Toronto

$128+ Cheap flights from St. Louis (STL) to Toronto (YTO)

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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
Apr 5 — Apr 121
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Cheapflights Tip: The best prices from Lambert-St Louis to Toronto are usually found in May or August, booked 52 days in advance, depart on a Thursday or Monday and return on a Thursday

Cheap flight deals from St. Louis to Toronto

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Toronto (YTO). 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 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$292
(Kiwi.com)

One-way from

$128
(Kiwi.com)

Popular in

March

Cheapest in

May

Average price

$583

Good round-trip deal

$835 or less

Good one-way deal

$260 or less
Provider with most accurate pricing for Lambert-St Louis-Toronto (YTO) flight deals.
Provider most trusted by Cheapflights users for Lambert-St Louis-Toronto (YTO) flights.
From Lambert-St Louis to Toronto (YTO)
One-way flight from Lambert-St Louis to Toronto (YTO)
Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Average for round-trip flights in March 2025
Price to beat on a round-trip flight from Lambert-St Louis to Toronto (YTO).
Price to beat on a one-way flight from Lambert-St Louis to Toronto (YTO).

Find flight deals from St. Louis to Toronto

Cheapest flights from St. Louis to Toronto
Explore the most affordable flight options available from St. Louis to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/1510:10 amSTL - YYZ
1 stop9h 50mMultiple Airlines
Thu 5/224:00 pmYYZ - STL
1 stop8h 52mMultiple Airlines
Deal found 3/31$292
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/185:00 amSTL - YYZ
1 stop6h 30mAmerican Airlines
Sun 5/183:45 pmYYZ - STL
1 stop4h 38mAmerican Airlines
Deal found 3/30$465
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/136:00 amSTL - YYZ
1 stop10h 59mDelta
Fri 5/237:21 pmYYZ - STL
1 stop5h 05mDelta
Deal found 3/30$473
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/27:30 amSTL - YYZ
Nonstop1h 55mAir Canada
Sun 5/411:30 amYYZ - STL
Nonstop2h 06mAir Canada
Deal found 3/30$488
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/48:10 amSTL - YYZ
2 stops9h 27mUnited Airlines
Sun 9/72:10 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 3/29$508
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/205:32 pmSTL - YYZ
1 stop5h 24mWestJet
Thu 4/249:45 amYYZ - STL
1 stop4h 16mWestJet
Deal found 3/30$524
This Alaska Airlines deal was found by Cheapflights users on 3/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/22:24 pmSTL - YYZ
2 stops23h 36mAlaska Airlines
Wed 5/74:45 pmYYZ - STL
2 stops17h 14mAlaska Airlines
Deal found 3/31$802

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Toronto 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 31, 2025.
Use the filters below to find and compare flights from St. Louis to Toronto that are best for you.

Fly from

St. Louis

Fly to

Toronto

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/15

10:10 am-9:00 pm

1 stop9h 50m

Toronto Pearson Intl

Thu 5/22

4:00 pm-11:52 pm

1 stop8h 52m

$292

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 4/22

12:55 pm-10:51 pm

1 stop8h 56m

Toronto Pearson Intl

Wed 4/30

6:15 am-2:46 pm

1 stop9h 31m

$462

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 5/18

5:00 am-12:30 pm

1 stop6h 30m

Toronto Pearson Intl

Sun 5/18

3:45 pm-7:23 pm

1 stop4h 38m

$465

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 5/2

7:30 am-10:25 am

Nonstop1h 55m

Toronto Pearson Intl

Sun 5/4

11:30 am-12:36 pm

Nonstop2h 06m

$488

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 9/4

8:10 am-6:37 pm

2 stops9h 27m

Toronto Pearson Intl

Sun 9/7

2:10 pm-3:16 pm

Nonstop2h 06m

$508

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 4/27

6:50 am-11:25 am

1 stop3h 35m

Toronto Pearson Intl

Sun 5/4

6:08 pm-9:36 pm

1 stop4h 28m

$521

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 5/2

2:24 pm-3:00 pm

2 stops23h 36m

Toronto Pearson Intl

Wed 5/7

4:45 pm-8:59 am

2 stops17h 14m

$802

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 4/8

4:57 pm-11:45 am

1 stop17h 48m

$128

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 9/23

12:00 pm-10:44 pm

1 stop9h 44m

$191

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 7/24

9:15 am-12:13 pm

Nonstop1h 58m

$213

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 12 results
1
2

Compare providers for flights from St. Louis to Toronto

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 Toronto in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust 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 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 flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Toronto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Toronto 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 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 Toronto

Have a flexible travel schedule? Discover the best time to fly to Toronto 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

How far ahead should I book a flight from St. Louis to Toronto?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Toronto. Price data was last updated on March 28, 2025.

Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Toronto. 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?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Toronto (average of $243). Flying from St. Louis to Toronto in July is currently the most expensive (average of $359). 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 YTO?

Find hourly flight availability from St. Louis to Toronto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 31, 2025.

It’s typically best to fly out from St. Louis to Toronto in the afternoon. Doing so could potentially save you 13% on the flight price compared to flying at noon, which is usually more expensive.

Rainfall in Toronto by month

Plan your trip to Toronto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Toronto ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Toronto when rainfall is around 2.0 in.

Temperature in Toronto by month

Plan your trip to Toronto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Toronto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Toronto

Get insights into the airlines that provide service to Toronto. 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 Toronto. Reviews last updated March 31, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and United Airlines from St. Louis to Toronto. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
8.0
Very good

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Toronto. 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?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Toronto. You should not have trouble finding flights to Toronto from Lambert-St Louis; the airport handles an average of 0 outbound flights to Toronto per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the St. Louis airport to Toronto. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

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

    Our cheapest airline available from St. Louis to Toronto is Delta. Our recent data shows that you can find tickets from as low as $462 on this airline. Additional options worth looking into are American Airlines and Air Canada, starting at $465 and $488 round-trip.

  • What are the cheapest airlines to fly from St. Louis to Toronto one-way?

    $191 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from $213 and $229, respectively.

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

    Consider Air Canada (71%), Jazz (71%) or United Airlines (71%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Toronto.

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

    The cheapest flight price from St. Louis to Toronto is $214. On average you can expect to pay $2,375. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $315.

  • Can I find deals for flights from St. Louis to Toronto that include hotel bookings?

    Yes. In addition to deals on St. Louis to Toronto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Toronto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Toronto.

  • Can I find deals for business class flights from St. Louis to Toronto?

    Yes. Cheapflights offers flight deals from St. Louis to Toronto 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?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Toronto (average of $243). Flying from St. Louis to Toronto in July is currently the most expensive (average of $359). 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

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Top 3 airlines flying from St. Louis to Toronto

Discover the top 3 airlines that operate flights from St. Louis to Toronto. 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 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$223Average$502FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$237Average$537FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$304Average$590FlexibilityNo cancel feeOn-time71%
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