Cheapest return flights from St. Louis to Toronto in March from $294

AirHint found the following cheapest return flights from St. Louis (STL) to Toronto (YYZ) in March 2026 (see full year).

Return flights

03 Mar - 17 Mar Frontier Airlines
10 Mar - 31 Mar Frontier Airlines
09 Mar - 12 Mar Frontier Airlines
16 Mar - 21 Mar Frontier Airlines
20 Mar - 27 Mar Southern Airways Express
06 Mar - 14 Mar Frontier Airlines
06 Mar - 15 Mar Frontier Airlines
07 Mar - 15 Mar Frontier Airlines
06 Mar - 13 Mar Frontier Airlines
05 Mar - 12 Mar Alaska Airlines

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

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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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