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Cheap flights from Toronto to St. Louis from C$ 258

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 14/5. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — STL
20 Apr — 27 Apr1
1 adult

Cheapflights Tip: The best prices from Toronto to Lambert-St Louis are usually found in November or October, booked 47 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

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 15 April 2025.

Round-trip from

C$ 523

One-way from

C$ 258

Popular in

January

Cheapest in

November

Average price

C$ 716

Good round-trip deal

C$ 533 or less

Good one-way deal

C$ 623 or less
Air Canada
  • Air Canada
  • 5/9-8/9
  • 2 total stops
  • 11h 25m total
  • Toronto to St. Louis
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14/5
  • 14/5
  • 3 total stops
  • 18h 06m total
  • Toronto to St. Louis
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Highest demand for flights based on searches. 3% potential increase in price (C$ 33 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).
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Average for round-trip flights in April 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 15 April 2025.

Fri 5/93:00 p.m.YYZ - STL
1 stop5h 57mAir Canada
Sun 7/96:35 a.m.STL - YYZ
1 stop4h 14mAir Canada
Deal found 14/4C$ 523
Thu 1/56:30 p.m.YYZ - STL
Nonstop2h 13mMultiple Airlines
Sun 4/51:30 p.m.STL - YYZ
1 stop7h 09mMultiple Airlines
Deal found 14/4C$ 526
Tue 10/611:00 a.m.YYZ - STL
1 stop5h 30mUnited Airlines
Tue 24/66:30 a.m.STL - YYZ
2 stops6h 49mUnited Airlines
Deal found 13/4C$ 570
Thu 15/511:45 a.m.YYZ - STL
1 stop10h 41mAmerican Airlines
Tue 20/510:25 a.m.STL - YYZ
1 stop5h 19mAmerican Airlines
Deal found 14/4C$ 594
Mon 12/510:20 a.m.YYZ - STL
1 stop11h 28mWestJet
Mon 19/55:40 p.m.STL - YYZ
1 stop15h 40mWestJet
Deal found 14/4C$ 613
Mon 5/54:45 p.m.YYZ - STL
2 stops31h 19mAlaska Airlines
Thu 8/56:52 a.m.STL - YYZ
2 stops31h 08mAlaska Airlines
Deal found 14/4C$ 1,025

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 15 April 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

Fri 5/9

3:00 p.m.-7:57 p.m.

1 stop5h 57m

Lambert-St Louis

Mon 8/9

5:30 p.m.-11:58 p.m.

1 stop5h 28m

C$ 523

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 1/5

6:30 p.m.-7:43 p.m.

Nonstop2h 13m

Lambert-St Louis

Sun 4/5

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

Nonstop1h 55m

C$ 526

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 29/4

6:30 a.m.-5:15 p.m.

1 stop11h 45m

Lambert-St Louis

Thu 1/5

9:55 p.m.-5:20 p.m.

1 stop18h 25m

C$ 533

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 15/5

11:45 a.m.-9:26 p.m.

1 stop10h 41m

Lambert-St Louis

Tue 20/5

10:25 a.m.-4:44 p.m.

1 stop5h 19m

C$ 594

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 12/5

10:20 a.m.-8:48 p.m.

1 stop11h 28m

Lambert-St Louis

Mon 19/5

5:40 p.m.-10:20 a.m.

1 stop15h 40m

C$ 613

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 5/5

4:45 p.m.-11:04 p.m.

2 stops31h 19m

Lambert-St Louis

Thu 8/5

6:52 a.m.-3:00 p.m.

2 stops31h 08m

C$ 1,025

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 14/5

7:00 a.m.-12:06 a.m.

3 stops18h 06m

C$ 258

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 14/5

6:30 p.m.-7:43 p.m.

Nonstop2h 13m

C$ 282

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 15/5

1:15 p.m.-11:51 p.m.

1 stop11h 36m

C$ 302

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 28/5

12:45 p.m.-9:15 p.m.

2 stops9h 30m

C$ 304

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/4

Showing 1-10 of 11 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 11 April 2025.

Booking 46 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 15 April 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 17% on flights from Toronto to St. Louis by exploring options for tickets in the morning.

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 15 April 2025.
Read reviews from past customers who have flown Alaska Airlines, 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.
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,871 reviews
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,656 reviews
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
WestJet
7.2
Good
2,805 reviews
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Air Canada
7.0
Good
9,127 reviews
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 3 different airlines.

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

    Flying on Air Canada is currently your cheapest option to St. Louis, with prices starting at C$ 523. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at C$ 526 and C$ 594, respectively. Air Canada is currently priced 24% 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$ 282. Users have also found prices from C$ 302 and C$ 304 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 Air Canada (75%), Jazz (75%) and United Airlines (75%).

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

    While on average a flight from Toronto to St. Louis is generally C$ 599, our data shows the cheapest flight currently is C$ 332. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 368 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

Travelling to a place near Toronto?

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

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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 15 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 513AverageC$ 693FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 566AverageC$ 683FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 612AverageC$ 756FlexibilityNo 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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