Cheapest one-way flights from Boston to Toronto in September from $88

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

One-Way flights

04 Sep Porter Airlines (Canada) Ltd
15 Sep Porter Airlines (Canada) Ltd
17 Sep Porter Airlines (Canada) Ltd
17 Sep Porter Airlines (Canada) Ltd direct
16 Sep Porter Airlines (Canada) Ltd
16 Sep Porter Airlines (Canada) Ltd direct
26 Sep Porter Airlines (Canada) Ltd
25 Sep Porter Airlines (Canada) Ltd
27 Sep Porter Airlines (Canada) Ltd direct
24 Sep Porter Airlines (Canada) Ltd direct

Also check the deals for return 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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