Cheapest one-way flights from St. Louis to Toronto in August from $173

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

One-Way flights

25 Aug Spirit Airlines
09 Aug Spirit Airlines
07 Aug Spirit Airlines
31 Aug Spirit Airlines
01 Aug Spirit Airlines
25 Aug Air Canada direct
09 Aug Air Canada direct
31 Aug Air Canada direct
07 Aug Air Canada direct
01 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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