Cheapest return flights from Toronto to Washington in May from $129

Best time to book flights for Toronto (YTZ) to Washington (IAD) flights at AirHint

AirHint found the following cheapest return flights from Toronto (YTZ) to Washington (IAD) in May 2025 (see full year).

Return flights

23 May - 26 May Porter Airlines (Canada) Ltd direct
08 May - 12 May Porter Airlines (Canada) Ltd direct
20 May - 27 May Porter Airlines (Canada) Ltd direct
02 May - 04 May Porter Airlines (Canada) Ltd direct
18 May - 26 May Porter Airlines (Canada) Ltd direct
18 May - 01 Jun Air Transat direct
09 May - 17 May Air Transat direct
17 May - 18 May Porter Airlines (Canada) Ltd direct
23 May - 31 May Porter Airlines (Canada) Ltd direct
21 May - 31 May Porter Airlines (Canada) Ltd direct
21 May - 26 May Porter Airlines (Canada) Ltd direct
23 May - 09 Jun Porter Airlines (Canada) Ltd direct
21 May - 09 Jun Porter Airlines (Canada) Ltd direct
20 May - 09 Jun Porter Airlines (Canada) Ltd direct
28 May - 01 Jun Porter Airlines (Canada) Ltd direct
28 May - 09 Jun Porter Airlines (Canada) Ltd direct
22 May - 09 Jun Porter Airlines (Canada) Ltd direct
23 May - 06 Jun Porter Airlines (Canada) Ltd direct
23 May - 01 Jun Porter Airlines (Canada) Ltd direct
21 May - 06 Jun Porter Airlines (Canada) Ltd direct

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