AirHint found the following cheapest one-way flights from St. Louis (STL) to Toronto (YYZ) in October 2025 (see full year).
One-Way flights
| 30 Oct | Spirit Airlines | ||
| 23 Oct | Spirit Airlines | ||
| 21 Oct | Frontier Airlines | ||
| 04 Oct | Frontier Airlines | ||
| 30 Oct | Air Canada | direct | |
| 23 Oct | Air Canada | direct | |
| 21 Oct | Air Canada | direct | |
| 04 Oct | Air Canada | direct |
Also check the deals for return flights from St. Louis to Toronto in October.
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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