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

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

Return flights

13 May - 20 May Porter Airlines (Canada) Ltd direct
23 May - 26 May Porter Airlines (Canada) Ltd direct
13 May - 26 May Porter Airlines (Canada) Ltd direct
13 May - 16 May Porter Airlines (Canada) Ltd direct
20 May - 26 May Porter Airlines (Canada) Ltd direct
20 May - 05 Jun Porter Airlines (Canada) Ltd direct
23 May - 05 Jun Porter Airlines (Canada) Ltd direct
18 May - 20 May Porter Airlines (Canada) Ltd direct
18 May - 26 May Porter Airlines (Canada) Ltd direct
18 May - 05 Jun Porter Airlines (Canada) Ltd direct

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

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