Cheapest return flights from Montreal (YUL) to Boston (BOS), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
01 Sep 07 Sep Porter Airlines (Canada) Ltd
Direct Flight
01 Sep 08 Sep Porter Airlines (Canada) Ltd
Direct Flight
02 Sep 09 Sep Porter Airlines (Canada) Ltd
03 Sep 10 Sep Porter Airlines (Canada) Ltd
03 Sep 06 Sep Porter Airlines (Canada) Ltd
08 Sep 15 Sep Porter Airlines (Canada) Ltd
09 Sep 16 Sep Porter Airlines (Canada) Ltd
10 Sep 17 Sep Porter Airlines (Canada) Ltd
14 Sep 21 Sep Porter Airlines (Canada) Ltd
15 Sep 22 Sep Porter Airlines (Canada) Ltd
29 Sep 06 Oct Porter Airlines (Canada) Ltd
30 Sep 07 Oct Porter Airlines (Canada) Ltd
25 Sep 02 Oct Porter Airlines (Canada) Ltd
28 Sep 05 Oct Porter Airlines (Canada) Ltd
27 Sep 04 Oct Porter Airlines (Canada) Ltd
11 Sep 01 Oct Porter Airlines (Canada) Ltd
11 Sep 02 Oct Porter Airlines (Canada) Ltd
12 Sep 01 Oct Porter Airlines (Canada) Ltd
12 Sep 02 Oct Porter Airlines (Canada) Ltd
13 Sep 01 Oct Porter Airlines (Canada) Ltd
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deals for one-way flights from Montreal to Boston in September.

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Updated Jul 12, 2026.

About these fares

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