Cheapest return flights from Boston to Toronto in May from $288

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

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

Return flights

29 May - 01 Jun Porter Airlines (Canada) Ltd
29 May - 19 Jun Porter Airlines (Canada) Ltd
26 May - 30 May Air Canada direct
24 May - 26 May Air Canada direct
31 May - 01 Jun Air Canada direct
29 May - 01 Jun United direct
29 May - 19 Jun United direct
24 May - 25 May Air Canada
23 May - 25 May Porter Airlines (Canada) Ltd
29 May - 16 Jun Porter Airlines (Canada) Ltd
29 May - 10 Jun Porter Airlines (Canada) Ltd
29 May - 12 Jun Porter Airlines (Canada) Ltd
29 May - 08 Jun Porter Airlines (Canada) Ltd
29 May - 15 Jun Porter Airlines (Canada) Ltd
24 May - 25 May Air Canada direct
22 May - 28 May Porter Airlines (Canada) Ltd
22 May - 27 May Porter Airlines (Canada) Ltd
19 May - 26 May Air Canada
19 May - 27 May Porter Airlines (Canada) Ltd
19 May - 29 May Porter Airlines (Canada) Ltd

Also check the deals for one-way 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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