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 $334 on this airline. Additional options worth looking into are United Airlines and Air Canada, starting at $396 and $402 round-trip. American Airlines is currently priced 17% below the average price you’ll pay for this route.

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

$176 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Delta and American Airlines, with prices starting from $211 and $261, respectively.

What is the cheapest day to fly from St. Louis to Toronto?

Travelers seeking maximum savings on their St. Louis to Toronto flight should consider departing on Thursday mornings when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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

The cheapest flight price from St. Louis to Toronto is $194. On average you can expect to pay $1,753. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $332.

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

Consider Air Canada (78%), Jazz (78%) or United Airlines (78%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Toronto.

What are the most popular airlines that fly from St. Louis to Toronto?

Consider American Airlines, Air Canada or United Airlines when booking your flight. These represent the most popular airlines when flying from St. Louis to Toronto.

What is the cheapest day to fly round-trip from St. Louis to Toronto?

Users have found that leaving on a Wednesday can be a cost-effective option. It’s possible to save up to 17% on your flight compared to booking on days when demand is much higher.

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

To save up to 400% on this flight, we recommend booking at least 53 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St. Louis to Toronto from $314 1-2 weeks out and tickets from $909 for flights departing within the next 72 hours.

What is the cheapest month to fly from St. Louis to Toronto?

May can be a great time to fly to Toronto from St. Louis with a flight ticket averaging about $402. Cheapflights users have found deals in the month of May for as cheap as $223. The most expensive prices can be found in the month of March.

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 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 flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 1 outbound flight 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.

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.

$166+ Flights from St. Louis to Toronto

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from St. Louis to Toronto 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.

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$334 (American Airlines)
One-way from	$166 (Kiwi.com)
Popular in	March
Cheapest in	May
Average price	$314
Good round-trip deal	$729 or less
Good one-way deal	$241 or less

Provider with most accurate pricing for Lambert-St Louis-Toronto (YTO) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-Toronto (YTO) flights.

Search Deals

From Lambert-St Louis to Toronto (YTO)

Search Deals

One-way flight from Lambert-St Louis to Toronto (YTO)

Search Deals

Highest demand for flights based on searches. 3% potential increase in price ($12 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Lambert-St Louis to Toronto (YTO).

Search Deals

Price to beat on a one-way flight from Lambert-St Louis to Toronto (YTO).

Search Deals

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 April 24, 2025.

Thu 5/225:00 amSTL - YYZ

1 stop11h 35mAmerican Airlines

Thu 5/293:10 pmYYZ - STL

1 stop9h 41mAmerican Airlines

Deal found 4/23

$334

Thu 5/89:50 amSTL - YYZ

2 stops10h 18mMultiple Airlines

Fri 5/97:00 amYYZ - STL

3 stops27h 15mMultiple Airlines

Deal found 4/23

$368

Mon 6/96:30 amSTL - YYZ

1 stop8h 16mUnited Airlines

Mon 6/99:00 pmYYZ - STL

1 stop19h 30mUnited Airlines

Deal found 4/23

$396

Sun 6/17:30 amSTL - YYZ

Nonstop1h 55mAir Canada

Fri 6/611:30 amYYZ - STL

Nonstop2h 06mAir Canada

Deal found 4/22

$402

Thu 9/2510:45 amSTL - YYZ

1 stop5h 38mDelta

Sun 9/286:15 amYYZ - STL

1 stop5h 56mDelta

Deal found 4/24

$446

Mon 6/26:00 amSTL - YYZ

2 stops11h 04mWestJet

Wed 6/410:20 amYYZ - STL

1 stop5h 48mWestJet

Deal found 4/22

$573

Fri 6/66:18 pmSTL - YYZ

1 stop19h 42mAlaska Airlines

Tue 6/104:45 pmYYZ - STL

2 stops16h 20mAlaska Airlines

Deal found 4/23

$773

Best flights from St. Louis to Toronto
Discover carefully curated flight deals from St. Louis to Toronto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2025.

