$110 Cheap Flights from St. Louis (STL) to Toronto (YYZ)

View $110 flight on Thu, Nov 13, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Toronto Pearson Intl. Airport (YYZ)

Cheap Flights from St. Louis to Toronto (STL-YYZ)

Prices were available within the past 7 days and start at $110 for one-way flights and $301 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Oct 18 - Fri, Oct 24
STL
St. Louis
YYZ
Toronto
$301 Roundtrip, found 5 hours ago
$301
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Sat, Oct 18 from St. Louis to Toronto, returning Fri, Oct 24, priced at $301 found 5 hours ago
American Airlines
Tue, Oct 28 - Sat, Nov 1
STL
St. Louis
YYZ
Toronto
$333 Roundtrip, found 2 days ago
$333
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Oct 28 from St. Louis to Toronto, returning Sat, Nov 1, priced at $333 found 2 days ago
American Airlines
Wed, Dec 24 - Wed, Dec 31
STL
St. Louis
YYZ
Toronto
$334 Roundtrip, found 1 day ago
$334
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Dec 24 from St. Louis to Toronto, returning Wed, Dec 31, priced at $334 found 1 day ago
American Airlines
Mon, Nov 17 - Fri, Nov 21
STL
St. Louis
YYZ
Toronto
$342 Roundtrip, found 1 day ago
$342
Roundtrip
found 1 day ago
Select American Airlines flight, departing Mon, Nov 17 from St. Louis to Toronto, returning Fri, Nov 21, priced at $342 found 1 day ago
American Airlines
Wed, Dec 24 - Wed, Dec 31
STL
St. Louis
YYZ
Toronto
$344 Roundtrip, found 1 day ago
$344
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Dec 24 from St. Louis to Toronto, returning Wed, Dec 31, priced at $344 found 1 day ago
United
Thu, Oct 23 - Wed, Oct 29
STL
St. Louis
YYZ
Toronto
$350 Roundtrip, found 8 hours ago
$350
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Oct 23 from St. Louis to Toronto, returning Wed, Oct 29, priced at $350 found 8 hours ago
American Airlines
Sat, Oct 18 - Fri, Oct 24
STL
St. Louis
YYZ
Toronto
$351 Roundtrip, found 5 hours ago
$351
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Sat, Oct 18 from St. Louis to Toronto, returning Fri, Oct 24, priced at $351 found 5 hours ago
American Airlines
Wed, Oct 15 - Tue, Oct 21
STL
St. Louis
YYZ
Toronto
$360 Roundtrip, found 3 days ago
$360
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Oct 15 from St. Louis to Toronto, returning Tue, Oct 21, priced at $360 found 3 days ago
Air Canada
Tue, Nov 11 - Sat, Nov 15
STL
St. Louis
YYZ
Toronto
$369 Roundtrip, found 2 days ago
$369
Roundtrip
found 2 days ago
Select Air Canada flight, departing Tue, Nov 11 from St. Louis to Toronto, returning Sat, Nov 15, priced at $369 found 2 days ago
Delta
Tue, Oct 28 - Sat, Nov 1
STL
St. Louis
YYZ
Toronto
$382 Roundtrip, found 2 days ago
$382
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Oct 28 from St. Louis to Toronto, returning Sat, Nov 1, priced at $382 found 2 days ago

Find the cheapest month to fly from St. Louis (STL) to Toronto (YYZ)

August is typically the cheapest month to fly

From $353 - $655 per traveler.

Graph displaying average flight prices per month

Alternative airports near Toronto

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

Select flight to Billy Bishop Toronto City YTZ. Closest option available. Average driving time to city center is 4 minutes. Flights from $645
YTZ
Billy Bishop Toronto City
Closest
Average driving time to city center4 min
Flights from $645
Flights from St. Louis (STL) to Toronto (YYZ)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Pearson Intl.
Airlines serving
Air Canada, American Airlines, Delta, United, WestJet
Roundtrip price
$300
Distance
654 mi
Average flight time
3 hours 48 mins

St. Louis to Toronto Flights

The cheapest times to fly from St. Louis to Toronto

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 St. Louis to Toronto are during the month of October. You can find some of the cheapest flights from St. Louis to Toronto with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from St. Louis to Toronto: 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 St. Louis to Toronto

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 St. Louis to Toronto in 2025. You can also book with separate airlines for your outbound and return journeys, from $110 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 St. Louis to Toronto 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 St. Louis to Toronto 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 Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ) cost?
Secure a cheap one-way flight from $110 or cheap return flight from $301 from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ) 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 Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ)?
The cheapest month to fly from STL to YYZ is October, when demand is low. Off-peak season is often when airlines offer lower prices between these airports.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ)?
Take a direct flight with Air Canada and fly straight from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ).
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ)?
To find the cheapest airline flying from STL to YYZ, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ)?
On average, just 1 direct flight departs each day from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ). Want additional options? Use our filter tool to discover flights with layovers and explore a new city along the way.
What are the most popular departure times for flights from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ)?
More travelers fly between STL and YYZ at 3 PM than at any other point in the day. Prefer a quieter experience? Pick a flight outside the busiest times and there's a chance you'll save on your fare as well.
What day of the week has the most flights from STL to YYZ?
If you jet off on a Friday, you'll get the biggest range of options for flights from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ).
What is the earliest flight from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ)?
Take the earliest flight at around 3:50PM UTC-6, departing from Lambert-St. Louis Intl. Airport (STL). You'll be flying for roughly 1h 55m, arriving at Pearson Intl. Airport (YYZ) at approximately 6:45PM UTC-5.
How long does it take to fly from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ)?
It takes around 1 hour and 55 minutes to travel the 650 mi from STL to YYZ.
What airline has the least delays from STL to YYZ?
Air Canada has the best performance for on-time direct flights from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ), with an on-time score of 85%. Use the Expedia App to look up your flight status before you take off and get notified of any trip changes.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ) route, aim to fly before 3 PM. Flights after this time are 22% more likely to be canceled.**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 Toronto from Lambert-St. Louis Intl. Airport (STL)?
Explore your flight options from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ). This is the only Toronto airport you can land at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ) last-minute?
Booking your ticket from STL to YYZ shortly before your trip is usually more expensive. But if you're flexible with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a STL to YYZ flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to YYZ flight and hotel package with Expedia could result in significant savings. Better still, having everything in one easy place will take the stress out of planning your trip. Just pick your flights and choose from our wide range of stays, then tailor your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Pearson Intl. Airport (YYZ)?
Typically, you can cancel or reschedule your STL to YYZ flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you'd like more information, go to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.