Cheapest return flights from St. Louis to Toronto in May from $593

Best time to book flights for St. Louis (STL) to Toronto (YYZ) flights at AirHint

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

Return flights

20 May - 26 May Alaska Airlines
20 May - 26 May United direct

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

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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