Cheapest one-way flights from St. Louis to Toronto in August from $139

AirHint found the following cheapest one-way flights from St. Louis (STL) to Toronto (YYZ) in August 2025 (see full year).

One-Way flights

02 Aug American Airlines
25 Aug Air Canada direct
02 Aug Air Canada direct
11 Aug Air Canada
11 Aug Air Canada direct
08 Aug Air Canada direct
03 Aug Air Canada direct
27 Aug Delta
28 Aug Air Canada direct
27 Aug Air Canada direct

Also check the deals for return flights from St. Louis to Toronto in August.

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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