Cheap Flights from Toronto (YYZ) to St. Louis (SUS)

Popular airlines from Toronto Pearson Intl. Airport (YYZ) to St. Louis, MO (SUS-Spirit of St. Louis)

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $393
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $393
Flights from Toronto (YYZ) to St. Louis (SUS)
Origin airport
Pearson Intl.
Destination airport
Spirit of St. Louis
Distance
669 mi

Toronto to St. Louis Flights

The cheapest times to fly from Toronto to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Toronto to St. Louis are during the month of . You can find some of the cheapest flights from Toronto to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Toronto to St. Louis

Sunday is one of the best days to book for cheap flights from Toronto to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Toronto to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Toronto to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Toronto to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Toronto to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Pearson Intl. Airport (YYZ) to Spirit of St. Louis Airport (SUS) cost?
Secure a cheap one-way flight or cheap return flight from Pearson Intl. Airport (YYZ) to Spirit of St. Louis Airport (SUS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Pearson Intl. Airport (YYZ) to Spirit of St. Louis Airport (SUS)?
is the least expensive month to fly from YYZ to SUS. Avoiding peak travel times is often the key to scoring lower fares.
What is the cheapest airline that flies from Pearson Intl. Airport (YYZ) to Spirit of St. Louis Airport (SUS)?
To find the cheapest airline flying from YYZ to SUS, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Pearson Intl. Airport (YYZ) to Spirit of St. Louis Airport (SUS)?
You'll need to hop on a flight with a layover when traveling from Pearson Intl. Airport (YYZ) to Spirit of St. Louis Airport (SUS). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from YYZ to SUS?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Pearson Intl. Airport (YYZ) to Spirit of St. Louis Airport (SUS)?
To arrive at Spirit of St. Louis Airport (SUS) on schedule, choose a flight that takes off from Pearson Intl. Airport (YYZ) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for St. Louis from Pearson Intl. Airport (YYZ)?
Explore your flight options from Pearson Intl. Airport (YYZ) to Lambert-St. Louis Intl. Airport (STL). This is the only St. Louis airport you can land at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Pearson Intl. Airport (YYZ) to Spirit of St. Louis Airport (SUS) last-minute?
Booking your plane ticket from YYZ to SUS shortly before your journey is usually more expensive. However, if there's some wiggle room with your travel dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a YYZ to SUS flight and hotel package?
Compared with arranging flights and hotels separately, booking a YYZ to SUS flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place takes the hassle out of travel planning. Simply secure your flights and choose from our wide range of hotels, then personalize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Pearson Intl. Airport (YYZ) to Spirit of St. Louis Airport (SUS)?
If you booked your YYZ to SUS flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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*Available to One Key members.