Cheapest return flights from St. Louis to Toronto in December from $495

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

Return flights

24 Dec - 31 Dec American Airlines
24 Dec - 31 Dec Air Canada direct
24 Dec - 03 Jan United

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

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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