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Cheap flights from Toronto to St. Louis from C$ 238

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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — STL
4 May — 11 May1
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 29 April 2025.

Round-trip from

C$ 499

One-way from

C$ 241

Popular in

January

Cheapest in

November

Average price

C$ 715

Good round-trip deal

C$ 541 or less

Good one-way deal

C$ 623 or less
10/5-12/5
  • 10/5-12/5
  • 2 total stops
  • 53h 02m total
  • Toronto to St. Louis
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25/5
  • 25/5
  • 1 total stop
  • 8h 52m total
  • Toronto to St. Louis
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Highest demand for flights based on searches. 4% potential increase in price (C$ 39 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% 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 29 April 2025.

Sat 10/56:30 a.m.YYZ - STL
1 stop27h 45mMultiple Airlines
Mon 12/59:55 p.m.STL - YYZ
1 stop25h 17mMultiple Airlines
Deal found 27/4C$ 499
Mon 23/611:30 a.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Wed 25/67:30 a.m.STL - YYZ
Nonstop1h 55mUnited Airlines
Deal found 28/4C$ 561
Fri 30/59:49 a.m.YYZ - STL
1 stop4h 30mDelta
Sun 1/66:00 a.m.STL - YYZ
1 stop6h 40mDelta
Deal found 28/4C$ 568
Fri 5/96:24 p.m.YYZ - STL
1 stop6h 25mAmerican Airlines
Sun 7/95:29 a.m.STL - YYZ
1 stop8h 26mAmerican Airlines
Deal found 28/4C$ 581
Thu 22/511:30 a.m.YYZ - STL
Nonstop2h 06mAir Canada
Wed 28/55:27 p.m.STL - YYZ
1 stop5h 31mAir Canada
Deal found 28/4C$ 603
Mon 23/68:00 p.m.YYZ - STL
2 stops14h 43mWestJet
Thu 26/610:48 a.m.STL - YYZ
1 stop5h 18mWestJet
Deal found 28/4C$ 685
Thu 15/55:29 p.m.YYZ - STL
1 stop5h 59mWestJet Encore
Mon 19/56:00 p.m.STL - YYZ
1 stop19h 33mWestJet Encore
Deal found 28/4C$ 804
Wed 28/54:45 p.m.YYZ - STL
2 stops26h 36mAlaska Airlines
Wed 4/66:00 a.m.STL - YYZ
2 stops32h 00mAlaska Airlines
Deal found 28/4C$ 1,074

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 29 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

Sat 24/5

4:00 p.m.-11:44 p.m.

1 stop8h 44m

Lambert-St Louis

Tue 27/5

5:45 p.m.-1:59 p.m.

1 stop19h 14m

C$ 496

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 22/5

12:05 p.m.-7:58 p.m.

2 stops8h 53m

Lambert-St Louis

Sun 25/5

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

Nonstop1h 55m

C$ 536

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 25/5

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

1 stop11h 28m

Lambert-St Louis

Sun 1/6

6:00 a.m.-11:40 a.m.

1 stop4h 40m

C$ 567

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 5/9

6:24 p.m.-11:49 p.m.

1 stop6h 25m

Lambert-St Louis

Sun 7/9

5:29 a.m.-2:55 p.m.

1 stop8h 26m

C$ 581

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 25/5

12:05 p.m.-9:25 p.m.

2 stops10h 20m

Lambert-St Louis

Sun 1/6

8:10 a.m.-11:07 p.m.

1 stop13h 57m

C$ 613

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 10/7

6:30 p.m.-9:41 a.m.

2 stops16h 11m

Lambert-St Louis

Sun 13/7

6:40 a.m.-11:16 a.m.

1 stop3h 36m

C$ 643

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 25/5

4:45 p.m.-7:29 p.m.

2 stops27h 44m

Lambert-St Louis

Sun 1/6

5:00 a.m.-3:00 p.m.

2 stops33h 00m

C$ 1,175

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 25/5

4:00 p.m.-11:52 p.m.

1 stop8h 52m

C$ 238

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 26/5

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

Nonstop2h 06m

C$ 305

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 8/9

7:59 a.m.-2:53 p.m.

1 stop7h 54m

C$ 323

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/4

Showing 1-10 of 12 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

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 25 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 29 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 29 April 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and United 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
9,961 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
WestJet
7.2
Good
2,823 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 0 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 United Airlines is currently your cheapest option to St. Louis, with prices starting at C$ 561. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at C$ 568 and C$ 581, respectively. United Airlines is currently priced 18% 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$ 305. Users have also found prices from C$ 344 and C$ 373 on United Airlines and WestJet, 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 (79%), Jazz (79%) and United Airlines (79%).

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

    While on average a flight from Toronto to St. Louis is generally C$ 442, our data shows the cheapest flight currently is C$ 294. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 470 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 29 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 515AverageC$ 685FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 547AverageC$ 680FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 611AverageC$ 756FlexibilityNo cancel feeOn-time60%
Search WestJet flights

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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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