YYZ - STL

$174 Find Cheap Flights from Toronto to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Toronto to St. Louis departing on 10/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Toronto to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Toronto to St. Louis, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Flights Deals
Expert advice
Booking Insights
Flights Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Toronto to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Toronto to St. Louis

Sat, Nov 8 - Sat, Nov 15
American Airlines Logo
4:44 pm - 11:56 pmYYZ-STL
8h 12m1 stop
American Airlines Logo
6:00 am - 4:04 pmSTL-YYZ
9h 04m1 stop
$321American Airlines
Find Deal
Fri, Sep 12 - Sun, Sep 14
Air Canada Logo
2:15 pm - 3:18 pmYYZ-STL
2h 03mnonstop
Air Canada Logo
4:05 pm - 7:00 pmSTL-YYZ
1h 55mnonstop
$352Air Canada
Find Deal
Fri, Sep 5 - Mon, Sep 8
American Airlines Logo
3:11 pm - 11:30 amYYZ-STL
21h 19m1 stop
American Airlines Logo
7:59 pm - 12:32 pmSTL-YYZ
15h 33m1 stop
$354American Airlines
Find Deal
Fri, Sep 12 - Sun, Sep 14
Air Canada Logo
2:15 pm - 3:18 pmYYZ-STL
2h 03mnonstop
Air Canada Logo
1:30 pm - 9:39 pmSTL-YYZ
7h 09m1 stop
$357Air Canada
Find Deal
Tue, Sep 9 - Thu, Sep 11
American Airlines Logo
1:15 pm - 8:32 pmYYZ-STL
8h 17m1 stop
American Airlines Logo
6:05 am - 2:31 pmSTL-YYZ
7h 26m1 stop
$362American Airlines
Find Deal
Wed, Aug 27 - Wed, Sep 3
American Airlines Logo
11:39 am - 6:23 pmYYZ-STL
7h 44m1 stop
American Airlines Logo
6:00 am - 2:44 pmSTL-YYZ
7h 44m1 stop
$368American Airlines
Find Deal
Mon, Sep 8 - Thu, Sep 11
Delta Logo
6:04 am - 4:49 pmYYZ-STL
11h 45m1 stop
Delta Logo
6:05 am - 4:08 pmSTL-YYZ
9h 03m1 stop
$407Delta
Find Deal
Tue, Aug 26 - Tue, Sep 2
United Airlines Logo
12:45 pm - 9:32 pmYYZ-STL
9h 47m2 stops
United Airlines Logo
7:04 pm - 9:58 amSTL-YYZ
13h 54m1 stop
$458United Airlines
Find Deal
Thu, Sep 11 - Tue, Sep 16
United Airlines Logo
1:00 pm - 6:23 pmYYZ-STL
6h 23m1 stop
United Airlines Logo
6:35 am - 5:19 pmSTL-YYZ
9h 44m2 stops
$459United Airlines
Find Deal
Mon, Aug 18 - Thu, Aug 21
WestJet Logo
6:07 pm - 11:14 pmYYZ-STL
6h 07m1 stop
WestJet Logo
6:00 am - 6:04 pmSTL-YYZ
11h 04m2 stops
$473WestJet
Find Deal
Expert advice

Expert advice for your flight from Toronto to St. Louis

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
United Airlines

United's Economy Plus offers up to six inches more legroom than standard economy seats.


Purchase Priority Boarding to ensure overhead bin space and avoid gate-checking your carry-on.

Air Canada

Air Canada's Business Class offers spacious recliners with plenty of legroom in a 2-2 configuration.


Preferred Economy seats offer up to four extra inches of legroom for an additional fee.

Read more about Air Canadaby Stefanie Waldek
Airports
YYZ

Toronto Pearson offers preclearance for U.S.-bound flights, allowing you to skip customs upon arrival in the U.S.

Read more about YYZby Stefanie Waldek
STL

Use MetroLink for easy access from STL to downtown St. Louis, avoiding rush hour traffic.

Read more about STLby Yulia Denisyuk
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines, Air Canada and YYZ

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia Denisyuk

Yulia Denisyuk

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Read more
Booking Insights

KAYAK's insights & trends for Toronto to St. Louis flights

Get data-powered insights and trends into flights from Toronto to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Toronto to St. Louis?

The average price of all round-trip flights from Toronto Pearson Intl Airport to St. Louis clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to St. Louis on a Saturday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Toronto to St. Louis. For your return ticket, we recommend flying on a Thursday and avoiding Fridays for the best deals.

What is the cheapest month to fly from Toronto Pearson Intl Airport to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Toronto Pearson Intl Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Toronto Pearson Intl Airport to St. Louis is June, where tickets cost $398 (return) on average. On the other hand, the most expensive months are December and September, where the average cost of round-trip tickets is $554 and $545 respectively.

