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$289 Cheap Flights from Toronto (YYZ) to St. Louis (STL)

View $289 flight on Fri, Dec 11, 2026Opens in a new window

Popular airlines from Toronto Pearson Intl. Airport (YYZ) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Toronto to St. Louis (YYZ-STL)

Prices were available within the past 7 days and start at $289 for one-way flights and $508 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, Oct 8 - Sun, Oct 11
YYZ
Toronto
STL
St. Louis
$508 Roundtrip, found 6 days ago
$508
Roundtrip
found 6 days ago
Select Air Canada flight, departing Thu, Oct 8 from Toronto to St. Louis, returning Sun, Oct 11, priced at $508 found 6 days ago
American Airlines
Fri, Dec 11 - Mon, Dec 14
YYZ
Toronto
STL
St. Louis
$515 Roundtrip, found 2 days ago
$515
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Dec 11 from Toronto to St. Louis, returning Mon, Dec 14, priced at $515 found 2 days ago
Delta
Thu, Nov 26 - Sun, Nov 29
YYZ
Toronto
STL
St. Louis
$521 Roundtrip, found 2 days ago
$521
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Nov 26 from Toronto to St. Louis, returning Sun, Nov 29, priced at $521 found 2 days ago
Air Canada
Thu, Oct 1 - Fri, Oct 9
YYZ
Toronto
STL
St. Louis
$522 Roundtrip, found 6 days ago
$522
Roundtrip
found 6 days ago
Select Air Canada flight, departing Thu, Oct 1 from Toronto to St. Louis, returning Fri, Oct 9, priced at $522 found 6 days ago
Air Canada
Sat, Oct 3 - Sat, Oct 10
YYZ
Toronto
STL
St. Louis
$532 Roundtrip, found 3 hours ago
$532
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Sat, Oct 3 from Toronto to St. Louis, returning Sat, Oct 10, priced at $532 found 3 hours ago
Air Canada
Sat, Oct 3 - Sat, Oct 10
YYZ
Toronto
STL
St. Louis
$541 Roundtrip, found 3 hours ago
$541
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Sat, Oct 3 from Toronto to St. Louis, returning Sat, Oct 10, priced at $541 found 3 hours ago
Air Canada
Sat, Oct 3 - Sat, Oct 10
YYZ
Toronto
STL
St. Louis
$542 Roundtrip, found 3 hours ago
$542
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Sat, Oct 3 from Toronto to St. Louis, returning Sat, Oct 10, priced at $542 found 3 hours ago
Air Canada
Fri, Oct 16 - Sun, Oct 18
YYZ
Toronto
STL
St. Louis
$542 Roundtrip, found 1 day ago
$542
Roundtrip
found 1 day ago
Select Air Canada flight, departing Fri, Oct 16 from Toronto to St. Louis, returning Sun, Oct 18, priced at $542 found 1 day ago
United
Sat, Oct 3 - Sat, Oct 10
YYZ
Toronto
STL
St. Louis
$547 Roundtrip, found 3 hours ago
$547
Roundtrip
found 3 hours ago
Select United flight, departing Sat, Oct 3 from Toronto to St. Louis, returning Sat, Oct 10, priced at $547 found 3 hours ago
WestJet
Sat, Oct 3 - Sat, Oct 10
YYZ
Toronto
STL
St. Louis
$696 Roundtrip, found 3 hours ago
$696
Roundtrip
found 3 hours ago
Select WestJet flight, departing Sat, Oct 3 from Toronto to St. Louis, returning Sat, Oct 10, priced at $696 found 3 hours ago

What you need to know for your flight from Pearson Intl. to Lambert-St. Louis Intl.

Toronto (YYZ) to St. Louis (STL) at a glance

Travel from Toronto (YYZ) to St. Louis (STL) with a selection of airlines on this international short-haul journey. Discover affordable flights from Toronto and compare offerings from various carriers to find the itinerary that suits your budget and schedule as you visit St. Louis's iconic attractions and vibrant neighborhoods. Check out the essential details for flights departing from Pearson International Airport (YYZ) to Lambert-St. Louis International Airport (STL) and make your travel plans today.

