Cheapest one-way flights from Washington to Toronto in September from $77

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

One-Way flights

03 Sep Porter Airlines (Canada) Ltd direct
04 Sep Porter Airlines (Canada) Ltd direct
13 Sep Porter Airlines (Canada) Ltd direct
25 Sep Porter Airlines (Canada) Ltd direct
14 Sep Porter Airlines (Canada) Ltd direct
19 Sep Porter Airlines (Canada) Ltd direct
10 Sep Porter Airlines (Canada) Ltd direct
23 Sep Porter Airlines (Canada) Ltd direct
01 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.

Book a cheap hotel in Toronto

Cheap car rent in Toronto

Feel free to contact us with any feedback or request another flight research.