Cheapest return flights from Boston to Toronto in September from $457

Best time to book flights for Boston (BOS) to Toronto (YTZ) flights at AirHint

AirHint found the following cheapest return flights from Boston (BOS) to Toronto (YTZ) in September 2025 (see full year).

Return flights

14 Sep - 21 Sep Porter Airlines (Canada) Ltd direct
13 Sep - 21 Sep Porter Airlines (Canada) Ltd direct
01 Sep - 03 Sep Porter Airlines (Canada) Ltd direct
01 Sep - 12 Sep Porter Airlines (Canada) Ltd direct
01 Sep - 01 Sep Porter Airlines (Canada) Ltd direct
01 Sep - 21 Sep Porter Airlines (Canada) Ltd direct
28 Sep - 12 Oct Porter Airlines (Canada) Ltd direct
14 Sep - 20 Sep Porter Airlines (Canada) Ltd direct
13 Sep - 20 Sep Porter Airlines (Canada) Ltd direct
15 Sep - 21 Sep Porter Airlines (Canada) Ltd direct
01 Sep - 20 Sep Porter Airlines (Canada) Ltd direct
28 Sep - 07 Oct Porter Airlines (Canada) Ltd direct
29 Sep - 12 Oct Porter Airlines (Canada) Ltd direct
25 Sep - 12 Oct Porter Airlines (Canada) Ltd direct
29 Sep - 07 Oct Porter Airlines (Canada) Ltd direct
25 Sep - 07 Oct Porter Airlines (Canada) Ltd direct
18 Sep - 07 Oct Porter Airlines (Canada) Ltd direct

Also check the deals for one-way flights from Boston to Toronto 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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