Cheapest one-way flights from Boston to Toronto in May from $114

AirHint found the following cheapest one-way flights from Boston (BOS) to Toronto (YYZ) in May 2026 (see full year).

One-Way flights

07 May Porter Airlines (Canada) Ltd
24 May Porter Airlines (Canada) Ltd
10 May Porter Airlines (Canada) Ltd
19 May Porter Airlines (Canada) Ltd
08 May Porter Airlines (Canada) Ltd
21 May Porter Airlines (Canada) Ltd
25 May Porter Airlines (Canada) Ltd
17 May Air Canada direct
20 May Porter Airlines (Canada) Ltd
26 May Porter Airlines (Canada) Ltd

Also check the deals for return flights from Boston to Toronto in May.

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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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