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Cheap flights from St. Louis to Toronto from C$ 99

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 27/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
26 Feb — 5 Mar1
1 adult

The best prices from Lambert-St Louis to Toronto are usually found in May or August, booked 52 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap flight deals from St. Louis to Toronto

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Toronto (YTO). 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 21 February 2025.

Round-trip from

C$ 305

One-way from

C$ 99

Popular in

February

Cheapest in

May

Average price

C$ 928
1/4-3/4
  • 1/4-3/4
  • 2 total stops
  • 39h 55m total
  • St. Louis to Toronto
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27/3
  • 27/3
  • 1 total stop
  • 28h 08m total
  • St. Louis to Toronto
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Highest demand for flights based on searches. 15% potential increase in price (C$ 160 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease (C$ 44 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find flight deals from St. Louis to Toronto

Cheapest flights from St. Louis to Toronto
Explore the most affordable flight options available from St. Louis to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Tue 1/46:47 p.m.STL - YYZ
1 stop28h 08mMultiple Airlines
Thu 3/47:05 a.m.YYZ - STL
1 stop11h 47mMultiple Airlines
Deal found 19/2C$ 305
Mon 31/39:30 a.m.STL - YYZ
1 stop10h 01mDelta
Mon 7/46:14 a.m.YYZ - STL
1 stop9h 32mDelta
Deal found 20/2C$ 616
Mon 24/35:55 a.m.STL - YYZ
1 stop10h 35mAmerican Airlines
Fri 28/311:30 a.m.YYZ - STL
1 stop7h 29mAmerican Airlines
Deal found 20/2C$ 651
Thu 20/35:33 p.m.STL - YYZ
1 stop5h 26mAir Canada
Thu 27/39:00 a.m.YYZ - STL
1 stop4h 12mAir Canada
Deal found 20/2C$ 663
Wed 23/49:39 a.m.STL - YYZ
1 stop8h 03mUnited Airlines
Sat 26/48:00 a.m.YYZ - STL
2 stops13h 04mUnited Airlines
Deal found 19/2C$ 689
Fri 23/55:40 p.m.STL - YYZ
1 stop5h 17mWestJet
Sun 25/56:00 a.m.YYZ - STL
1 stop4h 31mWestJet
Deal found 18/2C$ 788
Wed 19/36:15 a.m.STL - YYZ
2 stops31h 40mAlaska Airlines
Wed 26/34:20 p.m.YYZ - STL
2 stops17h 28mAlaska Airlines
Deal found 19/2C$ 1,101

Find flights from St. Louis to Toronto within your budget

Customize your flight search to find flights from St. Louis to Toronto 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 21 February 2025.

Fly from

St. Louis

Fly to

Toronto

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 1/4

6:47 p.m.-11:55 p.m.

1 stop28h 08m

Toronto Pearson Intl

Thu 3/4

7:05 a.m.-5:52 p.m.

1 stop11h 47m

C$ 305

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 31/3

9:30 a.m.-8:31 p.m.

1 stop10h 01m

Toronto Pearson Intl

Mon 7/4

6:14 a.m.-2:46 p.m.

1 stop9h 32m

C$ 616

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 24/3

5:55 a.m.-5:30 p.m.

1 stop10h 35m

Toronto Pearson Intl

Fri 28/3

11:30 a.m.-5:59 p.m.

1 stop7h 29m

C$ 651

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 20/3

5:33 p.m.-11:59 p.m.

1 stop5h 26m

Toronto Pearson Intl

Thu 27/3

9:00 a.m.-12:12 p.m.

1 stop4h 12m

C$ 663

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 23/4

9:39 a.m.-6:42 p.m.

1 stop8h 03m

Toronto Pearson Intl

Sat 26/4

8:00 a.m.-8:04 p.m.

2 stops13h 04m

C$ 689

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 23/5

5:40 p.m.-11:57 p.m.

1 stop5h 17m

Toronto Pearson Intl

Sun 25/5

6:00 a.m.-9:31 a.m.

1 stop4h 31m

C$ 788

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 19/3

6:15 a.m.-2:55 p.m.

2 stops31h 40m

Toronto Pearson Intl

Wed 26/3

4:20 p.m.-8:48 a.m.

2 stops17h 28m

C$ 1,101

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 27/3

6:47 p.m.-11:55 p.m.

1 stop28h 08m

C$ 99

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 22/3

5:33 p.m.-11:59 p.m.

1 stop5h 26m

C$ 281

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 5/4

6:30 a.m.-7:48 p.m.

2 stops12h 18m

C$ 291

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/2

Best time to book a flight from St. Louis to Toronto

Have a flexible travel schedule? Discover the best time to fly to Toronto from 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.

Travel insights for flights from St. Louis to Toronto

Get recent, data-driven insights about flights from St. Louis to Toronto including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from St. Louis to Toronto?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Toronto. Price data was last updated on 14 February 2025.

Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Toronto. 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 St. Louis to Toronto?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Toronto (average of C$ 167). Flying from St. Louis to Toronto in July is currently the most expensive (average of C$ 258). 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 STL to YTO?

Find hourly flight availability from St. Louis to Toronto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 February 2025.

One of the essential ways to save on airfare from St. Louis to Toronto is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 61% on airfare.

Weekly flight availability from St. Louis to Toronto

Explore weekly flight availability from St. Louis to Toronto. 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 21 February 2025.

The most flights from STL to YTO are scheduled on a Wednesday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Toronto by month

Plan your trip to Toronto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Toronto ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Toronto when rainfall is around 51.0 mm.

Temperature in Toronto by month

Plan your trip to Toronto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Toronto, 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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing Toronto

Get insights into the airlines that provide service to Toronto. 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 Toronto. Reviews last updated 21 February 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta and United Airlines from St. Louis to Toronto by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

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
9,692 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

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
8,220 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

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
8,766 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

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
9,692 reviews
Check prices

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

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
2,801 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

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 St. Louis to Toronto. 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 from for flights from St. Louis to Toronto?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Toronto. On average, Lambert-St Louis has 1 outbound flight to Toronto per day from 1 airline. Lambert-St Louis is conveniently located just 20.4 km from St. Louis’s city centre.

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

    Our cheapest airline available from St. Louis to Toronto is Delta. Our recent data shows that you can find tickets from as low as C$ 616 on this airline. Additional options worth looking into are American Airlines and Air Canada, starting at C$ 651 and C$ 663 round-trip.

  • What are the most reliable airlines from St. Louis to Toronto?

    Consider Air Canada (73%), Jazz (73%) or United Airlines (73%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Toronto.

  • Can I find deals for flights from St. Louis to Toronto that include hotel bookings?

    Yes. In addition to deals on St. Louis to Toronto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Toronto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Toronto.

  • Can I find deals for business class flights from St. Louis to Toronto?

    Yes. Cheapflights offers flight deals from St. Louis to Toronto 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 St. Louis to Toronto?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Toronto (average of C$ 167). Flying from St. Louis to Toronto in July is currently the most expensive (average of C$ 258). 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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from St. Louis to Toronto

Discover the top airline that operate flights from St. Louis to Toronto. 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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 366AverageC$ 793FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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How does Cheapflights help users find flights from St. Louis to Toronto?

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

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Yes! Cheapflights helps users easily find flights from St. Louis to Toronto with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to Toronto become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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