Cheapest return flights from Toronto to Boston in May from $376

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

Return flights

15 May - 16 May Porter Airlines (Canada) Ltd direct
15 May - 29 May Porter Airlines (Canada) Ltd direct
21 May - 29 May Porter Airlines (Canada) Ltd direct
15 May - 30 May Porter Airlines (Canada) Ltd direct
15 May - 28 May Porter Airlines (Canada) Ltd direct
21 May - 30 May Porter Airlines (Canada) Ltd direct
21 May - 28 May Porter Airlines (Canada) Ltd direct

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