Cheapest return flights from St. Louis to Toronto in August from $323

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

Return flights

22 Aug - 24 Aug Spirit Airlines
01 Aug - 04 Aug Spirit Airlines
22 Aug - 24 Aug Air Canada direct
01 Aug - 16 Aug United direct
01 Aug - 03 Aug Spirit Airlines
14 Aug - 23 Aug Air Canada direct
12 Aug - 19 Aug Air Canada direct
15 Aug - 17 Aug United
15 Aug - 17 Aug Air Canada direct
29 Aug - 31 Aug Delta

Also check the deals for one-way 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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