How long is the flight from St. Louis to Toronto?

For as low as $276, American Airlines can have you in Toronto from St. Louis in 11h 29m. St. Louis and Toronto are separated by a distance of 653 mi.

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

Our cheapest airline available from St. Louis to Toronto is United Airlines. Our recent data shows that you can find tickets from as low as $214 on this airline. Additional options worth looking into are Air Canada and American Airlines, starting at $221 and $391 round-trip. United Airlines is currently priced 52% below the average price you’ll pay for this route.

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.

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).

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

The cheapest flight price from St. Louis to Toronto is $141. On average you can expect to pay $1,431. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $294.

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

Consider Air Canada (93%), Jazz (93%) or United Airlines (93%) 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 Air Canada, United Airlines or American Airlines when booking your flight. These represent the most popular airlines when flying from St. Louis to Toronto.

Most accurate provider : When it comes to deals on St. Louis-Toronto 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 flight deals on Cheapflights vs. eDreams >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.

$108+ Cheap Flights from St. Louis to Toronto

Q: How much does it cost to fly round-trip from St. Louis to Toronto?

Airfare is below average for this route at the moment. St. Louis to Toronto flights typically cost between $263 and $710 in January. The cheapest round-trip price found within the last 3 days was $241 on Multiple Airlines (Jan 14-Jan 17).

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 January or April, booked 52 days in advance, depart on a Tuesday or Sunday and return on a Tuesday

Cheap flight deals from St. Louis to Toronto

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$241 (Kiwi.com)
One-way from	$108 (Mytrip)
Popular in	March
Cheapest in	January
Average price	$544
Good round-trip deal	$620 or less
Good one-way deal	$179 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

High demand for flights, 9% potential price rise

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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 October 29, 2025.

Mon 12/155:15 amSTL - YYZ

1 stop11h 29mAmerican Airlines

Thu 1/81:14 pmYYZ - STL

1 stop9h 01mAmerican Airlines

Deal found 10/27

$276

Mon 12/1510:47 amSTL - YYZ

2 stops36h 24mMultiple Airlines

Thu 1/87:10 amYYZ - STL

1 stop16h 23mMultiple Airlines

Deal found 10/27

$295

Thu 12/43:30 pmSTL - YYZ

1 stop7h 41mMultiple Airlines

Mon 12/812:50 pmYYZ - STL

1 stop10h 43mMultiple Airlines

Deal found 10/28

$301

Mon 11/179:50 amSTL - YYZ

2 stops10h 17mMultiple Airlines

Fri 11/217:00 amYYZ - STL

1 stop26h 57mMultiple Airlines

Deal found 10/28

$316

Thu 12/112:47 pmSTL - YYZ

1 stop22h 53mMultiple Airlines

Sun 12/148:20 pmYYZ - STL

2 stops14h 32mMultiple Airlines

Deal found 10/27

$337

Wed 12/107:43 pmSTL - YYZ

2 stops27h 28mMultiple Airlines

Wed 12/177:10 amYYZ - STL

1 stop16h 23mMultiple Airlines

Deal found 10/27

$354

Mon 11/179:50 amSTL - YYZ

2 stops10h 17mMultiple Airlines

Thu 11/205:15 pmYYZ - STL

1 stop7h 42mMultiple Airlines

Deal found 10/28

$358

Fri 12/123:30 pmSTL - YYZ

1 stop19h 13mMultiple Airlines

Mon 12/155:15 pmYYZ - STL

1 stop30h 18mMultiple Airlines

Deal found 10/27

$361

Sun 11/166:21 pmSTL - YYZ

2 stops25h 46mMultiple Airlines

Thu 11/205:15 pmYYZ - STL

1 stop7h 42mMultiple Airlines

Deal found 10/28

$362

Mon 12/14:13 pmSTL - YYZ

1 stop6h 58mMultiple Airlines

Thu 12/49:35 amYYZ - STL

1 stop27h 37mMultiple Airlines

Deal found 10/29

$371

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 October 29, 2025.

