Cheapest return flights from St. Louis to Toronto in March from $222

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 March 2025 (see full year).

Return flights

06 Mar - 11 Mar Spirit Airlines
05 Mar - 10 Mar Frontier Airlines
11 Mar - 18 Mar Spirit Airlines
11 Mar - 26 Mar Spirit Airlines
11 Mar - 16 Mar Spirit Airlines
04 Mar - 09 Mar Spirit Airlines
07 Mar - 11 Mar Southern Airways Express
18 Mar - 24 Mar Frontier Airlines
08 Mar - 16 Mar Frontier Airlines
01 Mar - 04 Mar Frontier Airlines

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

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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