Cheapest return flights from Boston to Toronto in May from $382

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

Return flights

26 May - 09 Jun Porter Airlines (Canada) Ltd direct
26 May - 11 Jun Porter Airlines (Canada) Ltd direct
26 May - 10 Jun Porter Airlines (Canada) Ltd direct
26 May - 12 Jun Porter Airlines (Canada) Ltd direct
08 May - 22 May Porter Airlines (Canada) Ltd direct
01 May - 04 May Porter Airlines (Canada) Ltd direct
01 May - 22 May Porter Airlines (Canada) Ltd direct

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

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