Cheapest return flights from Toronto to Washington in September from $276

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 September 2025 (see full year).

Return flights

04 Sep - 15 Sep Porter Airlines (Canada) Ltd direct
02 Sep - 15 Sep Porter Airlines (Canada) Ltd direct
03 Sep - 15 Sep Porter Airlines (Canada) Ltd direct
11 Sep - 15 Sep Porter Airlines (Canada) Ltd direct
04 Sep - 13 Sep Porter Airlines (Canada) Ltd direct
02 Sep - 03 Sep Porter Airlines (Canada) Ltd direct
03 Sep - 13 Sep Porter Airlines (Canada) Ltd direct
11 Sep - 13 Sep Porter Airlines (Canada) Ltd direct
11 Sep - 02 Oct Porter Airlines (Canada) Ltd direct
28 Sep - 12 Oct Porter Airlines (Canada) Ltd direct
28 Sep - 09 Oct Porter Airlines (Canada) Ltd direct
28 Sep - 02 Oct Porter Airlines (Canada) Ltd direct

Also check the deals for one-way 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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