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$141+ 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Toronto are usually found in January or April, booked 52 days in advance, depart on a Thursday or Tuesday and return on a Saturday

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 June 12, 2025.

Round-trip from

$302
(Mytrip)

One-way from

$141
(American Airlines)

Popular in

March

Cheapest in

January

Average price

$397

Good round-trip deal

$692 or less

Good one-way deal

$177 or less
From Lambert-St Louis to Toronto (YTO)
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One-way flight from Lambert-St Louis to Toronto (YTO)
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High demand for flights, 2% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Toronto (YTO).
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Price to beat on a one-way flight from Lambert-St Louis to Toronto (YTO).
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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 June 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/911:24 amSTL - YYZ
2 stops25h 41mMultiple Airlines
Tue 7/156:30 amYYZ - STL
1 stop11h 01mMultiple Airlines
Deal found 6/10$302
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Mon 9/155:55 amSTL - YYZ
1 stop10h 54mAmerican Airlines
Wed 9/1711:44 amYYZ - STL
1 stop11h 09mAmerican Airlines
Deal found 6/11$337
This Sun Country Air deal was found by Cheapflights users on 6/9. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/296:12 amSTL - YYZ
1 stop9h 38mSun Country Air
Thu 7/311:40 amYYZ - STL
1 stop24h 50mSun Country Air
Deal found 6/9$362
This Air Canada deal was found by Cheapflights users on 6/10. 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.
Sun 6/227:30 amSTL - YYZ
Nonstop1h 55mAir Canada
Thu 6/2611:30 amYYZ - STL
Nonstop2h 06mAir Canada
Deal found 6/10$372
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Fri 6/205:20 amSTL - YYZ
1 stop8h 51mUnited Airlines
Fri 6/205:15 pmYYZ - STL
1 stop6h 30mUnited Airlines
Deal found 6/10$373
This Delta deal was found by Cheapflights users on 6/10. 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.
Fri 6/206:40 amSTL - YYZ
1 stop7h 01mDelta
Sat 6/213:31 pmYYZ - STL
1 stop5h 59mDelta
Deal found 6/10$397

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 June 12, 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

Wed 7/9

11:24 am-2:05 pm

2 stops25h 41m

Toronto Pearson Intl

Tue 7/15

6:30 am-4:31 pm

1 stop11h 01m

$302

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 9/15

5:55 am-5:49 pm

1 stop10h 54m

Toronto Pearson Intl

Wed 9/17

11:44 am-9:53 pm

1 stop11h 09m

$337

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 6/29

6:12 am-4:50 pm

1 stop9h 38m

Toronto Pearson Intl

Thu 7/3

11:40 am-11:30 am

1 stop24h 50m

$362

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 6/22

7:30 am-10:25 am

Nonstop1h 55m

Toronto Pearson Intl

Thu 6/26

11:30 am-12:36 pm

Nonstop2h 06m

$372

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 9/25

12:25 pm-9:02 pm

1 stop7h 37m

Toronto Pearson Intl

Sun 9/28

2:10 pm-2:27 pm

1 stop25h 17m

$394

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 6/27

6:40 am-2:41 pm

1 stop7h 01m

Toronto Pearson Intl

Wed 7/23

11:29 am-4:18 pm

1 stop5h 49m

$498

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 9/25

5:55 am-5:49 pm

1 stop10h 54m

$141

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 7/24

10:47 am-9:23 pm

2 stops33h 36m

$148

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 7/6

6:36 am-4:50 pm

1 stop9h 14m

$153

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 6/30

7:30 am-10:25 am

Nonstop1h 55m

$161

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 11 results
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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 June 9, 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 $353). 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 June 12, 2025.

It’s typically best to fly out from St. Louis to Toronto in the afternoon. Doing so could potentially save you 21% on the flight price compared to flying at noon, which is usually more expensive.

Weekly flight availability from St. Louis to Toronto

Explore weekly flight availability from St. Louis to Toronto. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.

The most flights from STL to YTO are scheduled on a Wednesday (4 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 on average).

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 June 12, 2025.
Read reviews from past customers who have flown Delta, United Airlines and American 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.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,531 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Sun Country Air
6.9
Okay
345 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 3 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 American Airlines. Our recent data shows that you can find tickets from as low as $337 on this airline. Additional options worth looking into are Sun Country Air and Air Canada, starting at $362 and $372 round-trip. American Airlines is currently priced 20% below the average price you’ll pay for this route.

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

    $141 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Sun Country Air and Air Canada, with prices starting from $153 and $205, respectively.

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

    Consider United Airlines (73%), Air Canada (50%) or Jazz (37%) 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 $177. On average you can expect to pay $2,125. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $312.

  • 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 $353). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$220Average$504FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$220Average$481FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$304Average$612FlexibilityNo cancel feeOn-time71%

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