Cheapest return flights from St. Louis (STL) to Toronto (YYZ), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
27 Sep 30 Sep Southern Airways Express
15 Sep 17 Sep Frontier Airlines
11 Sep 14 Sep WestJet
10 Sep 13 Sep WestJet
27 Sep 30 Sep Air Canada
Direct Flight
15 Sep 17 Sep Air Canada
Direct Flight
11 Sep 14 Sep Air Canada
Direct Flight
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deals for one-way flights from St. Louis to Toronto in September.

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Updated Aug 27, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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