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Cheap flights from Toronto to St. Louis from C$ 203

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — STL
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Toronto to St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from Toronto to St. Louis
Explore the most affordable flight options available from Toronto to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 December 2025.

Wed 31/127:40 a.m.YYZ - STL
1 stop28h 16mMultiple Airlines
Wed 7/15:11 p.m.STL - YYZ
2 stops26h 00mMultiple Airlines
Deal found 11/12C$ 476
Fri 26/1210:56 a.m.YYZ - STL
1 stop11h 49mAmerican Airlines
Fri 2/15:30 a.m.STL - YYZ
1 stop10h 59mAmerican Airlines
Deal found 10/12C$ 550
Wed 31/122:15 p.m.YYZ - STL
1 stop6h 03mAir Canada
Wed 7/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 11/12C$ 619
Sat 20/129:00 a.m.YYZ - STL
1 stop6h 26mUnited Airlines
Sat 10/19:57 a.m.STL - YYZ
1 stop13h 02mUnited Airlines
Deal found 10/12C$ 707
Wed 24/125:30 p.m.YYZ - STL
1 stop6h 13mUnited Airlines
Mon 29/126:35 p.m.STL - YYZ
1 stop4h 24mUnited Airlines
Deal found 10/12C$ 765
Sun 28/126:50 a.m.YYZ - STL
1 stop6h 37mAir Canada
Thu 1/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 9/12C$ 782
Sun 28/126:00 a.m.YYZ - STL
1 stop8h 14mAmerican Airlines
Thu 1/15:00 a.m.STL - YYZ
1 stop5h 09mAmerican Airlines
Deal found 9/12C$ 794
Tue 23/126:50 a.m.YYZ - STL
1 stop12h 04mUnited Airlines
Fri 9/18:05 a.m.STL - YYZ
1 stop6h 57mUnited Airlines
Deal found 11/12C$ 832

Find flight deals from Toronto to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Toronto (YTO) to St. Louis (STL). 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 12 December 2025.

Round-trip from

C$ 334

One-way from

C$ 203

Popular in

September

Cheapest in

June

Average price

C$ 714

Good round-trip deal

C$ 529 or less
15/1-18/1
  • 15/1-18/1
  • 3 total stops
  • 42h 24m total
  • Toronto to St. Louis
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4/2
  • 4/2
  • 1 total stop
  • 17h 18m total
  • Toronto to St. Louis
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Price to beat on a round-trip flight from Toronto (YTO) to Lambert-St Louis.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Toronto to St. Louis 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 12 December 2025.
Use the filters below to find and compare flights from Toronto to St. Louis that are best for you.

Fly from

Toronto

Fly to

St. Louis

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 5/3

7:10 a.m.-10:33 p.m.

1 stop16h 23m

Lambert-St Louis

Sun 8/3

10:44 p.m.-6:20 a.m.

1 stop30h 36m

C$ 459

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 10/1

7:15 a.m.-10:33 p.m.

2 stops16h 18m

Lambert-St Louis

Mon 12/1

1:07 p.m.-6:47 a.m.

1 stop16h 40m

C$ 469

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 24/2

6:00 a.m.-1:54 p.m.

1 stop8h 54m

Lambert-St Louis

Sat 28/2

10:04 a.m.-4:02 p.m.

1 stop4h 58m

C$ 480

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 10/1

7:55 p.m.-11:39 a.m.

1 stop16h 44m

Lambert-St Louis

Sat 17/1

5:11 p.m.-2:05 p.m.

1 stop19h 54m

C$ 506

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 12/1

6:00 a.m.-10:20 a.m.

1 stop5h 20m

Lambert-St Louis

Wed 14/1

6:44 p.m.-10:53 a.m.

1 stop15h 09m

C$ 508

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/3

2:00 p.m.-3:29 p.m.

Nonstop2h 29m

Lambert-St Louis

Tue 31/3

4:05 p.m.-7:02 p.m.

Nonstop1h 57m

C$ 516

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 8/1

2:00 p.m.-3:29 p.m.

Nonstop2h 29m

Lambert-St Louis

Mon 12/1

4:05 p.m.-7:06 p.m.

