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Cheap flights from Toronto to St. Louis from C$ 252

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — STL
30 Mar — 6 Apr1
1 adult

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

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 25 March 2025.

Round-trip from

C$ 540

One-way from

C$ 252

Popular in

January

Cheapest in

May

Average price

C$ 755

Good round-trip deal

C$ 592 or less
Air Canada
  • Air Canada
  • 7/5-10/5
  • Nonstop
  • 4h 06m total
  • Toronto to St. Louis
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8/4
  • 8/4
  • 2 total stops
  • 17h 36m total
  • Toronto to St. Louis
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Highest demand for flights based on searches. 4% potential increase in price (C$ 48 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip 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 25 March 2025.

Fri 5/92:10 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Mon 8/94:05 p.m.STL - YYZ
Nonstop1h 55mAir Canada
Deal found 24/3C$ 563
Thu 15/57:45 a.m.YYZ - STL
1 stop9h 50mDelta
Sun 18/56:00 a.m.STL - YYZ
1 stop4h 40mDelta
Deal found 24/3C$ 572
Wed 23/41:15 p.m.YYZ - STL
1 stop11h 18mAmerican Airlines
Wed 30/45:45 a.m.STL - YYZ
1 stop10h 50mAmerican Airlines
Deal found 24/3C$ 579
Fri 4/47:10 a.m.YYZ - STL
1 stop17h 36mMultiple Airlines
Tue 6/55:47 p.m.STL - YYZ
1 stop29h 00mMultiple Airlines
Deal found 24/3C$ 587
Mon 21/47:45 a.m.YYZ - STL
1 stop5h 00mWestJet
Mon 28/45:32 p.m.STL - YYZ
1 stop5h 24mWestJet
Deal found 24/3C$ 597
Wed 23/46:15 a.m.YYZ - STL
2 stops7h 05mUnited Airlines
Wed 30/410:40 a.m.STL - YYZ
1 stop4h 06mUnited Airlines
Deal found 24/3C$ 616
Wed 23/46:30 a.m.YYZ - STL
2 stops18h 29mAlaska Airlines
Wed 30/46:15 a.m.STL - YYZ
2 stops31h 45mAlaska Airlines
Deal found 24/3C$ 1,029

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 25 March 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

2:10 p.m.-3:16 p.m.

Nonstop2h 06m

Lambert-St Louis

Mon 8/9

4:05 p.m.-7:00 p.m.

Nonstop1h 55m

C$ 563

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 15/5

7:45 a.m.-4:35 p.m.

1 stop9h 50m

Lambert-St Louis

Sun 18/5

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

1 stop4h 40m

C$ 572

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 23/4

1:15 p.m.-11:33 p.m.

1 stop11h 18m

Lambert-St Louis

Wed 30/4

5:45 a.m.-5:35 p.m.

1 stop10h 50m

C$ 579

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 4/4

7:10 a.m.-11:46 p.m.

1 stop17h 36m

Lambert-St Louis

Tue 6/5

5:47 p.m.-11:47 p.m.

1 stop29h 00m

C$ 587

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 21/4

7:45 a.m.-11:45 a.m.

1 stop5h 00m

Lambert-St Louis

Mon 28/4

5:32 p.m.-11:56 p.m.

1 stop5h 24m

C$ 597

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 23/4

6:15 a.m.-12:20 p.m.

2 stops7h 05m

Lambert-St Louis

Wed 30/4

10:40 a.m.-3:46 p.m.

1 stop4h 06m

C$ 616

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 23/4

6:30 a.m.-11:59 p.m.

2 stops18h 29m

Lambert-St Louis

Wed 30/4

6:15 a.m.-3:00 p.m.

2 stops31h 45m

C$ 1,029

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 7/5

4:00 p.m.-12:06 a.m.

1 stop9h 06m

C$ 258

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 6/5

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

Nonstop2h 06m

C$ 305

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 10/5

6:05 p.m.-9:31 p.m.

1 stop4h 26m

C$ 325

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/3

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 21 March 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 25 March 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.

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 25 March 2025.

The most flights from YTO to STL are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 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 25 March 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
9,782 reviews
Check prices

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,782 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
WestJet
7.2
Good
2,785 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 2 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 Air Canada is currently your cheapest option to St. Louis, with prices starting at C$ 540. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at C$ 572 and C$ 579, respectively. Air Canada is currently priced 23% 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$ 325 and C$ 340 on Delta 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 (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$ 681, our data shows the cheapest flight currently is C$ 502. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 444 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?

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St. Peters
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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 534AverageC$ 719FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 600AverageC$ 709FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 650AverageC$ 781FlexibilityNo 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?

Cheapflights makes it easy to find Toronto to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Toronto to St. Louis?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Toronto to St. Louis for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Toronto to St. Louis with no change fees?

Yes, we can. To see specific flights from Toronto to St. Louis with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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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