Tue 6/106:00 amSTL - YYZ

1 stop10h 40mAmerican Airlines

Thu 6/123:14 pmYYZ - STL

1 stop9h 40mAmerican Airlines

Deal found 4/23

$334

Thu 5/89:50 amSTL - YYZ

2 stops10h 18mMultiple Airlines

Fri 5/97:00 amYYZ - STL

3 stops27h 15mMultiple Airlines

Deal found 4/23

$368

Mon 6/96:30 amSTL - YYZ

1 stop8h 16mUnited Airlines

Mon 6/99:00 pmYYZ - STL

1 stop19h 30mUnited Airlines

Deal found 4/23

$396

Sun 6/17:30 amSTL - YYZ

Nonstop1h 55mAir Canada

Fri 6/611:30 amYYZ - STL

Nonstop2h 06mAir Canada

Deal found 4/22

$402

Wed 5/216:00 amSTL - YYZ

1 stop6h 40mDelta

Wed 5/2810:20 amYYZ - STL

2 stops11h 29mDelta

Deal found 4/23

$498

Mon 6/91:30 pmSTL - YYZ

2 stops25h 22mWestJet

Wed 6/116:30 amYYZ - STL

1 stop5h 23mWestJet

Deal found 4/23

$510

Fri 6/66:18 pmSTL - YYZ

1 stop19h 42mAlaska Airlines

Tue 6/104:45 pmYYZ - STL

2 stops16h 20mAlaska Airlines

Deal found 4/23

$773

Last-minute flights from St. Louis to Toronto
Discover last-minute flight deals from St. Louis to Toronto. Data last updated April 24, 2025 and is based on user searches.

Tue 4/296:59 pmSTL - YYZ

1 stop13h 31mDelta

Thu 5/810:20 amYYZ - STL

1 stop11h 28mDelta

Deal found 4/23

$532

Tue 4/295:32 pmSTL - YYZ

2 stops28h 22mWestJet

Thu 5/812:15 pmYYZ - STL

1 stop5h 32mWestJet

Deal found 4/23

$864

Tue 4/293:30 pmSTL - YYZ

Nonstop2h 00mAir Canada

Thu 5/82:00 pmYYZ - STL

1 stop6h 58mAir Canada

Deal found 4/23

$894

Tue 4/299:41 amSTL - YYZ

2 stops28h 19mAlaska Airlines

Thu 5/84:45 pmYYZ - STL

2 stops26h 48mAlaska Airlines

Deal found 4/23

$1,487

Fri 5/212:03 pmSTL - YYZ

1 stop9h 57mAmerican Airlines

Sun 5/412:55 pmYYZ - STL

1 stop8h 52mAmerican Airlines

Deal found 4/23

$678

Fri 5/28:00 amSTL - YYZ

1 stop4h 42mUnited Airlines

Sun 5/45:30 pmYYZ - STL

2 stops23h 17mUnited Airlines

Deal found 4/23

$868

Thu 5/89:50 amSTL - YYZ

2 stops10h 18mMultiple Airlines

Fri 5/97:00 amYYZ - STL

3 stops27h 15mMultiple Airlines

Deal found 4/23

$368

Wed 5/216:00 amSTL - YYZ

1 stop6h 40mDelta

Wed 5/2810:20 amYYZ - STL

2 stops11h 29mDelta

Deal found 4/23

$498

Thu 5/225:00 amSTL - YYZ

1 stop11h 35mAmerican Airlines

Thu 5/293:10 pmYYZ - STL

1 stop9h 41mAmerican Airlines

Deal found 4/23

$334

Wed 5/286:05 pmSTL - YYZ

2 stops14h 52mWestJet

Fri 5/3010:30 pmYYZ - STL

2 stops13h 22mWestJet

Deal found 4/22

$658

Thu 5/295:00 amSTL - YYZ

1 stop7h 42mUnited Airlines

Sun 6/111:30 amYYZ - STL

Nonstop2h 06mUnited Airlines

Deal found 4/23

$478

Thu 5/297:30 amSTL - YYZ

Nonstop1h 55mAir Canada

Sun 6/111:30 amYYZ - STL

Nonstop2h 06mAir Canada

Deal found 4/24

$490

One-way flights from St. Louis to Toronto
Search for one-way flight options from St. Louis to Toronto. Find affordable one-way fares based on user searches. Data last updated April 24, 2025.

