Cheap flights from St. Louis to Toronto Pearson Intl Airport from C$ 149
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 25/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
11 Jan — 18 Jan1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Lambert-St Louis to Toronto Pearson Intl are usually found in May or July, booked 12 days in advance, depart on a Wednesday or Thursday and return on a Thursday
Cheap flight deals from St. Louis to Pearson Intl
Enter your travel dates to find the best prices.
Cheapest flights from St. Louis to Pearson Intl
Explore the most affordable flight options available from St. Louis to Pearson Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 December 2025.
Thu 25/126:00 a.m.STL - YYZ
1 stop3h 56mAmerican Airlines
Tue 30/121:12 p.m.YYZ - STL
1 stop11h 32mAmerican Airlines
Deal found 11/12C$ 681
Thu 25/128:05 a.m.STL - YYZ
2 stops9h 52mUnited Airlines
Tue 30/125:30 p.m.YYZ - STL
1 stop5h 13mUnited Airlines
Deal found 10/12C$ 694
Tue 30/126:35 p.m.STL - YYZ
1 stop4h 24mAir Canada
Fri 2/16:45 p.m.YYZ - STL
1 stop4h 58mAir Canada
Deal found 11/12C$ 785
Thu 25/123:10 p.m.STL - YYZ
2 stops7h 36mAir Canada
Tue 30/124:50 p.m.YYZ - STL
1 stop5h 53mAir Canada
Deal found 11/12C$ 798
Fri 19/128:37 p.m.STL - YYZ
1 stop14h 06mMultiple Airlines
Sun 4/18:20 p.m.YYZ - STL
1 stop14h 25mMultiple Airlines
Deal found 9/12C$ 811
Tue 30/126:35 p.m.STL - YYZ
1 stop4h 24mUnited Airlines
Thu 1/19:00 a.m.YYZ - STL
2 stops14h 22mUnited Airlines
Deal found 10/12C$ 844
Sun 14/123:30 p.m.STL - YYZ
1 stop19h 13mMultiple Airlines
Tue 16/128:30 p.m.YYZ - STL
2 stops38h 10mMultiple Airlines
Deal found 10/12C$ 885
Tue 23/1211:51 a.m.STL - YYZ
1 stop22h 52mMultiple Airlines
Thu 25/127:40 a.m.YYZ - STL
2 stops15h 53mMultiple Airlines
Deal found 10/12C$ 907
Tue 23/126:35 p.m.STL - YYZ
1 stop4h 24mUnited Airlines
Thu 25/126:40 p.m.YYZ - STL
1 stop6h 03mUnited Airlines
Deal found 10/12C$ 910
Mon 15/1210:47 a.m.STL - YYZ
2 stops12h 38mMultiple Airlines
Sat 3/17:10 a.m.YYZ - STL
1 stop16h 23mMultiple Airlines
Deal found 10/12C$ 938
Best flights from St. Louis to Pearson Intl
Discover carefully curated flight deals from St. Louis to Pearson Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 December 2025.
Sun 25/15:42 p.m.STL - YYZ
2 stops25h 29mMultiple Airlines
Sun 1/28:00 p.m.YYZ - STL
1 stop25h 50mMultiple Airlines
Deal found 10/12C$ 385
Sat 14/26:35 p.m.STL - YYZ
1 stop15h 21mAmerican Airlines
Sat 21/26:00 a.m.YYZ - STL
1 stop9h 45mAmerican Airlines
Deal found 9/12C$ 484
Mon 16/34:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Fri 20/32:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 11/12C$ 647
Fri 27/39:50 a.m.STL - YYZ
2 stops10h 19mMultiple Airlines
Mon 30/37:10 a.m.YYZ - STL
1 stop17h 09mMultiple Airlines
Deal found 10/12C$ 579
Fri 6/34:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Sun 8/32:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 10/12C$ 647
Fri 27/34:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Sun 29/32:10 p.m.YYZ - STL
Nonstop2h 14mAir Canada
Deal found 11/12C$ 647
Sun 25/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Sun 1/22:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 10/12C$ 647
Thu 8/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Thu 15/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 11/12C$ 647
Sat 14/24:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Sat 21/22:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 9/12C$ 647
Direct flights from St. Louis to Pearson Intl
Explore direct flight options from St. Louis to Pearson Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 December 2025.