  • Fastest flight duration: around 2h 15m non-stop
  • Route distance: roughly 700 miles (1,130 km)
  • Flights per week: around 12 departures on average
  • Typical fares (one-way): economy tickets often range from $185–$640, depending on seasonality and how far ahead you book

Flights from Pearson International Airport (YYZ) to Lambert-St. Louis International Airport (STL)

Based on the latest traveler bookings, here are the top airlines favored for flights from Toronto to St. Louis, particularly non-stop and one-stop options. Popular layover spots include O'Hare International Airport (ORD), with an average layover of about 1 hour and 30 minutes, Detroit Metropolitan Wayne County Airport (DTW), also around 1 hour and 30 minutes, and LaGuardia Airport (LGA), which typically has a layover of about 2 hours and 15 minutes. This variety allows you to customize your travel plans by balancing price, overall travel time, and cabin class for the best itinerary.

  • Air Canada: This full-service airline provides both non-stop and one-stop options, with one-way ticket prices generally falling between $185 and $650. It represents around 38% of the departures on this route, typically achieving non-stop travel in about 2 hours and 15 minutes.
  • United: Another full-service option, United offers non-stop and one-stop flights, with one-way fares usually ranging from $205 to $655. It accounts for approximately 31% of departures along this route, with a standard non-stop flight duration of 2 hours and 15 minutes.
  • American Airlines: This full-service carrier provides one-stop service, with one-way fares typically between $185 and $415. It makes up around 15% of the departures, with an in-flight duration of 3 hours and 30 minutes, leading to a total travel time of approximately 5 hours and 15 minutes, including layover.
  • Delta: Offering one-stop service, Delta is another full-service airline where one-way fares generally range from $210 to $565. It comprises about 13% of the departures on this route, with an in-air time of 3 hours and 30 minutes, leading to a total journey time of roughly 5 hours and 15 minutes, factoring in layover.
  • WestJet: This low-cost carrier provides one-stop flights, with one-way prices typically between $255 and $485. It represents approximately 3% of the departures for this route, featuring an in-flight duration of 3 hours and 30 minutes and an estimated total travel time of around 5 hours and 15 minutes, including layover.

Travelers flying from Toronto to St. Louis have the option to upgrade their journey, with United offering first class and Air Canada providing business class service.

Best time to fly from Toronto (YYZ) to St. Louis (STL)

The most popular months for travelers flying from Toronto to St. Louis are April, July, and August, when peak temperatures in St. Louis reach up to 78.6°F in July. If you prefer quieter travel, consider December, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 37.8°F. For better deals, June usually offers the lowest average one-way fare around $265. Flight availability peaks in July, with approximately 16 flights per week, making it easier to find convenient departure times. January has the fewest flights, with approximately 9 flights per week.

  • Cheapest time to fly: June usually offers good deals with average one-way fare around $265, roughly 17% cheaper than the yearly average.
  • Another budget-friendly time to fly: May typically offers an average one-way fare of around $290.
  • Most flight options: July has the highest number of flights from Toronto to St. Louis, with approximately 16 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January31.6°F (-0.2°C)Average9$310
February34.9°F (1.6°C)Average11$298
March46.4°F (8.0°C)Average10$319
April56.1°F (13.4°C)Moderately High11$334
May66.6°F (19.2°C)Average13$290
June76.1°F (24.5°C)Average12$265
July78.6°F (25.9°C)Moderately High16$336
August77.0°F (25.0°C)Moderately High14$308
September70.9°F (21.6°C)Average12$357
October58.6°F (14.8°C)Moderately Low14$334
November46.2°F (7.9°C)Moderately Low10$409
December37.8°F (3.2°C)Moderately Low12$306

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Toronto (YYZ) to St. Louis (STL)

  • Toronto to St. Louis (YTZ-STL): Billy Bishop Toronto City Airport (YTZ) is located approximately 11 miles from Pearson International Airport (YYZ), offering travelers convenient access to their journey.
  • Hamilton to St. Louis (YHM-STL): John C. Munro Hamilton International Airport (YHM) lies about 39 miles from Pearson International Airport (YYZ), making it a viable option for those flying to St. Louis.
  • Kitchener to St. Louis (YKF-STL): Region of Waterloo International Airport (YKF) is situated roughly 42 miles from Pearson International Airport (YYZ), providing another route for travelers heading to STL.