Nonstop2h 01m

C$ 538

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 24/2

2:00 p.m.-3:29 p.m.

Nonstop2h 29m

Lambert-St Louis

Sat 28/2

4:05 p.m.-7:06 p.m.

Nonstop2h 01m

C$ 538

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 4/2

7:15 a.m.-11:33 p.m.

1 stop17h 18m

C$ 203

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 26/1

2:15 p.m.-6:51 a.m.

2 stops41h 36m

C$ 223

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 17 results
1
2

Best time to book a flight from Toronto to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Toronto 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 Toronto to St. Louis

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

Currently, December is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 343). Flying from Toronto to St. Louis in April is currently the most expensive (average of C$ 514). 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 YTO to STL?

Find hourly flight availability from Toronto to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 33% on flights from Toronto to St. Louis by exploring options for tickets in the afternoon.

What’s the top layover airport for flights from Toronto to St. Louis?

Share of one-stop round-trip flights from Toronto to St. Louis chosen by Cheapflights users in the past 12 months, using the same layover each way.

Chicago (ORD) – chosen by Cheapflights users on 56% of one-stop itineraries from Toronto to St. Louis on Cheapflights.

What’s the cheapest layover airport for flights from Toronto to St. Louis?

Average round-trip fare for 1-stop flights from Toronto to St. Louis, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Minneapolis (MSP) is the most affordable 1-stop option, with an average round-trip price of C$ 649.

What’s the fastest layover option from Toronto to St. Louis?

Shortest average travel time for 1-stop one-way flights from Toronto to St. Louis, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Detroit (DTW) have the shortest average one-way travel time for 1-stop routes: 3h 47m.

Which airport typically offers the quickest layover for flights from Toronto to St. Louis?

Average layover duration for 1-stop one-way flights from Toronto to St. Louis, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 0h 56m.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated 12 December 2025.
Check out reviews from past customers who have flown with United Airlines and Air Canada from Toronto to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,095 reviews
Check prices

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
United Airlines
7.4
Good
9,095 reviews
United Airlines
7.4
Good
9,095 reviews
Check prices

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
Air Canada
7.1
Good
10,516 reviews
United Airlines
7.4
Good
9,095 reviews
Check prices

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

Related info for your journey

Find useful and relevant information for your journey from Toronto to St. Louis. 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 into for flights to St. Louis from Toronto?

    If you book a flight to St. Louis from Toronto, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 20.4 km from the centre of St. Louis. There is 1 flight from Toronto to Lambert-St Louis per day from 5 different airlines.

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

    For as low as C$ 480, American Airlines can have you in St. Louis from Toronto in 8h 54m. The distance from Toronto to St. Louis is about 1051 km.

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

    Flying on United Airlines is currently your cheapest option to St. Louis, with prices starting at C$ 337. Additional round-trip tickets that might be worth considering are offered by American Airlines and Air Canada, with the lowest prices starting at C$ 372 and C$ 459, respectively. United Airlines is currently priced 48% below the average price you’ll pay for this route.

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

    The top 3 most reliable airlines when flying from Toronto to St. Louis are United Airlines (84%), Air Canada (81%) and Jazz (81%).

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

    While on average a flight from Toronto to St. Louis is generally C$ 576, our data shows the cheapest flight currently is C$ 476. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 454 for that flight.

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

    Yes. In addition to deals on Toronto to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Toronto to St. Louis.

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

    Yes. Cheapflights offers flight deals from Toronto to St. Louis 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 Toronto to St. Louis?

    Currently, December is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 343). Flying from Toronto to St. Louis in April is currently the most expensive (average of C$ 514). 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

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Chesterfield
St. Peters

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Top 5 airlines flying from Toronto to St. Louis

Discover the top 5 airlines that operate flights from Toronto to St. Louis. 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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 372AverageC$ 684FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 413AverageC$ 631FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 466AverageC$ 619FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 474AverageC$ 645FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 556AverageC$ 879FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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

Cheapflights makes it easy to find Toronto to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Toronto to St. Louis for you. Better yet — we are completely free to use.

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

Yes, we can. To see specific flights from Toronto to St. Louis with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Not ready to book yet? You can track prices for flights from Toronto to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.

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