HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Pearson Intl

$161+ Cheap flights from St. Louis (STL) to Pearson Intl (YYZ)

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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Apr 29 — May 61
Wed 4/29
Wed 5/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Pearson Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to Pearson Intl

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 March 30, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/204:59 pm
STL
-
YYZ
1 stop20h 09m
Multiple Airlines
Mon 5/48:10 am
YYZ
-
STL
2 stops34h 26m
Multiple Airlines
Deal found 3/29$372
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:55 pm
STL
-
YYZ
2 stops25h 00m
Multiple Airlines
Thu 5/217:45 am
YYZ
-
STL
1 stop17h 36m
Multiple Airlines
Deal found 3/30$382
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/154:59 pm
STL
-
YYZ
1 stop20h 17m
Multiple Airlines
Mon 4/2011:15 am
YYZ
-
STL
2 stops37h 04m
Multiple Airlines
Deal found 3/30$388
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/204:59 pm
STL
-
YYZ
1 stop20h 09m
Multiple Airlines
Wed 4/2211:15 am
YYZ
-
STL
2 stops24h 15m
Multiple Airlines
Deal found 3/30$392
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:27 pm
STL
-
YYZ
2 stops26h 28m
Multiple Airlines
Tue 5/199:45 am
YYZ
-
STL
1 stop33h 21m
Multiple Airlines
Deal found 3/30$403
This American Airlines deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:05 am
STL
-
YYZ
1 stop10h 28m
American Airlines
Tue 5/191:15 pm
YYZ
-
STL
1 stop11h 41m
American Airlines
Deal found 3/28$407
This American Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
STL
-
YYZ
1 stop9h 44m
American Airlines
Thu 6/47:20 am
YYZ
-
STL
1 stop10h 10m
American Airlines
Deal found 3/26$408
This Kiwi.com deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:33 pm
STL
-
YYZ
2 stops26h 32m
Multiple Airlines
Tue 5/199:45 am
YYZ
-
STL
1 stop33h 21m
Multiple Airlines
Deal found 3/28$410
This Kiwi.com deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/94:59 pm
STL
-
YYZ
1 stop20h 21m
Multiple Airlines
Sun 4/128:20 pm
YYZ
-
STL
1 stop12h 31m
Multiple Airlines
Deal found 3/26$411
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/34:19 pm
STL
-
YYZ
1 stop21h 11m
Multiple Airlines
Sun 6/144:45 pm
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 3/29$414

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 March 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$372
(Kiwi.com)

One-way from

$161
(Kiwi.com)

Popular in

January

Cheapest in

March

Average price

$310

Good round-trip deal

$794 or less

Good one-way deal

$450 or less
Provider with most accurate pricing for Lambert-St Louis-Toronto Pearson Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Toronto Pearson Intl flights.
Search Deals
From Lambert-St Louis to Toronto Pearson Intl
Search Deals
One-way flight from Lambert-St Louis to Toronto Pearson Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to Toronto Pearson Intl.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Toronto Pearson Intl.
Search Deals

Cheapflights Fare Finder

 
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 2,558,603 searches. Data last updated March 30, 2026.
Use the filters below to find and compare flights from St. Louis to Toronto Pearson Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 5/13

