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Cheap flights from St. Louis to Toronto from C$ 195

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
29 May — 5 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Lambert-St Louis to Toronto are usually found in June or December, booked 46 days in advance, depart on a Thursday or Tuesday and return on a Saturday

Cheap flight deals from St. Louis to Toronto

Enter your travel dates to find the best prices.

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 29 April 2026.

Thu 28/56:33 p.m.
STL
-
YYZ
2 stops42h 32m
Multiple Airlines
Thu 4/69:50 a.m.
YYZ
-
STL
1 stop15h 07m
Multiple Airlines
Deal found 28/4C$ 458
Wed 27/55:27 p.m.
STL
-
YYZ
2 stops26h 33m
Multiple Airlines
Wed 3/67:45 a.m.
YYZ
-
STL
1 stop17h 12m
Multiple Airlines
Deal found 27/4C$ 490
Wed 27/56:00 a.m.
STL
-
YYZ
1 stop10h 44m
American Airlines
Wed 3/611:39 a.m.
YYZ
-
STL
1 stop9h 51m
American Airlines
Deal found 28/4C$ 501
Tue 2/64:19 p.m.
STL
-
YYZ
2 stops28h 36m
Multiple Airlines
Sat 6/67:45 a.m.
YYZ
-
STL
1 stop17h 12m
Multiple Airlines
Deal found 27/4C$ 509
Tue 9/67:03 a.m.
STL
-
YYZ
1 stop9h 41m
American Airlines
Wed 24/61:15 p.m.
YYZ
-
STL
1 stop12h 01m
American Airlines
Deal found 28/4C$ 514
Tue 23/61:45 p.m.
STL
-
YYZ
1 stop8h 44m
American Airlines
Tue 30/67:25 a.m.
YYZ
-
STL
1 stop10h 08m
American Airlines
Deal found 27/4C$ 529
Wed 27/56:00 a.m.
STL
-
YYZ
1 stop7h 30m
American Airlines
Thu 28/51:15 p.m.
YYZ
-
STL
1 stop8h 15m
American Airlines
Deal found 26/4C$ 538
Wed 10/64:17 p.m.
STL
-
YYZ
1 stop21h 13m
Multiple Airlines
Wed 17/64:45 p.m.
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 26/4C$ 544
Tue 2/66:33 p.m.
STL
-
YYZ
2 stops21h 22m
Multiple Airlines
Mon 8/67:45 a.m.
YYZ
-
STL
1 stop17h 12m
Multiple Airlines
Deal found 27/4C$ 560
Wed 10/65:13 p.m.
STL
-
YYZ
2 stops26h 42m
Multiple Airlines
Sat 13/64:10 p.m.
YYZ
-
STL
1 stop5h 29m
Multiple Airlines
Deal found 28/4C$ 589

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 29 April 2026.

Round-trip from

C$ 458

One-way from

C$ 195

Popular in

November

Cheapest in

June

Average price

C$ 826

Good round-trip deal

C$ 284 or less

Good one-way deal

C$ 326 or less
28/5-4/6
  • 28/5-4/6
  • 3 total stops
  • 57h 39m total
  • St. Louis to Toronto
Search Deals
9/6
  • 9/6
  • 1 total stop
  • 26h 48m total
  • St. Louis to Toronto
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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).
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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 629,999 searches. Data last updated 29 April 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

Mon 25/5

5:10 a.m.-3:14 p.m.

1 stop9h 04m

Toronto Pearson Intl

Mon 25/5

5:15 p.m.-10:52 p.m.

1 stop6h 37m

C$ 688

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 27/5

1:05 p.m.-7:58 p.m.

1 stop5h 53m

Toronto Pearson Intl

Wed 3/6

11:00 a.m.-12:06 p.m.

Nonstop2h 06m

C$ 701
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 6/6

2:15 p.m.-5:06 p.m.

Nonstop1h 51m

Toronto Pearson Intl

Tue 9/6

11:00 a.m.-12:06 p.m.

Nonstop2h 06m

C$ 703

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 17/5

7:45 a.m.-3:46 p.m.

1 stop7h 01m

Toronto Pearson Intl

Fri 22/5

11:00 a.m.-2:23 p.m.

1 stop4h 23m

C$ 723

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 13/5

8:21 a.m.-3:46 p.m.

1 stop6h 25m

Toronto Pearson Intl

Fri 15/5

7:00 p.m.-11:57 p.m.

1 stop5h 57m

C$ 723

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 12/6

5:41 p.m.-11:59 p.m.

1 stop5h 18m

Toronto Pearson Intl

Fri 19/6

8:50 a.m.-12:11 p.m.

1 stop4h 21m

C$ 723

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 6/6

5:41 p.m.-11:59 p.m.

1 stop5h 18m

Toronto Pearson Intl

Tue 9/6

7:00 a.m.-12:11 p.m.

1 stop6h 11m

C$ 723

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 12/6

5:41 p.m.-11:59 p.m.

1 stop5h 18m

Toronto Pearson Intl

Sun 14/6

2:45 p.m.-9:16 p.m.

1 stop7h 31m

C$ 723

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 1/8

12:10 p.m.-7:55 p.m.

1 stop6h 45m

Toronto Pearson Intl

Wed 5/8

7:00 p.m.-8:07 p.m.

Nonstop2h 07m

C$ 729

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 3/7

12:10 p.m.-7:01 p.m.

1 stop5h 51m

Toronto Pearson Intl

Mon 6/7

12:55 p.m.-2:02 p.m.

Nonstop2h 07m

C$ 744

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 23 resultsSorted by cheapest first
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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?

Booking 88 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 C$ 216). Flying from St. Louis to Toronto in January is currently the most expensive (average of C$ 639). 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 29 April 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Toronto as you normally would.

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

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?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Toronto. On average, Lambert-St Louis has 1 outbound flight to Toronto per day from 1 airline. Lambert-St Louis is conveniently located just 20.4 km from St. Louis’s city centre.

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

    A quick flight from St. Louis to Toronto can take about 5h 53m. United Airlines provides one of the quickest options available for as low as C$ 701. The distance between St. Louis and Toronto is about 1051 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly 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 C$ 323 on this airline. Users have found that Air Canada is 55% cheaper than the other options available to this destination.

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

    Consider Air Canada (83%), Jazz (83%) or United Airlines (79%) 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?

    While on average a flight from St. Louis to Toronto is generally C$ 594, our data shows the cheapest flight currently is C$ 280. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 458 for that flight.

  • 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 C$ 216). Flying from St. Louis to Toronto in January is currently the most expensive (average of C$ 639). 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

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Top airline flying from St. Louis to Toronto

Discover the top airline 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 629,999 searches. Data last updated 29 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 323AverageC$ 637FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Toronto?

Deals for St. Louis to Toronto flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Toronto?

Cheapflights simply makes it quick and affordable to book flights from St. Louis to Toronto by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from St. Louis to Toronto with no change fees?

Yes! Cheapflights helps users easily find flights from St. Louis to Toronto with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to Toronto become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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