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Cheap flights from Toronto to St. Louis from C$ 219

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 15/7. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — STL
17 Jun — 24 Jun1
1 adult

Cheapflights Tip: The best prices from Toronto to Lambert-St Louis are usually found in June or November, booked 65 days in advance, depart on a Thursday or Tuesday and return on a Monday

Cheap 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 June 2025.

Round-trip from

C$ 461

One-way from

C$ 219

Popular in

August

Cheapest in

June

Average price

C$ 533

Good round-trip deal

C$ 468 or less

Good one-way deal

C$ 504 or less
22/7-24/7
  • 22/7-24/7
  • 3 total stops
  • 44h 37m total
  • Toronto to St. Louis
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15/7
  • 15/7
  • 1 total stop
  • 11h 01m total
  • Toronto to St. Louis
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Highest demand for flights based on searches. 5% potential increase in price (C$ 54 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Toronto (YTO) to Lambert-St Louis.
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Price to beat on a one-way flight from Toronto (YTO) to Lambert-St Louis.
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Find flight deals from Toronto to St. Louis

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 June 2025.

Tue 22/76:30 a.m.YYZ - STL
1 stop11h 01mMultiple Airlines
Thu 24/710:47 a.m.STL - YYZ
2 stops33h 36mMultiple Airlines
Deal found 12/6C$ 461
Mon 23/67:25 p.m.YYZ - STL
1 stop5h 34mAmerican Airlines
Thu 26/66:00 a.m.STL - YYZ
1 stop3h 59mAmerican Airlines
Deal found 10/6C$ 463
Thu 26/611:30 a.m.YYZ - STL
Nonstop2h 06mAir Canada
Sun 29/61:30 p.m.STL - YYZ
1 stop15h 55mAir Canada
Deal found 11/6C$ 470
Fri 20/62:27 p.m.YYZ - STL
1 stop7h 26mDelta
Sun 22/67:00 a.m.STL - YYZ
1 stop9h 06mDelta
Deal found 10/6C$ 494
Mon 6/109:00 a.m.YYZ - STL
1 stop26h 49mUnited Airlines
Thu 9/1012:25 p.m.STL - YYZ
1 stop7h 37mUnited Airlines
Deal found 12/6C$ 496
Fri 29/810:12 a.m.YYZ - STL
1 stop4h 08mWestJet
Sun 7/96:00 a.m.STL - YYZ
2 stops11h 03mWestJet
Deal found 10/6C$ 670

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 June 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

Tue 22/7

6:30 a.m.-4:31 p.m.

1 stop11h 01m

Lambert-St Louis

Thu 24/7

10:47 a.m.-9:23 p.m.

2 stops33h 36m

C$ 461

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 23/6

7:25 p.m.-11:59 p.m.

1 stop5h 34m

Lambert-St Louis

Thu 26/6

6:00 a.m.-10:59 a.m.

1 stop3h 59m

C$ 463

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/6

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

Lambert-St Louis

Sun 29/6

1:30 p.m.-6:25 a.m.

1 stop15h 55m

C$ 470

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/6

10:20 a.m.-3:17 p.m.

1 stop5h 57m

Lambert-St Louis

Sun 29/6

6:40 a.m.-11:18 a.m.

1 stop3h 38m

C$ 494

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/6

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

Lambert-St Louis

Sun 29/6

7:30 a.m.-10:25 a.m.

Nonstop1h 55m

C$ 498

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 29/8

10:12 a.m.-1:20 p.m.

1 stop4h 08m

Lambert-St Louis

Sun 7/9

6:00 a.m.-6:03 p.m.

2 stops11h 03m

C$ 670

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 15/7

6:30 a.m.-4:31 p.m.

1 stop11h 01m

C$ 219

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/6

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

C$ 257

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 25/6

3:45 p.m.-11:59 p.m.

1 stop9h 14m

C$ 271

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/6

8:15 a.m.-3:47 p.m.

1 stop8h 32m

C$ 301

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 12 results
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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

How far ahead should I book a flight from Toronto 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 9 June 2025.

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Toronto to St. Louis. 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 Toronto to St. Louis?

Currently, January is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 365). Flying from Toronto to St. Louis in September is currently the most expensive (average of C$ 491). 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 June 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 22% on flights from Toronto to St. Louis by exploring options for tickets in the morning.

Weekly flight availability from Toronto to St. Louis

Explore weekly flight availability from Toronto to St. Louis. 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 12 June 2025.

The most flights from YTO to STL are scheduled on a Wednesday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

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 12 June 2025.
Read reviews from past customers who have flown Delta, United Airlines and American Airlines from Toronto to St. Louis. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,946 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,868 reviews
Delta
8.0
Very good
7,946 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,537 reviews
Delta
8.0
Very good
7,946 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 are 3 flights from Toronto to Lambert-St Louis per day from 3 different airlines.

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

    Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at C$ 463. Additional round-trip tickets that might be worth considering are offered by Air Canada and Delta, with the lowest prices starting at C$ 470 and C$ 494, respectively. American Airlines is currently priced 31% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Toronto to St. Louis one-way?

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as C$ 257. Users have also found prices from C$ 271 and C$ 301 on American Airlines and United Airlines, respectively.

  • 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 Jazz (83%), Air Canada (77%) and United Airlines (50%).

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

    While on average a flight from Toronto to St. Louis is generally C$ 656, our data shows the cheapest flight currently is C$ 331. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 451 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, January is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 365). Flying from Toronto to St. Louis in September is currently the most expensive (average of C$ 491). 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

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Chesterfield
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Top 3 airlines flying from Toronto to St. Louis

Discover the top 3 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 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 468AverageC$ 662FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 474AverageC$ 669FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 552AverageC$ 726FlexibilityNo 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?

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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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