Mon 26/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Thu 29/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 10/12C$ 647
Mon 12/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Tue 13/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 10/12C$ 658
Fri 27/34:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Mon 30/32:10 p.m.YYZ - STL
Nonstop2h 14mAir Canada
Deal found 10/12C$ 752
Thu 23/44:05 p.m.STL - YYZ
Nonstop1h 57mAir Canada
Sun 26/42:10 p.m.YYZ - STL
Nonstop2h 14mAir Canada
Deal found 11/12C$ 761
Thu 30/44:05 p.m.STL - YYZ
Nonstop1h 57mAir Canada
Sun 3/56:55 p.m.YYZ - STL
Nonstop2h 09mAir Canada
Deal found 11/12C$ 832
Thu 15/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Mon 19/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 10/12C$ 865
Sat 7/24:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Mon 9/22:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 9/12C$ 876
Tue 13/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Mon 26/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 9/12C$ 887
Mon 5/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Thu 15/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 10/12C$ 1,025
Thu 21/52:20 p.m.STL - YYZ
Nonstop1h 58mUnited Airlines
Mon 25/56:55 p.m.YYZ - STL
Nonstop2h 09mUnited Airlines
Deal found 11/12C$ 1,219
Sat 3/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Thu 8/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 11/12C$ 1,529
Last-minute flights from St. Louis to Pearson Intl
Discover last-minute flight deals from St. Louis to Pearson Intl. Data last updated 12 December 2025 and is based on user searches.
Mon 5/110:10 p.m.STL - YYZ
2 stops36h 36mMultiple Airlines
Thu 15/17:10 a.m.YYZ - STL
1 stop16h 24mMultiple Airlines
Deal found 10/12C$ 477
Thu 8/13:43 p.m.STL - YYZ
2 stops19h 00mMultiple Airlines
Thu 15/17:10 a.m.YYZ - STL
1 stop16h 24mMultiple Airlines
Deal found 11/12C$ 356
Mon 12/11:07 p.m.STL - YYZ
1 stop16h 13mMultiple Airlines
Tue 13/13:40 p.m.YYZ - STL
2 stops16h 11mMultiple Airlines
Deal found 10/12C$ 379
Tue 13/15:11 p.m.STL - YYZ
1 stop30h 00mMultiple Airlines
Mon 26/110:15 a.m.YYZ - STL
2 stops45h 36mMultiple Airlines
Deal found 9/12C$ 405
Sun 25/15:42 p.m.STL - YYZ
2 stops25h 29mMultiple Airlines
Sun 1/28:00 p.m.YYZ - STL
1 stop25h 50mMultiple Airlines
Deal found 10/12C$ 385
Mon 26/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Thu 29/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Deal found 10/12C$ 647
Mon 26/12:50 p.m.STL - YYZ
1 stop23h 45mAlaska Airlines
Thu 29/14:45 p.m.YYZ - STL
1 stop22h 09mAlaska Airlines
Deal found 9/12C$ 656
One-way flights from St. Louis to Pearson Intl
Search for one-way flight options from St. Louis to Pearson Intl. Find affordable one-way fares based on user searches. Data last updated 12 December 2025.
Sun 25/15:42 p.m.STL - YYZ
2 stops25h 29mMultiple Airlines
Deal found 11/12C$ 149
Tue 10/34:51 p.m.STL - YYZ
1 stop20h 29mMultiple Airlines
Deal found 11/12C$ 182
Tue 13/15:11 p.m.STL - YYZ
1 stop30h 00mMultiple Airlines
Deal found 9/12C$ 193
Wed 14/18:32 p.m.STL - YYZ
2 stops38h 03mMultiple Airlines
Deal found 9/12C$ 197
Wed 14/16:44 p.m.STL - YYZ
1 stop15h 09mAmerican Airlines
Deal found 9/12C$ 205
Sat 24/16:19 p.m.STL - YYZ
1 stop20h 16mAlaska Airlines
Deal found 10/12C$ 281
Find flight deals from St. Louis to Pearson Intl
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Pearson Intl (YYZ). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 December 2025.
Customize your flight search to find flights from St. Louis to Pearson Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 12 December 2025.
Use the filters below to find and compare flights from St. Louis to Toronto Pearson Intl Airport that are best for you.
Fly from
St. Louis
Fly to
Pearson Intl
Route
Depart
Return
Price
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 25/1
5:42 p.m.-8:11 p.m.
2 stops25h 29m
Toronto Pearson Intl
Sun 1/2
8:00 p.m.-8:50 p.m.
1 stop25h 50m
C$ 385
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sat 14/2
6:35 p.m.-10:56 a.m.
1 stop15h 21m
Toronto Pearson Intl
Sat 21/2
6:00 a.m.-2:45 p.m.
1 stop9h 45m
C$ 484
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 27/3
9:50 a.m.-9:09 p.m.
2 stops10h 19m
Toronto Pearson Intl
Mon 30/3
7:10 a.m.-11:19 p.m.
1 stop17h 09m
C$ 579
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 16/3
4:05 p.m.-7:06 p.m.
Nonstop2h 01m
Toronto Pearson Intl
Fri 20/3
2:00 p.m.-3:29 p.m.
Nonstop2h 29m
C$ 647
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 6/3
4:05 p.m.-7:06 p.m.
