Cheapest one-way flights from Washington to Toronto in September from $118

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

AirHint found the following cheapest one-way flights from Washington (IAD) to Toronto (YTZ) in September 2025 (see full year).

One-Way flights

08 Sep Porter Airlines (Canada) Ltd direct
10 Sep Porter Airlines (Canada) Ltd direct
11 Sep Porter Airlines (Canada) Ltd direct
05 Sep Porter Airlines (Canada) Ltd direct
03 Sep Air Transat direct
19 Sep Porter Airlines (Canada) Ltd direct
22 Sep Porter Airlines (Canada) Ltd direct
16 Sep Porter Airlines (Canada) Ltd direct

Also check the deals for return flights from Washington to Toronto in September.

Skyscanner

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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