Mon 12/155:15 amSTL - YYZ

1 stop11h 29mAmerican Airlines

Thu 1/81:14 pmYYZ - STL

1 stop9h 01mAmerican Airlines

Deal found 10/27

$276

Wed 1/145:06 pmSTL - YYZ

1 stop20h 14mMultiple Airlines

Sat 1/172:20 pmYYZ - STL

2 stops20h 26mMultiple Airlines

Deal found 10/27

$296

Sat 2/146:33 pmSTL - YYZ

1 stop15h 24mAmerican Airlines

Sat 2/2111:38 amYYZ - STL

1 stop7h 25mAmerican Airlines

Deal found 10/26

$279

Mon 11/179:50 amSTL - YYZ

2 stops10h 17mMultiple Airlines

Fri 11/217:00 amYYZ - STL

1 stop26h 57mMultiple Airlines

Deal found 10/28

$316

Wed 12/105:05 amSTL - YYZ

1 stop9h 58mAmerican Airlines

Wed 12/176:00 amYYZ - STL

1 stop10h 29mAmerican Airlines

Deal found 10/27

$316

Sun 2/15:11 pmSTL - YYZ

1 stop20h 09mMultiple Airlines

Tue 2/101:30 pmYYZ - STL

2 stops28h 19mMultiple Airlines

Deal found 10/27

$325

Thu 12/412:04 pmSTL - YYZ

2 stops11h 07mMultiple Airlines

Mon 12/87:15 amYYZ - STL

1 stop16h 18mMultiple Airlines

Deal found 10/28

$325

Thu 2/1912:20 pmSTL - YYZ

1 stop10h 00mMultiple Airlines

Mon 2/238:20 pmYYZ - STL

2 stops38h 42mMultiple Airlines

Deal found 10/27

$331

Tue 2/177:00 amSTL - YYZ

1 stop5h 02mAmerican Airlines

Sat 2/2111:38 amYYZ - STL

1 stop7h 25mAmerican Airlines

Deal found 10/27

$381

Thu 12/112:47 pmSTL - YYZ

1 stop22h 53mMultiple Airlines

Sun 12/148:20 pmYYZ - STL

2 stops14h 32mMultiple Airlines

Deal found 10/27

$337

Thu 2/512:20 pmSTL - YYZ

1 stop10h 00mMultiple Airlines

Sun 2/88:00 pmYYZ - STL

2 stops15h 02mMultiple Airlines

Deal found 10/27

$363

Thu 11/137:02 pmSTL - YYZ

1 stop18h 38mMultiple Airlines

Sun 11/167:10 amYYZ - STL

1 stop27h 30mMultiple Airlines

Deal found 10/27

$383

Last-minute flights from St. Louis to Toronto
Discover last-minute flight deals from St. Louis to Toronto. Data last updated October 29, 2025 and is based on user searches.

Thu 11/137:02 pmSTL - YYZ

1 stop18h 38mMultiple Airlines

Sun 11/167:10 amYYZ - STL

1 stop27h 30mMultiple Airlines

Deal found 10/27

$383

Sun 11/166:21 pmSTL - YYZ

2 stops25h 46mMultiple Airlines

Thu 11/205:15 pmYYZ - STL

1 stop7h 42mMultiple Airlines

Deal found 10/28

$362

Mon 11/179:50 amSTL - YYZ

2 stops10h 17mMultiple Airlines

Fri 11/217:00 amYYZ - STL

1 stop26h 57mMultiple Airlines

Deal found 10/28

$316

Mon 11/179:50 amSTL - YYZ

2 stops10h 17mMultiple Airlines

Thu 11/205:15 pmYYZ - STL

1 stop7h 42mMultiple Airlines

Deal found 10/28

$358

Tue 11/253:14 pmSTL - YYZ

2 stops31h 41mMultiple Airlines

Tue 12/27:15 amYYZ - STL

1 stop16h 18mMultiple Airlines

Deal found 10/28

$410

Wed 11/2610:24 amSTL - YYZ

1 stop12h 47mMultiple Airlines

Tue 12/27:15 amYYZ - STL

1 stop16h 18mMultiple Airlines

Deal found 10/27

$408

Sun 11/304:13 pmSTL - YYZ

1 stop18h 30mMultiple Airlines

Thu 12/45:15 pmYYZ - STL

1 stop16h 44mMultiple Airlines

Deal found 10/28

$394

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 October 29, 2025.

