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C$ 241+ Cheap flights to St. Louis

— STL
10 Oct — 17 Oct1
1 adult
1 adult, Economy, 0 bags

Flights to St. Louis in 2026

Enter your travel dates to find the best prices.

Cheapest flights to St. Louis

Wed 7/101:15 p.m. -
1 stop8h 42m
Wed 14/107:29 a.m. -
1 stop9h 15m
Deal found 9/9C$ 443
Thu 29/109:35 a.m. -
1 stop14h 41m
Thu 5/114:26 p.m. -
1 stop20h 14m
Deal found 8/9C$ 452
Thu 29/101:15 p.m. -
1 stop8h 42m
Sat 31/105:00 a.m. -
1 stop8h 33m
Deal found 9/9C$ 459
Wed 7/107:29 a.m. -
1 stop10h 24m
Fri 9/107:29 a.m. -
1 stop9h 15m
Deal found 9/9C$ 481
Mon 5/101:15 p.m. -
1 stop8h 42m
Fri 9/105:00 a.m. -
1 stop8h 33m
Deal found 9/9C$ 496
Sat 17/104:50 p.m. -
1 stop7h 23m
Sat 24/104:30 p.m. -
1 stop20h 40m
Deal found 5/9C$ 520
Thu 22/101:15 p.m. -
1 stop8h 42m
Mon 26/107:03 a.m. -
1 stop8h 44m
Deal found 8/9C$ 523
Mon 19/107:45 a.m. -
1 stop16h 28m
Fri 30/106:44 p.m. -
2 stops17h 56m
Deal found 6/9C$ 536
Tue 6/1012:55 p.m. -
2 stops25h 15m
Sat 10/104:30 p.m. -
1 stop20h 15m
Deal found 10/9C$ 574
Tue 6/109:30 a.m. -
2 stops28h 40m
Thu 15/104:30 p.m. -
1 stop23h 10m
Deal found 8/9C$ 585
Mon 12/107:45 a.m. -
1 stop16h 28m
Thu 15/104:30 p.m. -
1 stop23h 10m
Deal found 8/9C$ 587

Find flight deals to St. Louis

Round-trip from

C$ 443

One-way from

C$ 241

Popular in

March

Cheapest in

October

Average price

C$ 922

Good round-trip deal

C$ 639 or less
American Airlines
  • American Airlines
  • 7/10-14/10
  • 2 total stops
  • 17h 57m total
  • Toronto to St. Louis
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27/10-31/12
  • 27/10-31/12
  • 2 total stops
  • 33h 05m total
  • Toronto to St. Louis
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Highest demand for flights based on searches. 18% potential increase in price (C$ 159 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease (C$ 51 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Toronto to Lambert-St Louis.
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights to St. Louis that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest round-trip

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Sun 4/10

9:30 a.m.-1:10 p.m.

2 stops28h 40m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 255

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Sun 8/11

1:00 p.m.-1:21 p.m.

2 stops25h 21m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 294

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Mon 12/10

7:34 p.m.-8:53 a.m.

1 stop14h 19m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 318

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Mon 7/12

2:25 p.m.-7:09 a.m.

2 stops41h 44m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 343

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Sun 27/9

6:30 a.m.-1:10 p.m.

2 stops31h 40m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 361

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Wed 7/10

11:09 a.m.-8:32 p.m.

1 stop10h 23m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 364

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Wed 7/10

8:05 a.m.-3:21 p.m.

1 stop8h 16m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 370

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Sun 8/11

4:30 p.m.-3:43 p.m.

1 stop24h 13m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 371

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Tue 6/10

6:35 p.m.-1:10 p.m.

3 stops19h 35m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 387
Quickest round-trip

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Sun 27/9

8:50 a.m.-12:15 p.m.

1 stop4h 25m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 401

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight to St. Louis

How long is the flight to St. Louis?

On average, a flight from Toronto to St. Louis takes 2 hours 5 minutes. Flights to St. Louis from other popular cities in Canada will vary in length. Below are a few examples of popular routes and their flight times.

Weekly flight availability to St. Louis

The most flights from Toronto to St. Louis 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).

What are the most popular airlines that fly to St. Louis?

The most popular airlines flying from Toronto to St. Louis are Air Canada and United Airlines.

Air Canada
Air Canada
From C$ 186
United Airlines
United Airlines
From C$ 337
WestJet
WestJet
From C$ 420
Delta
Delta
From C$ 208

What are the cheapest airlines that fly to St. Louis?

The cheapest airlines flying from Toronto to St. Louis are Air Canada and United Airlines.

Rainfall in St. Louis by month

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Temperature in St. Louis by month

If weather is an important factor for your trip to St. Louis, 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

When is the best time to book a flight to St. Louis?