Can I save money by flying with a layover from Toronto Pearson Intl Airport to St. Louis?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $392, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Toronto Pearson Intl Airport to St. Louis?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Toronto Pearson Intl Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Toronto Pearson Intl Airport to St. Louis, you should book around 4 weeks before departure, which saves you about 50% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$174
Best time to beat the crowds but there is an average 11% increase in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from Toronto to St. Louis

When to book flights from Toronto to St. Louis

Are your dates flexible? Find out the best times to travel from Toronto to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Toronto to St. Louis flights

  • What is the cheapest flight from Toronto Pearson Intl Airport to St. Louis?

    In the last 3 days, the lowest price for a flight from Toronto Pearson Intl Airport to St. Louis was $174 for a one-way ticket and $321 for a round-trip.

  • Do I need a passport to fly between Toronto and St. Louis?

    A passport is required to fly from Toronto to St. Louis.

  • Which airlines offer Wi-Fi service onboard planes from Toronto to St. Louis?

    Air Canada, and United Airlines offer inflight Wi-Fi service on the Toronto to St. Louis flight route.

  • Which aircraft models fly most regularly from Toronto to St. Louis?

    The Canadair (Bombardier) Regional Jet 900 is the aircraft model that flies most regularly on the Toronto to St. Louis flight route.

  • Which airline alliances offer flights from Toronto to St. Louis?

    Star Alliance is the only airline alliance operating flights between Toronto and St. Louis.

  • On which days can I fly direct from Toronto to St. Louis?

    There are nonstop flights from Toronto to St. Louis on a daily basis.

  • How does KAYAK find such low prices on flights from Toronto to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Toronto to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Toronto to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Toronto is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Toronto to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Toronto with another airline. Booking your flights between Toronto and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Toronto to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Toronto up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Toronto Pearson Intl Airport to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $345 or less one-way and $576 or less round-trip.

Prefer to fly direct from Toronto to St. Louis?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Toronto Pearson Intl to Lambert-St Louis.
Find which airlines fly direct from Toronto Pearson Intl Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

Toronto Pearson Intl to Lambert-St Louis

Monday

Air Canada, United Airlines

Air Canada, United Airlines

Tuesday

Air Canada, United Airlines

Air Canada, United Airlines

Wednesday

Air Canada, United Airlines

Air Canada, United Airlines

Thursday

Air Canada, United Airlines

Air Canada, United Airlines

Friday

Air Canada, United Airlines

Air Canada, United Airlines

Saturday

Air Canada, United Airlines

Air Canada, United Airlines

Sunday

Air Canada, United Airlines

Air Canada, United Airlines

See more direct flights

Direct returns

Lambert-St Louis to Toronto Pearson Intl

Monday

Air Canada, United Airlines

Air Canada, United Airlines

Tuesday

Air Canada, United Airlines

Air Canada, United Airlines

Wednesday

Air Canada, United Airlines

Air Canada, United Airlines

Thursday

Air Canada, United Airlines

Air Canada, United Airlines

Friday

Air Canada, United Airlines

Air Canada, United Airlines

Saturday

Air Canada, United Airlines

Air Canada, United Airlines

Sunday

Air Canada, United Airlines

Air Canada, United Airlines

See more direct flights

Reviews of the top airline flying from Toronto to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Toronto to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Toronto to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
Air CanadaOverall score based on 9837 reviews
7.8Crew
6.8Entertainment
7.3Boarding
7.1Comfort
6.3Food
Airline reviews

Flight got delayed for no reason. And Air Canada was doing 3 boardings via the same gate. It was chaotic!

2.0 MediocreAnonymous, Jul 2025YYZ - LGA
Read more Air Canada reviews

Flight got delayed for no reason. And Air Canada was doing 3 boardings via the same gate. It was chaotic!

Wonderful airline. All staff were pleasant and helpful. What is sad is that it wasn’t grand gestures just everyday pleasantness and friendliness that are missing from the other airlines I have flown recently.

Friendly efficient crew, but plane had no way to charge phone. That is a near necessity with today’s travel where we carry out travel documents on our phones.

Orlando to Canada, despite being close and an international flight, the plane was not at all comfortable. It felt like the chair was being pushed forward, in addition to not having a TV and having to choose from a tiny glass of drink, for example, water or soda. I couldn't have both. When I asked the flight attendant for an extra glass of water, she looked at me with an ugly face. This is ridiculous. They don't want to give water to passengers. I will never fly with this airline again in my life.

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

This was an excellent experience for a very short flight.

No space in overhead bin, one cookie, 2 oz of juice - is not customer service.

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

The ground staff was so rude in Toronto airport ...very rude and did not answer simple questions, and made me look like a fool. Very rude ground staff.

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

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

Information on your arrival and departure airports

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