Thu 2/2612:20 pmSTL - YYZ

1 stop10h 00mMultiple Airlines

Deal found 10/27

$108

Thu 12/45:15 amSTL - YYZ

1 stop9h 48mAmerican Airlines

Deal found 10/28

$110

Thu 12/43:30 pmSTL - YYZ

1 stop7h 41mMultiple Airlines

Deal found 10/29

$130

Mon 12/810:47 amSTL - YYZ

2 stops12h 38mMultiple Airlines

Deal found 10/27

$131

Wed 12/103:30 pmSTL - YYZ

1 stop7h 41mMultiple Airlines

Deal found 10/27

$138

Fri 12/510:42 amSTL - YYZ

2 stops26h 38mMultiple Airlines

Deal found 10/27

$141

Tue 12/93:30 pmSTL - YYZ

1 stop21h 43mMultiple Airlines

Deal found 10/27

$144

Sun 11/166:21 pmSTL - YYZ

2 stops25h 46mMultiple Airlines

Deal found 10/28

$153

Fly from

Fly to

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 12/15

5:15 am-5:44 pm

1 stop11h 29m

Toronto Pearson Intl

Thu 1/8

1:14 pm-9:15 pm

1 stop9h 01m

$276

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/14

6:33 pm-10:57 am

1 stop15h 24m

Toronto Pearson Intl

Sat 2/21

11:38 am-6:03 pm

1 stop7h 25m

$279

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 1/14

5:06 pm-2:20 pm

1 stop20h 14m

Toronto Pearson Intl

Sat 1/17

2:20 pm-9:46 am

2 stops20h 26m

$296

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 11/17

9:50 am-9:07 pm

2 stops10h 17m

Toronto Pearson Intl

Fri 11/21

7:00 am-8:57 am

1 stop26h 57m

$316

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 12/10

5:05 am-4:03 pm

1 stop9h 58m

Toronto Pearson Intl

Wed 12/17

6:00 am-3:29 pm

1 stop10h 29m

$316

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 2/1

5:11 pm-2:20 pm

1 stop20h 09m

Toronto Pearson Intl

Tue 2/10

1:30 pm-4:49 pm

2 stops28h 19m

$325

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 12/4

12:04 pm-12:11 am

2 stops11h 07m

Toronto Pearson Intl

Mon 12/8

7:15 am-10:33 pm

1 stop16h 18m

$325

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 2/19

12:20 pm-11:20 pm

1 stop10h 00m

Toronto Pearson Intl

Mon 2/23

8:20 pm-10:02 am

2 stops38h 42m

$331

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 12/11

2:47 pm-2:40 pm

1 stop22h 53m

Toronto Pearson Intl

Sun 12/14

8:20 pm-9:52 am

2 stops14h 32m

$337

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 2/5

12:20 pm-11:20 pm

1 stop10h 00m

Toronto Pearson Intl

Sun 2/8

8:00 pm-10:02 am

2 stops15h 02m

$363

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 19 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 October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Toronto flight deals on Cheapflights vs. eDreams >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, June is the cheapest month in which you can book a flight from St. Louis to Toronto (average of $179). Flying from St. Louis to Toronto in February is currently the most expensive (average of $364). 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?

When flying from St. Louis to Toronto, 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?

Reviews of airlines servicing Toronto

Read through reviews of airlines operating flights from St. Louis to Toronto, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

8.0

Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Delta

7.9

Good

7,994 reviews

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

8.0

Excellent

Matthew,Oct 2025

GSP - ATL

United Airlines

7.4

Good

9,001 reviews

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

8.0

Excellent

Matthew,Oct 2025

GSP - ATL

American Airlines

7.2

Good

11,032 reviews

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

8.0

Excellent

Matthew,Oct 2025

GSP - ATL

Air Canada

7.1

Good

10,371 reviews

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

8.0

Excellent

Matthew,Oct 2025

GSP - ATL

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.
How long is the flight from St. Louis to Toronto?
For as low as $276, American Airlines can have you in Toronto from St. Louis in 11h 29m. St. Louis and Toronto are separated by a distance of 653 mi.
What are the cheapest airlines flying from St. Louis to Toronto round-trip?
Our cheapest airline available from St. Louis to Toronto is United Airlines. Our recent data shows that you can find tickets from as low as $214 on this airline. Additional options worth looking into are Air Canada and American Airlines, starting at $221 and $391 round-trip. United Airlines is currently priced 52% below the average price you’ll pay for this route.
What are the most reliable airlines from St. Louis to Toronto?
Consider Air Canada (93%), Jazz (93%) or United Airlines (93%) 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 $141. On average you can expect to pay $1,431. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $294.
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, June is the cheapest month in which you can book a flight from St. Louis to Toronto (average of $179). Flying from St. Louis to Toronto in February is currently the most expensive (average of $364). 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
United Airlines	Cheapest$214	Average$529	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$221	Average$530	FlexibilityNo cancel fee	On-time67%
American Airlines	Cheapest$391	Average$612	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.

$108+ 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 2/26. 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 January or April, booked 52 days in advance, depart on a Tuesday or Sunday and return on a Tuesday

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 October 29, 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 October 29, 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 October.

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 October 24, 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 October 29, 2025.

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

Reviews of airlines servicing Toronto

Read through reviews of airlines operating flights from St. Louis to Toronto, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's 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?

How long is the flight from St. Louis to Toronto?

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

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 October 29, 2025.