HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Toronto

$202+ 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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
Jul 9 — Jul 161
Thu 7/9
Thu 7/16
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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 December or March, booked 53 days in advance, depart on a Sunday or Friday and return on a Sunday

Cheap 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 9, 2026.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:03 pm
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
Sun 7/124:45 pm
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 6/9$429
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Tue 7/146:34 pm
STL
-
YYZ
2 stops16h 26m
Multiple Airlines
Wed 7/228:35 pm
YYZ
-
STL
1 stop22h 40m
Multiple Airlines
Deal found 6/8$436
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Mon 7/134:57 pm
STL
-
YYZ
2 stops27h 28m
Multiple Airlines
Wed 7/228:35 pm
YYZ
-
STL
1 stop22h 40m
Multiple Airlines
Deal found 6/8$448
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Tue 7/146:34 pm
STL
-
YYZ
2 stops16h 26m
Multiple Airlines
Tue 7/217:00 am
YYZ
-
STL
1 stop12h 05m
Multiple Airlines
Deal found 6/8$451
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 7/216:34 pm
STL
-
YYZ
2 stops16h 26m
Multiple Airlines
Fri 7/249:50 am
YYZ
-
STL
1 stop15h 09m
Multiple Airlines
Deal found 6/7$455
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Mon 7/134:57 pm
STL
-
YYZ
2 stops27h 28m
Multiple Airlines
Tue 7/217:00 am
YYZ
-
STL
1 stop12h 05m
Multiple Airlines
Deal found 6/8$463
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Sun 7/126:34 pm
STL
-
YYZ
2 stops21h 21m
Multiple Airlines
Mon 7/208:35 pm
YYZ
-
STL
1 stop22h 30m
Multiple Airlines
Deal found 6/8$465
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Tue 7/287:03 pm
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
Thu 8/612:55 pm
YYZ
-
STL
2 stops45h 02m
Multiple Airlines
Deal found 6/8$469
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Wed 7/224:09 pm
STL
-
YYZ
1 stop23h 36m
Multiple Airlines
Wed 8/54:45 pm
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 6/4$470
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/314:57 pm
STL
-
YYZ
2 stops18h 03m
Multiple Airlines
Tue 8/49:50 am
YYZ
-
STL
1 stop15h 09m
Multiple Airlines
Deal found 6/9$472
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/49:08 am
STL
-
YYZ
1 stop7h 26m
American Airlines
Tue 8/251:15 pm
YYZ
-
STL
1 stop11h 59m
American Airlines
Deal found 6/9$474
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 7/77:03 pm
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
Tue 7/146:30 am
YYZ
-
STL
2 stops12h 07m
Multiple Airlines
Deal found 6/6$475

Find 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 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$429
(Kiwi.com)

One-way from

$202
(Kiwi.com)

Popular in

November

Cheapest in

December

Average price

$547

Good round-trip deal

$360 or less

Good one-way deal

$404 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, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
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

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 9, 2026.
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

Cheapest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 8/13

7:10 pm-6:39 am

1 stop10h 29m

Toronto Pearson Intl

Sun 8/16

8:35 pm-6:15 pm

1 stop22h 40m

$538
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 6/25

2:15 pm-5:06 pm

Nonstop1h 51m

Toronto Pearson Intl

Sun 6/28

11:15 am-12:21 pm

Nonstop2h 06m

$599

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 7/15

6:30 am-11:19 am

1 stop3h 49m

Toronto Pearson Intl

Sun 7/19

6:10 am-9:31 am

1 stop4h 21m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 10/2

10:29 am-3:15 pm

1 stop3h 46m

Toronto Pearson Intl

Wed 10/7

9:45 am-1:20 pm

1 stop4h 35m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 7/12

10:19 am-3:20 pm

1 stop4h 01m

Toronto Pearson Intl

Sun 7/19

6:10 am-9:31 am

1 stop4h 21m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 7/24

10:19 am-5:24 pm

1 stop6h 05m

Toronto Pearson Intl

Sun 7/26

6:10 am-9:31 am

1 stop4h 21m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 7/21

10:19 am-3:20 pm

1 stop4h 01m

Toronto Pearson Intl

Tue 7/28

9:45 am-1:05 pm

1 stop4h 20m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 7/16

10:19 am-3:20 pm

1 stop4h 01m

Toronto Pearson Intl

Thu 7/23

6:10 am-9:31 am

1 stop4h 21m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 7/2

1:13 pm-8:44 pm

1 stop6h 31m

Toronto Pearson Intl

Mon 7/6

12:55 pm-2:02 pm

Nonstop2h 07m

$608
Cheapest one-way

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 8/12

4:57 pm-2:05 pm

2 stops20h 08m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/6

Showing 1-10 of 20 resultsSorted by cheapest first
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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 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

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 $158). Flying from St. Louis to Toronto in January is currently the most expensive (average of $468). 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 9, 2026.

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.

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 9, 2026.

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

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

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

Booking 89 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.

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 9, 2026.
Read through reviews of airlines operating flights from St. Louis to Toronto, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,394 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.9
Good
8,394 reviews
Delta
7.9
Good
8,394 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,796 reviews
Delta
7.9
Good
8,394 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,640 reviews
Delta
7.9
Good
8,394 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Air Canada
7.1
Good
11,149 reviews
Delta
7.9
Good
8,394 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 4 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.

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

    For as low as $599, United Airlines can have you in Toronto from St. Louis in 1h 51m. St. Louis and Toronto are separated by a distance of 653 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Our cheapest airline available from St. Louis to Toronto is Air Canada. Our recent data shows that you can find tickets from as low as $236 on this airline. Additional options worth looking into are United Airlines and American Airlines, starting at $253 and $270 round-trip. Air Canada is currently priced 58% below the average price you’ll pay for this route.

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

    Consider Jazz (81%), Air Canada (66%) or United Airlines (53%) 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 $225. On average you can expect to pay $560. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $448.

  • 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 $158). Flying from St. Louis to Toronto in January is currently the most expensive (average of $468). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$218Average$556FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$236Average$586FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$270Average$545FlexibilityNo cancel feeOn-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.