Cheap flights from Toronto to St. Louis from $188

In general, December is the cheapest month to fly from Toronto to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $168. The month of October is another great option to travel to St. Louis, with average flight prices from Toronto averaging around $175.

The cheapest day to depart on your flight to St. Louis is on a Sunday when prices can be found for as low as $394. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $496. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

Flying to St. Louis from Toronto in the morning is the least expensive time of day to depart. momondo users have found prices as low as $349 when looking at flights departing in the morning. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $408 per ticket.

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 $496 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 $359 on momondo.

You could potentially save up to 35% on your flight if you consider stops on a Toronto to St. Louis flight.

As of May 2026, prices for Toronto to St. Louis flights are approximately 24% cheaper when compared to flights at the same time last year.

4 flights are operational daily from Toronto to St. Louis as of May 2026. The most popular departure time for this route is 11:00AM, with 50% of flights per day taking off at noon.

As of May 2026, there are 28 flights per week flying from Toronto to St. Louis. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.