Cheapest return flights from St. Louis to Toronto in October from $249

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

Return flights

30 Oct - 06 Nov Spirit Airlines
15 Oct - 19 Oct Frontier Airlines
02 Oct - 08 Oct Spirit Airlines
03 Oct - 07 Oct Southern Airways Express
03 Oct - 06 Oct Southern Airways Express
04 Oct - 17 Oct Frontier Airlines
06 Oct - 19 Oct Frontier Airlines
11 Oct - 14 Oct Frontier Airlines
09 Oct - 13 Oct Spirit Airlines
07 Oct - 13 Oct Frontier Airlines
05 Oct - 18 Oct Spirit Airlines
30 Oct - 06 Nov Air Canada direct

Also check the deals for one-way flights from St. Louis to Toronto in October.

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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