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Cheap flights from St. Louis to Toronto from C$ 259

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 20/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
4 May — 11 May1
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 29 April 2025.

Round-trip from

C$ 470

One-way from

C$ 259

Popular in

March

Cheapest in

May

Average price

C$ 435

Good one-way deal

C$ 461 or less
20/6-22/6
  • 20/6-22/6
  • 2 total stops
  • 54h 40m total
  • St. Louis to Toronto
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20/6
  • 20/6
  • 1 total stop
  • 8h 32m total
  • St. Louis to Toronto
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Highest demand for flights based on searches. 3% potential increase in price (C$ 27 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 33 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 29 April 2025.

Fri 20/611:28 a.m.STL - YYZ
1 stop25h 37mMultiple Airlines
Sun 22/66:30 a.m.YYZ - STL
1 stop29h 03mMultiple Airlines
Deal found 28/4C$ 470
Tue 27/56:00 a.m.STL - YYZ
1 stop13h 44mDelta
Wed 9/76:15 a.m.YYZ - STL
1 stop15h 42mDelta
Deal found 27/4C$ 597
Mon 26/56:30 a.m.STL - YYZ
1 stop4h 19mAir Canada
Mon 26/53:00 p.m.YYZ - STL
1 stop5h 58mAir Canada
Deal found 28/4C$ 667
Sat 5/79:15 a.m.STL - YYZ
Nonstop1h 58mUnited Airlines
Fri 25/72:10 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 28/4C$ 689
Thu 10/75:15 a.m.STL - YYZ
1 stop8h 44mAmerican Airlines
Sun 20/76:00 a.m.YYZ - STL
1 stop6h 58mAmerican Airlines
Deal found 28/4C$ 744
Wed 11/611:48 a.m.STL - YYZ
2 stops11h 36mWestJet
Sun 15/63:31 p.m.YYZ - STL
1 stop6h 09mWestJet
Deal found 28/4C$ 818

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 29 April 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

Fri 20/6

11:28 a.m.-2:05 p.m.

1 stop25h 37m

Toronto Pearson Intl

Sun 22/6

6:30 a.m.-10:33 a.m.

1 stop29h 03m

C$ 470

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 27/5

6:00 a.m.-8:44 p.m.

1 stop13h 44m

Toronto Pearson Intl

Wed 9/7

6:15 a.m.-8:57 p.m.

1 stop15h 42m

C$ 597

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 26/5

6:30 a.m.-11:49 a.m.

1 stop4h 19m

Toronto Pearson Intl

Mon 26/5

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

1 stop5h 58m

C$ 667

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 5/7

9:15 a.m.-12:13 p.m.

Nonstop1h 58m

Toronto Pearson Intl

Fri 25/7

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

Nonstop2h 06m

C$ 689

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 10/7

5:15 a.m.-2:59 p.m.

1 stop8h 44m

Toronto Pearson Intl

Sun 20/7

6:00 a.m.-11:58 a.m.

1 stop6h 58m

C$ 744

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 11/6

11:48 a.m.-12:24 a.m.

2 stops11h 36m

Toronto Pearson Intl

Sun 15/6

3:31 p.m.-8:40 p.m.

1 stop6h 09m

C$ 818

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 20/6

11:28 a.m.-9:00 p.m.

1 stop8h 32m

C$ 259

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 3/7

9:15 a.m.-12:13 p.m.

Nonstop1h 58m

C$ 335

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 3/7

9:19 a.m.-4:14 p.m.

1 stop5h 55m

C$ 348

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

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 25 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 29 April 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 29 April 2025.
Get a feel of what it's like to fly with Delta, United Airlines and American 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.
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,823 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,240 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 0 outbound flights 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$ 597 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at C$ 667 and C$ 689 round-trip.

  • 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$ 810, our data shows the cheapest flight currently is C$ 309. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 470 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 29 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 302AverageC$ 753FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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