Cheapest return flights from St. Louis to Toronto in August from $342

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
15 Aug - 17 Aug Spirit Airlines
25 Aug - 27 Aug American Airlines
07 Aug - 10 Aug American Airlines
22 Aug - 22 Aug Delta
22 Aug - 24 Aug Air Canada direct
15 Aug - 17 Aug Air Canada direct
22 Aug - 22 Aug Air Canada direct
01 Aug - 05 Aug Spirit Airlines
01 Aug - 16 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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