Cheap flights from Toronto to St. Louis from C$ 284

The month of January is, on average, the cheapest month to fly to St. Louis from Toronto, with most prices found around C$ 587. If you don’t want to visit St. Louis in January, then you should wait until February to fly from Toronto, when ticket prices are also cheap, with an average price of C$ 601.

Our data shows that Sunday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as C$ 651. The most expensive day to fly to St. Louis is Monday, with ticket prices averaging around C$ 851.

The cheapest time of day to fly to St. Louis is in the morning when flights can be purchased for as low as C$ 672. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are C$ 1,011 on average. Flights to St. Louis from Toronto in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Toronto Pearson Intl to Lambert-St Louis for the best Toronto - Lambert-St Louis flight prices

You are more likely to see cheaper flights to St. Louis from Toronto when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around C$ 750 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Toronto for as low as C$ 417 on momondo.

There are 4 cabin classes available to choose from on Toronto to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 5% on your flight if you consider stops on a Toronto to St. Louis flight.

Chicago (ORD) was the most common stop: 75% of momondo users choosing one-stop flights on this route connected there.

Flights via Chicago (ORD) offer the lowest average round-trip price of C$ 749.

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 4h 39m.

Detroit (DTW) has the shortest average layover time for this route: 0h 57m.

As of October 2026, 1 flights take off from Toronto and land in St. Louis each day. The most common flight departure time for this route is 12:00p.m., with 66% of daily flights taking off in the afternoon.

As of October 2026, there are 8 flights per week flying from Toronto to St. Louis. The most common day of the week flights depart is Wed, with 25% of flights taking off on this day.