Nonstop2h 01m
Toronto Pearson Intl
Sun 8/3
2:00 p.m.-3:29 p.m.
Nonstop2h 29m
C$ 647
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 27/3
4:05 p.m.-7:06 p.m.
Nonstop2h 01m
Toronto Pearson Intl
Sun 29/3
2:10 p.m.-3:24 p.m.
Nonstop2h 14m
C$ 647
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 25/1
4:05 p.m.-7:06 p.m.
Nonstop2h 01m
Toronto Pearson Intl
Sun 1/2
2:00 p.m.-3:29 p.m.
Nonstop2h 29m
C$ 647
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 8/1
4:05 p.m.-7:06 p.m.
Nonstop2h 01m
Toronto Pearson Intl
Thu 15/1
2:00 p.m.-3:29 p.m.
Nonstop2h 29m
C$ 647
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sat 14/2
4:05 p.m.-7:06 p.m.
Nonstop2h 01m
Toronto Pearson Intl
Sat 21/2
2:00 p.m.-3:29 p.m.
Nonstop2h 29m
C$ 647
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 25/1
5:42 p.m.-8:11 p.m.
2 stops25h 29m
C$ 149
Flights are sorted by cheapest round-trip flights first.
Deals found on 11/12
Showing 1-10 of 15 results
1
2
Best time to book a flight from St. Louis to Pearson Intl
Have a flexible travel schedule? Discover the best time to fly to Pearson Intl from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Toronto Pearson Intl Airport
How far ahead should I book a flight from St. Louis to Toronto Pearson Intl Airport?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Pearson Intl. Price data was last updated on 5 December 2025.
The best time to book flights from St. Louis to Toronto Pearson Intl Airport is 12 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from St. Louis to Toronto Pearson Intl Airport?
Currently, June is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 247). Flying from St. Louis to Toronto Pearson Intl Airport in October is currently the most expensive (average of C$ 712). 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.
What is the cheapest time of day to fly from STL to YYZ?
Find hourly flight availability from St. Louis to Pearson Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Toronto Pearson Intl Airport as you normally would.
How much does it cost to fly round-trip from St. Louis to Toronto Pearson Intl Airport?
Reviews of airlines servicing Pearson Intl
Get insights into the airlines that provide service to Pearson Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Pearson Intl. Reviews last updated 12 December 2025.
Read through reviews of airlines operating flights from St. Louis to Toronto Pearson Intl Airport, such as Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Pearson Intl. 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 Pearson Intl?
Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Toronto Pearson Intl. You should not have trouble finding flights to Toronto Pearson Intl from Lambert-St Louis; the airport handles an average of 1 outbound flight to Toronto Pearson Intl per day. You should also have plenty of airline options to choose from since 1 airline has flights from the St. Louis airport to Toronto Pearson Intl. It is only a 20.4 km journey to Lambert-St Louis (STL) from St. Louis’s city centre.
How long is the flight from St. Louis to Toronto Pearson Intl Airport?
American Airlines can get you from St. Louis to Toronto Pearson Intl Airport in just under 15h 21m. Your travel time can differ by up to . The distance between St. Louis and Toronto Pearson Intl Airport is about 1051 km.
What is the cheapest airline to fly from St. Louis to Toronto Pearson Intl Airport round-trip?
Our cheapest airline available from St. Louis to Toronto Pearson Intl Airport is Air Canada. Our recent data shows that you can find tickets from as low as C$ 294 on this airline. Air Canada is currently priced 58% below the average price you’ll pay for this route.
What are the most reliable airlines from St. Louis to Toronto Pearson Intl Airport?
Consider Air Canada (94%), Jazz (94%) or United Airlines (94%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Toronto Pearson Intl Airport.
Can I find deals for flights from St. Louis to Pearson Intl that include hotel bookings?
Yes. In addition to deals on St. Louis to Pearson Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Pearson Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Pearson Intl.
Can I find deals for business class flights from St. Louis to Pearson Intl?
Yes. Cheapflights offers flight deals from St. Louis to Pearson Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Toronto Pearson Intl Airport?
Currently, June is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 247). Flying from St. Louis to Toronto Pearson Intl Airport in October is currently the most expensive (average of C$ 712). 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.
Explore flights to Pearson Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 December 2025.
Discover the top airline that operate flights from St. Louis to Pearson Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 12 December 2025.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from St. Louis to Pearson Intl?
Deals for St. Louis to Pearson Intl 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.
Why should you use Cheapflights to find cheap flight tickets from St. Louis to Pearson Intl?
Cheapflights helps you find that perfect flight to Pearson Intl from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from St. Louis to Pearson Intl with no change fees?
Yes, we can. To see specific flights from St. Louis to Pearson Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from St. Louis to Pearson Intl become cheaper?
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!
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyze navigation, to offer and measure personalized advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review and update your choices anytime by clicking the ’Privacy Preferences’ link in the page side navigation.