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C$ 252+ Cheap flights to St. Louis

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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Flights to St. Louis in 2025

Find the latest flights to St. Louis in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 11 September 2025.

Round-trip from

C$ 362

One-way from

C$ 230

Popular in

January

Cheapest in

June

Average price

C$ 660

Good round-trip deal

C$ 542 or less

Good one-way deal

C$ 1,023 or less
6/11-10/11
  • 6/11-10/11
  • 2 total stops
  • 54h 05m total
  • Toronto to St. Louis
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4/10
  • 4/10
  • 1 total stop
  • 25h 27m total
  • Toronto to St. Louis
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Highest demand for flights based on searches. 6% potential increase in price (C$ 59 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Toronto to Lambert-St Louis.
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Price to beat on a one-way flight from Toronto to Lambert-St Louis.
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Find flight deals to St. Louis

Cheapest flights to St. Louis
Explore the most affordable flight options available to St. Louis. Find the lowest fares based on data from user searches, with prices last updated on 11 September 2025.

Thu 6/119:45 a.m.YYZ - STL
1 stop29h 12mMultiple Airlines
Mon 10/119:07 p.m.STL - YYZ
1 stop24h 53mMultiple Airlines
Deal found 11/9C$ 362
Thu 6/119:45 a.m.YYZ - STL
1 stop29h 12mMultiple Airlines
Sat 8/114:51 p.m.STL - YYZ
1 stop12h 29mMultiple Airlines
Deal found 11/9C$ 366
Fri 7/119:45 a.m.YYZ - STL
1 stop11h 27mMultiple Airlines
Mon 10/112:42 p.m.STL - YYZ
2 stops21h 58mMultiple Airlines
Deal found 11/9C$ 382
Wed 15/106:30 a.m.YYZ - STL
1 stop28h 32mMultiple Airlines
Mon 20/109:59 p.m.STL - YYZ
2 stops21h 53mMultiple Airlines
Deal found 10/9C$ 388
Sun 26/109:35 a.m.YYZ - STL
2 stops24h 57mMultiple Airlines
Thu 30/1010:57 a.m.STL - YYZ
1 stop26h 43mMultiple Airlines
Deal found 10/9C$ 392
Wed 15/101:15 p.m.YYZ - STL
1 stop11h 39mAmerican Airlines
Tue 21/106:00 a.m.STL - YYZ
1 stop7h 30mAmerican Airlines
Deal found 9/9C$ 412
Tue 7/101:15 p.m.YYZ - STL
1 stop8h 11mAmerican Airlines
Tue 14/106:00 a.m.STL - YYZ
1 stop9h 34mAmerican Airlines
Deal found 9/9C$ 442
Wed 1/109:35 a.m.YYZ - STL
1 stop25h 05mMultiple Airlines
Sun 5/104:00 p.m.STL - YYZ
2 stops27h 55mMultiple Airlines
Deal found 11/9C$ 443
Fri 7/119:45 a.m.YYZ - STL
1 stop11h 27mMultiple Airlines
Sun 9/1111:23 a.m.STL - YYZ
2 stops17h 57mMultiple Airlines
Deal found 11/9C$ 460
Thu 6/117:55 p.m.YYZ - STL
1 stop19h 02mMultiple Airlines
Sun 9/1111:23 a.m.STL - YYZ
2 stops17h 57mMultiple Airlines
Deal found 11/9C$ 470

Cheapflights Fare Finder

 
Locate flights to St. Louis that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 11 September 2025.
Use the filters below to find and compare flights to St. Louis that are best for you.

Fly from

Toronto

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 7/11

9:45 a.m.-8:12 p.m.

1 stop11h 27m

Lambert-St Louis

Mon 10/11

2:42 p.m.-1:40 p.m.

2 stops21h 58m

C$ 382

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 20/10

10:40 a.m.-9:07 a.m.

2 stops23h 27m

Lambert-St Louis

Thu 23/10

10:57 a.m.-8:55 p.m.

1 stop8h 58m

C$ 489

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 7/10

7:00 a.m.-8:46 p.m.

3 stops14h 46m

Lambert-St Louis

Tue 14/10

6:00 a.m.-1:47 p.m.

1 stop6h 47m

C$ 528

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 17/11

10:57 a.m.-9:19 p.m.

1 stop11h 22m

Lambert-St Louis

Sat 22/11

7:58 p.m.-10:52 a.m.

1 stop13h 54m

C$ 532

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 11/10

11:50 a.m.-11:58 p.m.

1 stop13h 08m

Lambert-St Louis

Sat 18/10

6:00 a.m.-4:34 p.m.

1 stop9h 34m

C$ 542

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 8/11

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Lambert-St Louis

Sun 9/11

5:12 p.m.-11:59 p.m.

1 stop5h 47m

C$ 557

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 3/10

2:15 p.m.-3:18 p.m.

Nonstop2h 03m

Lambert-St Louis

Sun 5/10

9:15 a.m.-12:11 p.m.

Nonstop1h 56m

C$ 561

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 15/10

2:15 p.m.-3:18 p.m.

Nonstop2h 03m

Lambert-St Louis

Mon 20/10

9:15 a.m.-12:11 p.m.

Nonstop1h 56m

C$ 561

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 25/10

2:15 p.m.-3:18 p.m.

Nonstop2h 03m

Lambert-St Louis

Sun 2/11

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

Nonstop2h 01m

C$ 561

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 14/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Lambert-St Louis

Thu 16/10

6:00 a.m.-12:10 p.m.

1 stop5h 10m

C$ 568

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 18 results
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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
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 to St. Louis

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

Use this chart to determine the optimal time to book a round-trip flight from Toronto to St. Louis. Price data was last updated on 29 August 2025.

The best time to book flights to St. Louis is 65 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.

How long is the flight to St. Louis?

On average, a flight from Toronto to St. Louis takes 2 hours 3 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, United Airlines and American Airlines.

Air Canada
Air Canada
From C$ 238
United Airlines
United Airlines
From C$ 232
WestJet
WestJet
From C$ 185
Delta
Delta
From C$ 265

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

The cheapest airlines flying from Toronto to St. Louis are American Airlines, Air Canada and Delta.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals 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

Plan your trip to St. Louis by taking into account the average temperature totals 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).

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 11 September 2025.
Read through reviews of airlines serving the United States, such as United Airlines,WestJet, andAir 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.
United Airlines
7.4
Good
8,937 reviews
Check prices

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
WestJet
7.2
Good
3,091 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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 5 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, WestJet 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$ 62, while round-trip flights cost around C$ 140.

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

    A round-trip flight to St. Louis will typically cost around C$ 341, however they can be found for as little as C$ 101.

  • 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 3 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. Hampton Inn St. Louis-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?

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

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