12:27 pm-11:29 pm

1 stop10h 02m

Toronto Pearson Intl

Tue 5/19

3:13 pm-10:19 pm

1 stop8h 06m

$407
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 5/13

2:15 pm-5:13 pm

Nonstop1h 58m

Toronto Pearson Intl

Tue 5/19

7:00 pm-8:09 pm

Nonstop2h 09m

$559

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 9/2

12:00 pm-11:22 pm

1 stop10h 22m

Toronto Pearson Intl

Wed 9/9

11:30 am-6:02 pm

1 stop7h 32m

$562

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 5/5

6:30 am-5:00 pm

1 stop9h 30m

Toronto Pearson Intl

Wed 5/6

2:45 pm-9:13 pm

1 stop7h 28m

$563

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 7/30

5:19 pm-11:58 pm

1 stop5h 39m

Toronto Pearson Intl

Sun 8/2

6:30 am-10:28 am

1 stop4h 58m

$566

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 6/11

6:05 am-4:14 pm

1 stop9h 09m

Toronto Pearson Intl

Sat 6/13

12:11 pm-9:54 pm

1 stop10h 43m

$566

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 7/28

12:28 pm-11:44 pm

1 stop10h 16m

Toronto Pearson Intl

Wed 8/5

6:00 am-3:30 pm

1 stop10h 30m

$576

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 4/11

1:10 pm-11:54 pm

2 stops9h 44m

Toronto Pearson Intl

Sun 4/12

7:00 am-10:45 am

1 stop4h 45m

$594
Cheapest one-way

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 4/14

4:59 pm-2:16 pm

1 stop20h 17m

$162

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 4/20

4:59 pm-2:08 pm

1 stop20h 09m

$172

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from St. Louis to Pearson Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Pearson Intl in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Toronto Pearson Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Toronto Pearson Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Toronto Pearson Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Toronto Pearson Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Toronto Pearson Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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 $177). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of $781). 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 March 30, 2026.

When flying from St. Louis to Toronto Pearson Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

The best insider tips for St. Louis to Toronto Pearson Intl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Toronto Pearson Intl Airport trip
Our travel experts
Taryn White

Taryn White

Expert on STL

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more
Kaitlyn McInnis

Kaitlyn McInnis

Expert on YYZ

Kaitlyn is a guidebook author and travel writer splitting her time between Atlantic Canada and Istanbul, Türkiye. She has visited over fifty countries and all seven continents, so she is very familiar with many hotels, airports and airlines around the globe. But her favorite type of vacation is sunbathing by the sea with a good book in hand.

Read more

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 March 30, 2026.
Read reviews from past customers who have flown United Airlines,American Airlines, andAir Canada from St. Louis to Toronto Pearson Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,514 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,514 reviews
United Airlines
7.4
Good
9,514 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.1
Good
11,530 reviews
United Airlines
7.4
Good
9,514 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Air Canada
7.1
Good
10,862 reviews
United Airlines
7.4
Good
9,514 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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?

    If you book a flight to Toronto Pearson Intl from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 2 flights from Lambert-St Louis to Toronto Pearson Intl per day from 3 different airlines.

  • How long is the flight from St. Louis to Toronto Pearson Intl Airport?

    Airlines like American Airlines, Air Canada, and Delta fly from St. Louis to Toronto Pearson Intl Airport in about 1h 58m. The time it takes to get you to your destination can typically vary by up to 8h 24m. The distance from St. Louis to Toronto Pearson Intl Airport is about 653 mi. This flight may include one or multiple stops.

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

    Flying on United Airlines is currently your cheapest option to Toronto Pearson Intl Airport, with prices starting at $199. Additional round-trip tickets that might be worth considering are offered by Air Canada and American Airlines, with the lowest prices starting at $220 and $270, respectively. United Airlines is priced at 63% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from St. Louis to Toronto Pearson Intl Airport?

    Before booking your flight to Toronto Pearson Intl Airport from St. Louis, check out the most reliable airlines to get you to your destination on time: United Airlines (72%), Air Canada (71%), Jazz( 71%).

  • What are the cheapest flights from St. Louis to Toronto Pearson Intl Airport?

    The cheapest flight price from St. Louis to Toronto Pearson Intl Airport is $267. On average you can expect to pay $774. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $372.

  • 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 $177). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of $781). 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.

See more FAQs

Traveling to a place near Toronto Pearson Intl Airport?

Book flights to Toronto Pearson Intl Airport if you plan to visit one of these locations
Brampton
Kitchener
Collingwood
Markham
Oakville
Brantford
Vaughan
Pickering
Lindsay
Peterborough
Ajax
Barrie
Cambridge
Milton
Burlington
Oshawa
Orillia
Owen Sound
Richmond Hill
Gravenhurst

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Pearson Intl

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Pearson Intl flights
Kansas City to Toronto Island flights
Columbia to Pearson Intl flights

Top 3 airlines flying from St. Louis to Pearson Intl

Discover the top 3 airlines 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 2,558,603 searches. Data last updated March 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$199Average$448FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$220Average$564FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$270Average$558FlexibilityNo cancel feeOn-time71%

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.
Site
©2026 Cheapflights