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Pearson Intl

$139+ 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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Jan 9 — Jan 161
Fri 1/9
Fri 1/16
1 adult, Economy
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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 Tuesday or Sunday and return on a Saturday

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 December 10, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/7. 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 12/2310:48 amSTL - YYZ
2 stops26h 52mMultiple Airlines
Wed 1/77:15 amYYZ - STL
1 stop16h 18mMultiple Airlines
Deal found 12/7$409
This Kiwi.com deal was found by Cheapflights users on 12/8. 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.
Sat 12/2010:10 pmSTL - YYZ
2 stops39h 10mMultiple Airlines
Fri 1/167:10 amYYZ - STL
1 stop16h 24mMultiple Airlines
Deal found 12/8$426
This American Airlines deal was found by Cheapflights users on 12/7. 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 12/235:30 amSTL - YYZ
1 stop9h 00mAmerican Airlines
Wed 1/711:30 amYYZ - STL
1 stop7h 44mAmerican Airlines
Deal found 12/7$487
This United Airlines deal was found by Cheapflights users on 12/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:35 pmSTL - YYZ
1 stop4h 24mUnited Airlines
Fri 12/262:45 pmYYZ - STL
1 stop5h 37mUnited Airlines
Deal found 12/8$493
This American Airlines deal was found by Cheapflights users on 12/9. 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 12/235:30 amSTL - YYZ
1 stop9h 00mAmerican Airlines
Thu 12/256:00 amYYZ - STL
1 stop14h 30mAmerican Airlines
Deal found 12/9$494
This American Airlines deal was found by Cheapflights users on 12/8. 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.
Wed 12/242:04 pmSTL - YYZ
1 stop20h 05mAmerican Airlines
Sun 12/2810:56 amYYZ - STL
1 stop11h 49mAmerican Airlines
Deal found 12/8$497
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:05 amSTL - YYZ
2 stops9h 52mUnited Airlines
Tue 12/305:30 pmYYZ - STL
1 stop5h 13mUnited Airlines
Deal found 12/9$503
This Kiwi.com deal was found by Cheapflights users on 12/9. 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.
Fri 12/121:16 pmSTL - YYZ
2 stops21h 27mMultiple Airlines
Sun 12/148:00 pmYYZ - STL
1 stop27h 33mMultiple Airlines
Deal found 12/9$512
This Air Canada deal was found by Cheapflights users on 12/7. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:02 pmSTL - YYZ
1 stop5h 07mAir Canada
Wed 1/72:00 pmYYZ - STL
Nonstop2h 29mAir Canada
Deal found 12/7$553

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 December 10, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$283
(Kiwi.com)

One-way from

$139
(Kiwi.com)

Popular in

October

Cheapest in

May

Average price

$492

Good round-trip deal

$634 or less

Good one-way deal

$420 or less
Provider with most accurate pricing for Lambert-St Louis-Toronto Pearson Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Toronto Pearson Intl flights.
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From Lambert-St Louis to Toronto Pearson Intl
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One-way flight from Lambert-St Louis to Toronto Pearson Intl
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Highest demand for flights based on searches. 6% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to Toronto Pearson Intl.
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Price to beat on a one-way flight from Lambert-St Louis to Toronto Pearson Intl.
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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 December 10, 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 1/18

10:09 pm-6:20 am

1 stop31h 11m

Toronto Pearson Intl

Wed 1/21

7:15 am-11:33 pm

1 stop17h 18m

$283

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 1/23

5:42 pm-2:20 pm

1 stop19h 38m

Toronto Pearson Intl

Fri 1/30

7:15 am-11:33 pm

2 stops17h 18m

$315

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 1/13

5:11 pm-12:11 am

1 stop30h 00m

Toronto Pearson Intl

Mon 1/26

7:10 am-11:33 pm

1 stop17h 23m

$339

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/14

6:35 pm-10:56 am

1 stop15h 21m

Toronto Pearson Intl

Sat 2/21

11:38 am-6:02 pm

1 stop7h 24m

$350

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/7

12:12 pm-11:35 am

2 stops22h 23m

Toronto Pearson Intl

Mon 2/9

5:15 pm-11:33 pm

1 stop7h 18m

$425

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 1/23

4:05 pm-7:06 pm

Nonstop2h 01m

Toronto Pearson Intl

Fri 1/30

2:50 pm-8:58 pm

1 stop7h 08m

$451

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/14

4:05 pm-7:06 pm

Nonstop2h 01m

Toronto Pearson Intl

Sat 2/21

2:00 pm-3:29 pm

Nonstop2h 29m

$468

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 1/26

4:05 pm-7:06 pm

Nonstop2h 01m

Toronto Pearson Intl

Thu 1/29

2:00 pm-3:29 pm

Nonstop2h 29m

$468

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 3/6

4:05 pm-7:06 pm

Nonstop2h 01m

Toronto Pearson Intl

Sun 3/8

2:00 pm-3:29 pm

Nonstop2h 29m

$469

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 1/23

5:42 pm-2:20 pm

1 stop19h 38m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 14 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Toronto Pearson Intl Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

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 December 5, 2025.

Booking 12 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Toronto Pearson Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 $179). Flying from St. Louis to Toronto Pearson Intl Airport in October is currently the most expensive (average of $516). 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 December 10, 2025.

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.

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
Airports
STL

Expect security screening at STL to take 5-10 minutes off-peak, but up to 15 minutes during peak times. Check wait times online before heading to the airport.

Read more about STLBy Taryn White
YYZ

For a quick customs experience at YYZ, expect some walking from your gate to customs. Assistance is available for those with mobility concerns.

Read more about YYZBy Kaitlyn McInnis
Our travel experts
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

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 McInnis

Kaitlyn McInnis

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 December 10, 2025.
Read reviews from past customers who have flown United Airlines, American Airlines, and Air 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
9,092 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,092 reviews
United Airlines
7.4
Good
9,092 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
American Airlines
7.2
Good
11,047 reviews
United Airlines
7.4
Good
9,092 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Air Canada
7.1
Good
10,513 reviews
United Airlines
7.4
Good
9,092 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 is 1 flight 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 fly from St. Louis to Toronto Pearson Intl Airport in about 15h 21m. The time it takes to get you to your destination can typically vary by up to . The distance from St. Louis to Toronto Pearson Intl Airport is about 653 mi.

  • 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 $214 and $270, respectively. United Airlines is priced at 61% 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: Air Canada (94%), Jazz (94%), United Airlines( 94%).

  • 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 $209. On average you can expect to pay $1,293. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $283.

  • 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 $179). Flying from St. Louis to Toronto Pearson Intl Airport in October is currently the most expensive (average of $516). 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
Markham
Collingwood
Oakville
Brantford
Pickering
Lindsay
Peterborough
Barrie
Cambridge
Milton
Oshawa
Burlington
Owen Sound
Ajax
Orillia
Vaughan
Richmond Hill
Gravenhurst

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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 December 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$199Average$503FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$220Average$534FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$270Average$558FlexibilityNo cancel feeOn-time71%

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