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Cheap flights from St. Louis to Toronto from C$ 283

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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
8 Jul — 15 Jul1
1 adult
1 adult, Economy, 0 bags
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 Thursday or Wednesday 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 8 June 2026.

Tue 14/76:34 p.m.
STL
-
YYZ
2 stops16h 26m
Multiple Airlines
Wed 22/78:35 p.m.
YYZ
-
STL
1 stop22h 40m
Multiple Airlines
Deal found 8/6C$ 608
Mon 13/74:57 p.m.
STL
-
YYZ
2 stops27h 28m
Multiple Airlines
Wed 22/78:35 p.m.
YYZ
-
STL
1 stop22h 40m
Multiple Airlines
Deal found 8/6C$ 625
Tue 14/76:34 p.m.
STL
-
YYZ
2 stops16h 26m
Multiple Airlines
Tue 21/77:00 a.m.
YYZ
-
STL
1 stop12h 05m
Multiple Airlines
Deal found 8/6C$ 629
Tue 21/76:34 p.m.
STL
-
YYZ
2 stops16h 26m
Multiple Airlines
Fri 24/79:50 a.m.
YYZ
-
STL
1 stop15h 09m
Multiple Airlines
Deal found 7/6C$ 635
Mon 13/74:57 p.m.
STL
-
YYZ
2 stops27h 28m
Multiple Airlines
Tue 21/77:00 a.m.
YYZ
-
STL
1 stop12h 05m
Multiple Airlines
Deal found 8/6C$ 646
Sun 12/76:34 p.m.
STL
-
YYZ
2 stops21h 21m
Multiple Airlines
Mon 20/78:35 p.m.
YYZ
-
STL
1 stop22h 30m
Multiple Airlines
Deal found 8/6C$ 648
Tue 28/77:03 p.m.
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
Thu 6/812:55 p.m.
YYZ
-
STL
2 stops45h 02m
Multiple Airlines
Deal found 8/6C$ 654
Wed 22/74:09 p.m.
STL
-
YYZ
1 stop23h 36m
Multiple Airlines
Wed 5/84:45 p.m.
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 4/6C$ 655
Wed 12/84:57 p.m.
STL
-
YYZ
2 stops20h 08m
Multiple Airlines
Mon 17/88:35 p.m.
YYZ
-
STL
1 stop22h 33m
Multiple Airlines
Deal found 4/6C$ 658
Tue 7/77:03 p.m.
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
Tue 14/76:30 a.m.
YYZ
-
STL
2 stops12h 07m
Multiple Airlines
Deal found 6/6C$ 662
Thu 16/76:34 p.m.
STL
-
YYZ
2 stops45h 21m
Multiple Airlines
Wed 22/78:35 p.m.
YYZ
-
STL
1 stop22h 40m
Multiple Airlines
Deal found 8/6C$ 664
Fri 24/74:57 p.m.
STL
-
YYZ
2 stops22h 58m
Multiple Airlines
Tue 28/79:50 a.m.
YYZ
-
STL
1 stop15h 09m
Multiple Airlines
Deal found 7/6C$ 667

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 8 June 2026.

Round-trip from

C$ 608

One-way from

C$ 283

Popular in

November

Cheapest in

December

Average price

C$ 763

Good round-trip deal

C$ 607 or less
14/7-22/7
  • 14/7-22/7
  • 3 total stops
  • 39h 06m total
  • St. Louis to Toronto
Search Deals
6/7
  • 6/7
  • 2 total stops
  • 27h 28m total
  • St. Louis to Toronto
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 18 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

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 8 June 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

Sat 8/8

6:09 p.m.-10:59 p.m.

1 stop3h 50m

Toronto Pearson Intl

Tue 11/8

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

Nonstop2h 07m

C$ 773
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 8/8

2:40 p.m.-5:37 p.m.

Nonstop1h 57m

Toronto Pearson Intl

Tue 11/8

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

Nonstop2h 07m

C$ 792

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 27/6

5:36 p.m.-11:14 p.m.

1 stop4h 38m

Toronto Pearson Intl

Sun 28/6

4:00 p.m.-8:25 p.m.

1 stop5h 25m

C$ 823

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 12/7

10:19 a.m.-3:20 p.m.

1 stop4h 01m

Toronto Pearson Intl

Sun 19/7

6:10 a.m.-9:31 a.m.

1 stop4h 21m

C$ 845

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 15/7

6:30 a.m.-11:19 a.m.

1 stop3h 49m

Toronto Pearson Intl

Sun 19/7

6:10 a.m.-9:31 a.m.

1 stop4h 21m

C$ 845

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 2/10

10:29 a.m.-3:15 p.m.

1 stop3h 46m

Toronto Pearson Intl

Wed 7/10

9:45 a.m.-1:20 p.m.

1 stop4h 35m

C$ 845

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 30/10

10:45 a.m.-5:22 p.m.

1 stop5h 37m

Toronto Pearson Intl

Mon 2/11

3:59 p.m.-8:37 p.m.

1 stop5h 38m

C$ 845

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 21/7

10:19 a.m.-3:20 p.m.

1 stop4h 01m

Toronto Pearson Intl

Tue 28/7

9:45 a.m.-1:05 p.m.

1 stop4h 20m

C$ 845

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 16/7

10:19 a.m.-3:20 p.m.

1 stop4h 01m

Toronto Pearson Intl

Thu 23/7

6:10 a.m.-9:31 a.m.

1 stop4h 21m

C$ 845
Cheapest one-way
Quickest one-way

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 21/7

8:55 a.m.-11:52 a.m.

Nonstop1h 57m

C$ 326

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/6

Showing 1-10 of 20 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

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$ 220). Flying from St. Louis to Toronto in January is currently the most expensive (average of C$ 653). 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 8 June 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.

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 8 June 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.

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 4 outbound flights 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 1h 57m. Air Canada provides one of the quickest options available for as low as C$ 792. 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$ 330 on this airline. Users have found that Air Canada is 57% cheaper than the other options available to this destination.

  • 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?

    While on average a flight from St. Louis to Toronto is generally C$ 607, our data shows the cheapest flight currently is C$ 279. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 655 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$ 220). Flying from St. Louis to Toronto in January is currently the most expensive (average of C$ 653). 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 8 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 330AverageC$ 650FlexibilityNo 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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