Q: How much does it cost to fly round-trip from St. Louis to Toronto?

Airfare is below average for this route at the moment. St. Louis to Toronto flights typically cost between C$ 550 and C$ 938 in August. The cheapest round-trip price found within the last 3 days was C$ 450 on Multiple Airlines (21 Aug-24 Aug).

Question 1

Which airport typically offers the quickest layover for flights from St. Louis to Toronto?

Accepted Answer

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 2h 08m.

Question 2

How much does it cost to fly round-trip from St. Louis to Toronto?

Accepted Answer

Airfare is below average for this route at the moment.St. Louis to Toronto flights typically cost between C$ 550 and C$ 938 in August.
The cheapest round-trip price found within the last 3 days was C$ 450 on Multiple Airlines (21 Aug-24 Aug).

Question 3

What’s the top layover airport for flights from St. Louis to Toronto?

Accepted Answer

Chicago (ORD) – chosen by Cheapflights users on 67% of one-stop itineraries from St. Louis to Toronto on Cheapflights.

Question 4

What’s the cheapest layover airport for flights from St. Louis to Toronto?

Accepted Answer

Chicago (ORD) is the most affordable 1-stop option, with an average round-trip price of C$ 691.

Question 5

What’s the fastest layover option from St. Louis to Toronto?

Accepted Answer

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 3h 36m.

Question 6

What are the cheapest airlines flying from St. Louis to Toronto round-trip?

Accepted Answer

Our cheapest airline available from St. Louis to Toronto is American Airlines. Our recent data shows that you can find tickets from as low as C$ 454 on this airline. Additional options worth looking into are United Airlines and Air Canada, starting at C$ 605 and C$ 697 round-trip. Users have found that American Airlines is 22% cheaper than the other options available to this destination.

Question 7

What are the cheapest airlines to fly from St. Louis to Toronto one-way?

Accepted Answer

For one-way options, check prices for American Airlines. According to our data, you can fly for as low as C$ 188. Users have also found prices from C$ 309 and C$ 311 on United Airlines and Air Canada, respectively.

Question 8

How far ahead should I book a flight from St. Louis to Toronto?

Accepted Answer

Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Toronto. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 9

What is the cheapest month to book a flight from St. Louis to Toronto?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from St. Louis to Toronto (average of C$ 167). Flying from St. Louis to Toronto in July is currently the most expensive (average of C$ 258). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 10

What is the cheapest day to fly from St. Louis to Toronto?

Accepted Answer

Travelers seeking maximum savings on their St. Louis to Toronto flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 11

Weekly flight availability from St. Louis to Toronto

Accepted Answer

The most flights from STL to YTO are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

Question 12

E

Accepted Answer

In terms of precipitation, rainfall in Toronto ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Toronto when rainfall is around 51.0 mm.

Question 13

E

Accepted Answer

If weather is an important factor for your trip to Toronto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

Question 14

What are the cheapest flights from St. Louis to Toronto?

Accepted Answer

While on average a flight from St. Louis to Toronto is generally C$ 750, our data shows the cheapest flight currently is C$ 555. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 513 for that flight.

Question 15

What are the most reliable airlines from St. Louis to Toronto?

Accepted Answer

Consider United Airlines (80%), Air Canada (78%) or Jazz (75%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Toronto.

Question 16

What is the cheapest day to fly round-trip from St. Louis to Toronto?

Accepted Answer

Leaving on a Wednesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 160% on the overall cost on flights from St. Louis to Toronto.

Question 17

How far in advance should I book a flight from St. Louis to Toronto?

Accepted Answer

Travellers have found it’s best to book a flight 53 days in advance to save up to 367% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 53 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to Toronto 1-2 weeks in advance for as low as C$ 431, or C$ 1,139 for flights within the next 24 hours.

Question 18

What is the cheapest month to fly from St. Louis to Toronto?

Accepted Answer

The best pricing can be found in the month of January. Prices to Toronto from St. Louis average C$ 586. You can even find prices in January for less than C$ 586, as users have found deals to Toronto from as low as C$ 340. The month of March appears to be one of the more expensive times to travel to Toronto from St. Louis. Flying in the targeted month can save you up to 36%.

Question 19

What is the cheapest time of day to fly from STL to YTO?

Accepted Answer

One of the essential ways to save on airfare from St. Louis to Toronto is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 25% on airfare.

