STL - YYZ

$94 Find Cheap Flights from St. Louis to Toronto

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Toronto departing on 2/24. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Toronto Pearson Intl Airport

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

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Everything you should know

Cheapest round-trip
$218
Overall average: $471
Multiple Airlines
Wed 2/25Wed 3/4
STL - YYZ • 1 stop
Cheapest non-stop
$456
Overall average: $349
Air Canada
Thu 2/12Sun 2/15
STL - YYZ • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Economy Plus offers six inches more legroom.
Avoid peak hours at STL for a smoother experience.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
American Airlines
Cheapest • from $361 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
6 weeks
in advance
Our data shows that travelers who book at least 6 weeks in advance save around 64% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
May
Cheapest • 23% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Toronto!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Toronto 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 St. Louis to Toronto

Wed, Feb 25 - Wed, Mar 4
Multiple Airlines Logo
3:49 pm - 11:26 am
STL
-
YYZ
18h 37m
1 stop
Multiple Airlines Logo
7:15 am - 10:27 pm
YYZ
-
STL
16h 12m
1 stop
$218Multiple Airlines
Mon, Mar 2 - Tue, Mar 3
Multiple Airlines Logo
3:49 pm - 12:14 am
STL
-
YYZ
7h 25m
1 stop
Multiple Airlines Logo
7:15 am - 10:27 pm
YYZ
-
STL
16h 12m
1 stop
$227Multiple Airlines
Sun, Mar 1 - Thu, Mar 5
Multiple Airlines Logo
10:11 pm - 6:43 am
STL
-
YYZ
31h 32m
1 stop
Multiple Airlines Logo
8:20 pm - 7:02 am
YYZ
-
STL
11h 42m
1 stop
$248Multiple Airlines
Sun, Mar 1 - Tue, Mar 3
Multiple Airlines Logo
10:11 pm - 7:36 pm
STL
-
YYZ
20h 25m
2 stops
Multiple Airlines Logo
7:10 am - 10:27 pm
YYZ
-
STL
16h 17m
1 stop
$250Multiple Airlines
Sun, Mar 1 - Thu, Mar 5
Multiple Airlines Logo
10:11 pm - 9:11 pm
STL
-
YYZ
22h 00m
2 stops
Multiple Airlines Logo
8:20 pm - 7:02 am
YYZ
-
STL
11h 42m
1 stop
$252Multiple Airlines
Wed, Feb 18 - Fri, Feb 20
Multiple Airlines Logo
3:49 pm - 12:14 am
STL
-
YYZ
7h 25m
1 stop
Multiple Airlines Logo
7:10 am - 12:27 am
YYZ
-
STL
18h 17m
1 stop
$260Multiple Airlines
Wed, Feb 25 - Wed, Mar 4
Multiple Airlines Logo
8:17 pm - 11:26 am
STL
-
YYZ
14h 09m
2 stops
Multiple Airlines Logo
7:15 am - 10:27 pm
YYZ
-
STL
16h 12m
1 stop
$265Multiple Airlines
Sat, Feb 28 - Wed, Mar 4
Multiple Airlines Logo
2:51 pm - 6:43 am
STL
-
YYZ
38h 52m
2 stops
Multiple Airlines Logo
8:20 pm - 11:59 pm
YYZ
-
STL
28h 39m
1 stop
$267Multiple Airlines
Tue, Mar 3 - Tue, Mar 17
Multiple Airlines Logo
3:49 pm - 12:14 am
STL
-
YYZ
7h 25m
1 stop
Multiple Airlines Logo
7:10 am - 11:19 pm
YYZ
-
STL
17h 09m
1 stop
$273Multiple Airlines
Tue, Mar 3 - Tue, Mar 17
Multiple Airlines Logo
3:49 pm - 12:14 am
STL
-
YYZ
7h 25m
1 stop
Multiple Airlines Logo
1:30 pm - 11:19 am
YYZ
-
STL
22h 49m
2 stops
$280Multiple Airlines
Booking Insights

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

Get data-powered insights and trends into flights from St. Louis to Toronto 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 St. Louis to Toronto?

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

For St. Louis to Toronto, Tuesday is the cheapest day to fly on average and Friday is the most expensive. Flying from Toronto back to St. Louis, the best deals are generally found on Tuesday, with Wednesday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Toronto Pearson Intl Airport, 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 St. Louis to Toronto Pearson Intl Airport is May, where tickets cost $413 (return) on average. On the other hand, the most expensive months are January and October, where the average cost of round-trip tickets is $883 and $674 respectively.

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

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $492 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Toronto Pearson Intl Airport, 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 St. Louis to Toronto Pearson Intl Airport, you should book around 6 weeks before departure, which saves you about 64% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Expert advice

Expert advice for your flight from St. Louis to Toronto

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada, United Airlines and YYZ

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.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL

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.

