Cheapest return flights from Boston to Toronto in September from 433€

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

19 Sep - 26 Sep Porter Airlines (Canada) Ltd direct
19 Sep - 25 Sep Porter Airlines (Canada) Ltd direct
19 Sep - 06 Oct Porter Airlines (Canada) Ltd direct
29 Sep - 06 Oct Porter Airlines (Canada) Ltd direct
29 Sep - 12 Oct Porter Airlines (Canada) Ltd direct

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

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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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