Question 20

What airport do you fly from for flights from St. Louis to Toronto?

Accepted Answer

Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Toronto. On average, Lambert-St Louis has 4 outbound flights to Toronto per day from 1 airline. Lambert-St Louis is conveniently located just 20.4 km from St. Louis’s city centre.

Question 21

Can I find deals for flights from St. Louis to Toronto that include hotel bookings?

Accepted Answer

Yes. In addition to deals on St. Louis to Toronto flights, Cheapflights offers vacation packages that include both flights and hotel.

Question 22

How can I find direct flights from St. Louis to Toronto?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Toronto.

Question 23

Can I find deals for business class flights from St. Louis to Toronto?

Accepted Answer

Yes. Cheapflights offers flight deals from St. Louis to Toronto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 24

How does Cheapflights help users find flights from St. Louis to Toronto?

Accepted Answer

Deals for St. Louis to Toronto flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Question 25

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Toronto?

Accepted Answer

Cheapflights simply makes it quick and affordable to book flights from St. Louis to Toronto by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Question 26

Can Cheapflights find flights from St. Louis to Toronto with no change fees?

Accepted Answer

Yes! Cheapflights helps users easily find flights from St. Louis to Toronto with no change fees.

Question 27

Can Cheapflights notify me if prices for flights from St. Louis to Toronto become cheaper?

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Round-trip from	C$ 450
One-way from	C$ 188
Popular in	March
Cheapest in	January
Average price	C$ 671
Good round-trip deal	C$ 764 or less
Good one-way deal	C$ 607 or less

Cheap flights from St. Louis to Toronto from C$ 188

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Lambert-St Louis to Toronto are usually found in January or April, booked 52 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

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Cheapest flights from St. Louis to TorontoExplore the most affordable flight options available from St. Louis to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 July 2025.

Explore the most affordable flight options available from St. Louis to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 July 2025.

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Use the filters below to find and compare flights from St. Louis to Toronto that are best for you.

Best time to book a flight from St. Louis to Toronto

Have a flexible travel schedule? Discover the best time to fly to Toronto from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Toronto

How far ahead should I book a flight from St. Louis to Toronto?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Toronto. Price data was last updated on 25 July 2025.

What is the cheapest month to book a flight from St. Louis to Toronto?

What is the cheapest time of day to fly from STL to YTO?

Find hourly flight availability from St. Louis to Toronto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 July 2025.

Weekly flight availability from St. Louis to Toronto

Explore weekly flight availability from St. Louis to Toronto. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 29 July 2025.

How much does it cost to fly round-trip from St. Louis to Toronto?

What’s the top layover airport for flights from St. Louis to Toronto?

Share of one-stop round-trip flights from St. Louis to Toronto chosen by Cheapflights users in the past 12 months, using the same layover each way.

What’s the cheapest layover airport for flights from St. Louis to Toronto?

Average round-trip fare for 1-stop flights from St. Louis to Toronto, chosen by Cheapflights users in the past 12 months, with the same layover each way.

What’s the fastest layover option from St. Louis to Toronto?

Shortest average travel time for 1-stop one-way flights from St. Louis to Toronto, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Which airport typically offers the quickest layover for flights from St. Louis to Toronto?

Average layover duration for 1-stop one-way flights from St. Louis to Toronto, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Toronto

Check out reviews from past customers who have flown with United Airlines,American Airlines, andAir Canada from St. Louis to Toronto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Toronto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from St. Louis to Toronto?

What are the cheapest airlines flying from St. Louis to Toronto round-trip?

What are the cheapest airlines to fly from St. Louis to Toronto one-way?

What are the most reliable airlines from St. Louis to Toronto?

What are the cheapest flights from St. Louis to Toronto?

Can I find deals for flights from St. Louis to Toronto that include hotel bookings?

How can I find direct flights from St. Louis to Toronto?

Can I find deals for business class flights from St. Louis to Toronto?

What is the cheapest month to book a flight from St. Louis to Toronto?

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Alternative routes for St. Louis to Toronto

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Top airline flying from St. Louis to Toronto

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How does Cheapflights help users find flights from St. Louis to Toronto?

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Toronto?

Can Cheapflights find flights from St. Louis to Toronto with no change fees?

Can Cheapflights notify me if prices for flights from St. Louis to Toronto become cheaper?

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Cheapest flights from St. Louis to Toronto
Explore the most affordable flight options available from St. Louis to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 July 2025.