Good to know

Low seasonFebruary
Cheapest flight$94
Best time to beat the crowds with an average 12% drop in price.
Flight from St. Louis to Toronto

When to book flights from St. Louis to Toronto

Are your dates flexible? Find out the best times to travel from St. Louis to Toronto 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 St. Louis to Toronto flights

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

    In the last 3 days, the lowest price for a flight from St. Louis to Toronto Pearson Intl Airport was $94 for a one-way ticket and $218 for a round-trip.

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

    Yes

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

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

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

    The Embraer 175 is the aircraft model that flies most regularly on the St. Louis to Toronto flight route.

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

    oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Toronto, with oneworld being the most commonly used for this route.

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

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

  • Which is the best airline for flights from St. Louis to Toronto, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Toronto are United Airlines and American Airlines. With an average price for the route of $489 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $545 and an overall rating of 7.2.

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

    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 St. Louis to Toronto.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Toronto from St. Louis 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 St. Louis to Toronto?

    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 Toronto with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and YYZ 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 St. Louis to Toronto?

    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 Toronto from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from St. Louis to Toronto?

    In the past 3 days, the cheapest round-trip tickets from St. Louis to Toronto were found on American Airlines ($361) and Air Canada ($456).

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

  • Looking for a cheap flight? 25% of our users found flights on this route for $287 or less one-way and $654 or less round-trip.

Prefer to fly direct from St. Louis to Toronto?

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

Direct departures

Lambert-St Louis to Toronto Pearson Intl

Monday

Air Canada

Air Canada

Tuesday

Air Canada

Air Canada

Wednesday

Air Canada

Air Canada

Thursday

Air Canada

Air Canada

Friday

Air Canada

Air Canada

Saturday

Air Canada

Air Canada

Sunday

Air Canada

Air Canada

See more direct flights

Direct returns

Toronto Pearson Intl to Lambert-St Louis

Monday

Air Canada

Air Canada

Tuesday

Air Canada

Air Canada

Wednesday

Air Canada

Air Canada

Thursday

Air Canada

Air Canada

Friday

Air Canada

Air Canada

Saturday

Air Canada

Air Canada

Sunday

Air Canada

Air Canada

See more direct flights

Reviews of the top 3 airlines serving from St. Louis to Toronto

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Toronto. 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 St. Louis to Toronto? 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.
7.4
United AirlinesOverall score based on 9213 reviews
8.1Crew
7.3Comfort
7.7Boarding
6.6Food
7.1Entertainment
Airline reviews

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

2.0 MediocreSonje’, Jan 2026
STL - EWR
Read more United Airlines reviews

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Not United Airlines' fault. It's ORL airport's fault.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

Flight was good but there are way to many announcements for credit cards etc.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

Crew was helpful and cheerful especially when they had no refreshments to work with. The plane was never serviced and had nothing but limited water and coffee onboard. For the price point, a concern of services.

Flight was smooth, quick and felt safe. The 2 delays not happening would have been better but I guess that happens in the airline industry

Flight was canceled. I asked to be rerouted to OKC and then took an Uber.

AA did not allow to board a flight because my connecting flight from DFW had been canceled. I got on another flight to another city. No service on the plane and I did not use their entertainment system.

On time on a day with lots of weather cancellations on other flights. Thank you for getting me home during a winter storm!

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

The plane was experiencing problems with the HVAC system, it was very cold in the front of the plane and very hot in the back.

My flight to London from Philadelphia was cancelled due to weather.

The attendants were kind and helpful. A sugar-free drink would have been very welcome.

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

The flight left late and I didn’t get a glass of bubbly upon boarding (which I’m used to when booking business class on other flights), but otherwise it was a pleasant flight with lovely, helpful crew members and I enjoyed my meal.

Flight was canceled for a reason they knew hours before but did not mention. Next the gate chnage from 37 to 38 at least 10 times. Ridiculous.

It was just fine. I managed to make all my connection too sbut had trouble in Munich with no wheel chair and trouble trying to get help from the airport people to get to the other terminal for my flight. Finally a wonderful lady Amelia, helped me to make my flight connection Timon with zero time to spare.

Super experience. Earlier than schedule departure and arrival. Baggage handling was very good

I would like to get my money back. I flight was 4 hours late on the way to detroit, And same on my way back to Brussels they cancelled my flight and give me an other ticket and i had to wait 5 hours.

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

My seat was one of those that couldn't recline, but the problem was that it was abnormally upright, so the headrest actually made the seat concave, which was uncomfortable and hard on my lower back. I had to ball my jacket up and use it as lumbar support. goodness I had it with me.

I liked a lot , the flight attendant so nice ,the seat very comfortable I enjoyed the flight , I will do it again with Air Canada,

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

Information on your arrival and departure airports