Cheapest one-way flights from Toronto to Washington in September from $141

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

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

One-Way flights

02 Sep Porter Airlines (Canada) Ltd direct
03 Sep Porter Airlines (Canada) Ltd direct
04 Sep Porter Airlines (Canada) Ltd direct
11 Sep Porter Airlines (Canada) Ltd direct
18 Sep Air Transat direct
16 Sep Air Transat direct
28 Sep Porter Airlines (Canada) Ltd direct

Also check the deals for return flights from Toronto to Washington 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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