Canada) Ltd
01 May - 09 May Porter Airlines (Canada) Ltd
01 May - 11 May Porter Airlines (Canada) Ltd
01 May - 12 May Porter Airlines (Canada) Ltd
01 May - 13 May Porter Airlines (Canada) Ltd
11 May - 01 Jun Porter Airlines (Canada) Ltd
12 May - 01 Jun Porter Airlines (Canada) Ltd
12 May - 02 Jun Porter Airlines (Canada) Ltd
13 May - 01 Jun Porter Airlines (Canada) Ltd
13 May - 02 Jun Porter Airlines (Canada) Ltd
13 May - 03 Jun Porter Airlines (Canada) Ltd
15 May - 01 Jun Porter Airlines (Canada) Ltd
15 May - 02 Jun Porter Airlines (Canada) Ltd
15 May - 03 Jun Porter Airlines (Canada) Ltd
15 May - 04 Jun Porter Airlines (Canada) Ltd

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

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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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