The best time to book flights to St. Louis is 46 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing St. Louis

Read through reviews of airlines serving the United States, such as Air Canada. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
11,608 reviews
Check prices

Entertainment

6.8

Comfort

7.1

Food

6.3

Overall

7.1

Boarding

7.3

Crew

7.8

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had
Air Canada
7.1
Good
11,608 reviews
Air Canada
7.1
Good
11,608 reviews
Check prices

Entertainment

6.8

Comfort

7.1

Food

6.3

Overall

7.1

Boarding

7.3

Crew

7.8

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had

FAQs about flying to St. Louis

St. Louis climate

St Louis has moderate, seasonal weather, but storms can occur at any time of the year. July and August are the hottest and most humid months of the year, and January and February are cold, usually with snow. Winter temperatures range from below 0 to 13 degrees (C), while summers have daily temperatures of between 14 to 32 degrees. 

Getting around St. Louis

You won’t need a car in downtown St Louis. You can get almost anywhere downtown with the St Louis MetroLink, which hits most of the area’s tourist attractions. There are even some shuttle buses connecting the MetroLink stations to the attractions. MetroBus, which is part of the same system, can get you farther out into the city. Rent a car if you’d like. St Louis is easy to navigate and you can take the highways out to top tourist neighbourhoods like University City, Central West End and Clayton. Most hotels and tourist attractions have a taxi stand if you need a cab. You can also call for a taxi ahead of time. 

What is good to know if travelling to St. Louis?

  • Independence Day is celebrated with style in St. Louis. Grab a blanket and a couple chairs and head down to the riverfront for Fourth of July festivities. Grab a spot underneath the Arch and enjoy the spectacle. From people watching, to concerts and outdoor vendors and markets, there is much to do to celebrate America’s birthday. And of course, an amazing fireworks display happens on the riverfront.
  • St. Louis’ Soulard Market Place is home to the best outdoor markets in the city, and also one of the best Mardi Gras party’s in the Midwest.
  • The Butterfly Garden in St. Louis’ suburb, Chesterfield, is a must-see for travellers of any age. Located in Faust Park about 30 minutes west of St. Louis City, the Butterfly Garden is a delight for everyone.
  • You don’t have to be a baseball fan to appreciate Busch Stadium. Take a tour of the Stadium or take in a game.
  • Beer lovers know St. Louis as the home of Anheuser-Busch. Brewed right in the city center, the Anheuser-Busch Brewery offers daily tours, and of course, beer tastings. 

  • When is the best time to fly to St. Louis?

    Peak Season Summers in St. Louis are hot and humid, but this is also the best time to visit if you want to take part in the riverfront activities. St. Louis is a big baseball town, and the St. Louis Cardinals draw thousands of fans a year. If you’re planning to visit St. Louis during the spring and summer seasons, book flights early and make accommodations ahead of time. The city gets full fast. Off Season St. Louis is prone to long, cold winters.  The city all but shuts down during the wintertime and while many tourist attractions are open to the public, none of the outside activities are much fun in the snow. However, if you’re heading to St. Louis for some football time or to explore the excellent museums, you’re likely to find a cheap flight to St. Louis in the winter.

  • What airport do you fly into for flights to St. Louis?

    If you book a flight to St. Louis, you will be flying into 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. On average, Lambert-St Louis has 4 flights from Toronto per day from 2 airlines.

  • Can I find cheaper flights to St. Louis if I am willing to have layovers?

    Yes, flights with layovers are often cheaper than direct flights. Keep an eye out for flight deals to St. Louis on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to St. Louis?

    Based on reviews from Cheapflights users, Air Canada is rated the highest out of the airlines that fly to St. Louis.

  • What is the cheapest airport to fly to in St. Louis?

    Lambert-St Louis is currently the cheapest airport to fly to in St. Louis. One-way flights to Lambert-St Louis typically cost C$ 259, while round-trip flights cost around C$ 229.

  • How much is a round-trip flight to St. Louis?

    A round-trip flight to St. Louis will typically cost around C$ 474, however they can be found for as little as C$ 229.

  • Where does the fastest flight to St. Louis depart from?

    For those looking to save time traveling to St. Louis, Toronto offers the quickest one-way flight (2 hours 5 minutes).

  • Does Lambert-St Louis have rental cars?

    Yes. Those touching down at Lambert-St Louis can take advantage of the rental car services offered upon their arrival.

  • Are there hotels close to Lambert-St Louis?

    Yes. Lambert-St Louis has hotels nearby for those requiring accommodations. St Ann Townhome Less Than 1 Mi to International Airport! is the closest property to Lambert-St Louis (0.0 km away from Lambert-St Louis).

See more FAQs

Travelling to a place near St. Louis?

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Chesterfield

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