Thu 5/89:50 amSTL - YYZ

2 stops10h 18mMultiple Airlines

Deal found 4/23

$166

Sun 5/187:30 amSTL - YYZ

Nonstop1h 55mAir Canada

Deal found 4/22

$176

Sun 5/186:00 amSTL - YYZ

1 stop4h 40mDelta

Deal found 4/22

$211

Sat 5/39:21 amSTL - YYZ

1 stop8h 14mAmerican Airlines

Deal found 4/23

$261

Tue 4/291:00 pmSTL - YYZ

2 stops17h 42mUnited Airlines

Deal found 4/23

$333

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Toronto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/22

5:00 am-5:35 pm

1 stop11h 35m

Toronto Pearson Intl

Thu 5/29

3:10 pm-11:51 pm

1 stop9h 41m

$334

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/8

9:50 am-9:08 pm

2 stops10h 18m

Toronto Pearson Intl

Fri 5/9

7:00 am-9:15 am

3 stops27h 15m

$368

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 6/9

6:30 am-3:46 pm

1 stop8h 16m

Toronto Pearson Intl

Mon 6/9

9:00 pm-3:30 pm

1 stop19h 30m

$396

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 6/1

7:30 am-10:25 am

Nonstop1h 55m

Toronto Pearson Intl

Fri 6/6

11:30 am-12:36 pm

Nonstop2h 06m

$402

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 9/25

10:45 am-5:23 pm

1 stop5h 38m

Toronto Pearson Intl

Sun 9/28

6:15 am-11:11 am

1 stop5h 56m

$446

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 6/2

6:00 am-6:04 pm

2 stops11h 04m

Toronto Pearson Intl

Wed 6/4

10:20 am-3:08 pm

1 stop5h 48m

$573

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 6/6

6:18 pm-3:00 pm

1 stop19h 42m

Toronto Pearson Intl

Tue 6/10

4:45 pm-8:05 am

2 stops16h 20m

$773

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/8

9:50 am-9:08 pm

2 stops10h 18m

$166

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 5/18

7:30 am-10:25 am

Nonstop1h 55m

$176

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 9/19

5:40 pm-11:53 pm

1 stop5h 13m

$195

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 13 results

Compare providers for flights from St. Louis to Toronto

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 April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Trip.com	Price Accuracy1 star	Trust 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 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 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?

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?

It’s typically best to fly out from St. Louis to Toronto in the afternoon. Doing so could potentially save you 15% on the flight price compared to flying at noon, which is usually more expensive.

Weekly flight availability from St. Louis to Toronto

The most flights from STL to YTO are scheduled on a Monday (2 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Toronto 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

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

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.

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,918 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,920 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,685 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

WestJet

7.2

Good

2,816 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

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 1 outbound flight 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 $334 on this airline. Additional options worth looking into are United Airlines and Air Canada, starting at $396 and $402 round-trip. American Airlines is currently priced 17% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from St. Louis to Toronto one-way?
$176 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Delta and American Airlines, with prices starting from $211 and $261, respectively.
What are the most reliable airlines from St. Louis to Toronto?
Consider Air Canada (78%), Jazz (78%) or United Airlines (78%) 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 $194. On average you can expect to pay $1,753. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $332.
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

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from St. Louis to Toronto

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$214	Average$492	FlexibilityNo cancel fee	On-time67%
United Airlines	Cheapest$237	Average$533	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$304	Average$621	FlexibilityNo cancel fee	On-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.

$166+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Toronto with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from St. Louis to Toronto

Cheapest flights from St. Louis to TorontoExplore 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 April 24, 2025.

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 April 24, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Toronto that are best for you.

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 April.

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.

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 April 18, 2025.

What is the cheapest month to book a flight from St. Louis to Toronto?

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 April 24, 2025.

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 April 24, 2025.

Rainfall in Toronto by month

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

Temperature in Toronto by month

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

Reviews of airlines servicing Toronto

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.

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?

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

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

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

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

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

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

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

What is the cheapest month to book a flight from St. Louis to Toronto?

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 Toronto

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from St. Louis to Toronto

100% Free

Book with Flexibility

Travel Smart

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 April 24, 2025.