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Cheap flights from St. Louis to Toronto from C$ 171

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
22 abr. — 29 abr.1
1 adult

Cheapflights Tip: 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 Monday and return on a Tuesday

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 17 abril 2025.

Round-trip from

C$ 440

One-way from

C$ 171

Popular in

March

Cheapest in

May

Average price

C$ 435

Good one-way deal

C$ 231 or less
5/6-9/6
  • 5/6-9/6
  • 2 total stops
  • 18h 27m total
  • St. Louis to Toronto
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9/5
  • 9/5
  • 2 total stops
  • 24h 01m total
  • St. Louis to Toronto
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Highest demand for flights based on searches. 3% potential increase in price (C$ 24 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 32 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 one-way flight from Lambert-St Louis to Toronto (YTO).
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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 17 abril 2025.

jue. 5/610:10 a.m.STL - YYZ
1 stop9h 50mMultiple Airlines
lun. 9/64:00 p.m.YYZ - STL
1 stop8h 37mMultiple Airlines
Deal found 17/4C$ 440
jue. 15/57:30 a.m.STL - YYZ
Nonstop1h 55mAir Canada
dom. 18/53:00 p.m.YYZ - STL
1 stop5h 58mAir Canada
Deal found 15/4C$ 593
mar. 3/67:32 a.m.STL - YYZ
1 stop10h 03mAmerican Airlines
mar. 10/611:40 a.m.YYZ - STL
1 stop9h 50mAmerican Airlines
Deal found 17/4C$ 603
lun. 5/55:34 p.m.STL - YYZ
1 stop4h 41mDelta
mar. 20/57:55 a.m.YYZ - STL
1 stop13h 53mDelta
Deal found 17/4C$ 624
mar. 22/76:33 a.m.STL - YYZ
2 stops6h 46mUnited Airlines
sáb. 26/72:10 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 17/4C$ 649
vie. 6/66:00 a.m.STL - YYZ
2 stops23h 52mWestJet
dom. 8/66:30 a.m.YYZ - STL
1 stop5h 02mWestJet
Deal found 16/4C$ 707
mié. 7/53:08 p.m.STL - YYZ
1 stop22h 52mAlaska Airlines
jue. 22/54:45 p.m.YYZ - STL
1 stop32h 19mAlaska Airlines
Deal found 17/4C$ 894

Cheapflights Fare Finder

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 17 abril 2025.
Use the filters below to find and compare flights from St. Louis to Toronto that are best for you.

Fly from

St. Louis

Fly to

Toronto

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 5/6

10:10 a.m.-9:00 p.m.

1 stop9h 50m

Toronto Pearson Intl

lun. 9/6

4:00 p.m.-11:37 p.m.

1 stop8h 37m

C$ 440

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 15/5

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

Nonstop1h 55m

Toronto Pearson Intl

dom. 18/5

3:00 p.m.-7:58 p.m.

1 stop5h 58m

C$ 593

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mar. 3/6

7:32 a.m.-6:35 p.m.

1 stop10h 03m

Toronto Pearson Intl

mar. 10/6

11:40 a.m.-8:30 p.m.

1 stop9h 50m

C$ 603

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

lun. 5/5

5:34 p.m.-11:15 p.m.

1 stop4h 41m

Toronto Pearson Intl

mar. 20/5

7:55 a.m.-8:48 p.m.

1 stop13h 53m

C$ 624

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mar. 22/7

6:33 a.m.-2:19 p.m.

2 stops6h 46m

Toronto Pearson Intl

sáb. 26/7

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

Nonstop2h 06m

C$ 649

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

vie. 6/6

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

2 stops23h 52m

Toronto Pearson Intl

dom. 8/6

6:30 a.m.-10:32 a.m.

1 stop5h 02m

C$ 707

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mié. 7/5

3:08 p.m.-3:00 p.m.

1 stop22h 52m

Toronto Pearson Intl

jue. 22/5

4:45 p.m.-12:04 a.m.

1 stop32h 19m

C$ 894

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

vie. 9/5

9:55 p.m.-10:56 p.m.

2 stops24h 01m

C$ 171

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

dom. 8/6

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

Nonstop1h 55m

C$ 275

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mié. 4/6

12:30 p.m.-10:54 p.m.

1 stop9h 24m

C$ 284

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/4

Showing 1-10 of 12 results
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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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Toronto

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 11 April 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 17 abril 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 67% on airfare.

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 17 abril 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
9,882 reviews
Check prices

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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
9,882 reviews
Alaska Airlines
8.0
Very good
9,882 reviews
Check prices

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,882 reviews
Check prices

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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
8,667 reviews
Alaska Airlines
8.0
Very good
9,882 reviews
Check prices

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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
9,882 reviews
Check prices

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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
2,809 reviews
Alaska Airlines
8.0
Very good
9,882 reviews
Check prices

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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 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 Air Canada. Our recent data shows that you can find tickets from as low as C$ 593 on this airline. Additional options worth looking into are American Airlines and Delta, starting at C$ 603 and C$ 624 round-trip.

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

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as C$ 275. Users have also found prices from C$ 284 and C$ 298 on Delta and United Airlines, respectively.

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

    Consider Air Canada (78%), Jazz (78%) or United Airlines (78%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Toronto.

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

    While on average a flight from St. Louis to Toronto is generally C$ 236, our data shows the cheapest flight currently is C$ 192. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 455 for that flight.

  • 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

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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 17 abril 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 302AverageC$ 753FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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