Cheapest return flights from Boston to Toronto in September from $408

AirHint found the following cheapest return flights from Boston (BOS) to Toronto (YYZ) in September 2026 (see full year).

Return flights

03 Sep - 07 Sep Porter Airlines (Canada) Ltd
28 Sep - 09 Oct Porter Airlines (Canada) Ltd
29 Sep - 09 Oct Porter Airlines (Canada) Ltd
27 Sep - 09 Oct Porter Airlines (Canada) Ltd
03 Sep - 05 Sep Porter Airlines (Canada) Ltd
03 Sep - 03 Sep Porter Airlines (Canada) Ltd

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

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