How to find the best prices for flights from Toronto (YYZ) to St. Louis (STL)

Getting some of the best deals on flights from Toronto to St. Louis is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking 2-8 weeks in advance, which coincides with when most travelers make their reservations. Morning departures (5 am-12 pm) often offer lower prices, while afternoon flights (12 pm-6 pm) are the most popular. Additionally, flying on Tuesday tends to be cheaper, though Sunday remains the busiest travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Lambert-St. Louis International Airport from Pearson International Airport

St. Louis welcomes travelers from Toronto with a range of transport options based on price, convenience, and proximity. For departures, Pearson International Airport is roughly a 25-minute drive (covering about 19 miles) from central Toronto. Here's how to reach St. Louis efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in St. Louis, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Lambert-St. Louis International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Lambert-St. Louis International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Lambert-St. Louis International Airport, Lambert Main Terminal Station, a metro station, is conveniently located just 0.1 miles away on foot, providing easy access to public transport.

Frequently asked questions

How much does a flight from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from $289 and cheap return flights from $508 Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) with Expedia. One-way flights usually range from $224 to $810, and return flights typically cost between $420 and $1391. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
January is the cheapest month to fly from Toronto to St. Louis, with average return fares around $403. This is about 16% lower than the average price throughout the year, as demand typically decreases after the holiday season. Other budget-friendly months to consider are May and June.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Air Canada offers around 13 weekly direct flights from YYZ to STL.
What is the cheapest airline that flies from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Delta is one of the cheapest airlines offering connecting flights from Toronto, ON (YYZ) to St. Louis, MO (STL), with round-trip tickets starting from around $452. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best airline to fly with from Toronto, ON (YYZ) to St. Louis, MO (STL) will differ from traveler to traveler. If you like to fly early, Air Canada offers early morning flights. If price is the most important factor, Air Canada typically offers the lowest fares. Delta offers the most daily flights from YYZ to STL, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best time to fly from Toronto, ON (YYZ) to St. Louis, MO (STL) is in January or June. You can expect to pay around $403 for a return flight during these months, making them both affordable and convenient. January offers a chance to escape the winter chill, while June brings pleasant summer weather, perfect for exploring.*Prices based on flights available on Expedia in the last year.
How many flights per day from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You can find approximately 2 nonstop flights per day from Pearson Intl. (YYZ) to Lambert-St. Louis Intl. (STL). For more options, look at flights that include layovers.
What is the earliest flight from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Toronto, ON (YYZ) to St. Louis, MO (STL) usually departs at around 12:30 AM local time, operated by Air Canada and United. This seasonal service is active in March, and an early start can help you maximize your time in St. Louis. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Toronto, ON (YYZ) to St. Louis, MO (STL) are in the early afternoon, from noon to 3pm. About 31% of passengers prefer this time window. Many major carriers, including Air Canada, Delta Airlines, and United Airlines, offer flights during this window. This timing works well because it allows you to travel after lunch and arrive in St. Louis with time to settle in for the evening.
How long does it take to fly from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A nonstop flight from YYZ to STL typically takes around 2 hours 30 minutes, covering approximately 654 miles. Connecting flights on this route usually add 2 hours 50 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You can fly business class between YYZ and STL. Airlines that offer business class service on this route include:

  • United Airlines
  • Air Canada
  • American Airlines

First class cabins are available on:

  • Delta Air Lines
  • United Airlines
  • Air Canada

How much is a business class flight from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A direct, return business class ticket from Toronto, ON (YYZ) to St. Louis, MO (STL) typically costs between $974 - $1,322. A non-stop, one-way business class flight is usually around $589 - $860. You may also be able to find a cheaper business class journey between Toronto and St. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis from Pearson Intl. (YYZ)?
From Pearson Intl. (YYZ), you can fly into Lambert-St. Louis Intl. (STL) to reach St. Louis. Some flights may connect through major hubs like Winnipeg James Armstrong Richardson Intl. (YWG), LaGuardia (LGA), Liberty Intl. (EWR) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) St Louis Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Toronto, ON (YYZ-Pearson Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Pearson Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Air Canada, American Airlines, Delta, United, WestJet
Roundtrip price
$508
Distance
654 mi
Average flight time
1 hour 5 mins

Book with confidence

Toronto to St. Louis Flights

The cheapest times to fly from Toronto to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Toronto to St. Louis are during the month of October. You can find some of the cheapest flights from Toronto to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Toronto to St. Louis

Sunday is one of the best days to book for cheap flights from Toronto to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Toronto to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Toronto to St. Louis in 2026. You can also book with separate airlines for your outbound and return journeys, from $289 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Toronto to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Toronto to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Toronto to St. Louis Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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