STL - YYZ

$152 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 4/20. 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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Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$402
Typical prices: $530-$754
Multiple Airlines
Thu 4/2Tue 4/7
STL - YYZ • 2 stops
Cheapest non-stop
$510
Typical prices: $271-$1,238
Air Canada
Sun 4/26Sun 5/3
STL - YYZ • Non-stop
Advice from real travelers
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
Cheapest • from $435 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Air Canada. Average duration is 2h 01m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $524 (round-trip)
Shortest trip • 4h 01m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 43% price drop
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

Thu, Apr 2 - Tue, Apr 7
Multiple Airlines Logo
6:29 pm - 2:20 pm
STL
-
YYZ
18h 51m
2 stops
Multiple Airlines Logo
7:10 am - 11:25 pm
YYZ
-
STL
17h 15m
1 stop
$402Multiple Airlines
Tue, Apr 14 - Fri, Apr 17
Multiple Airlines Logo
4:59 pm - 2:20 pm
STL
-
YYZ
20h 21m
1 stop
Multiple Airlines Logo
2:20 pm - 6:50 am
YYZ
-
STL
17h 30m
2 stops
$406Multiple Airlines
Sat, Apr 18 - Wed, Apr 22
Multiple Airlines Logo
4:16 pm - 6:20 am
STL
-
YYZ
13h 04m
1 stop
Multiple Airlines Logo
6:30 am - 10:30 am
YYZ
-
STL
29h 00m
2 stops
$417Multiple Airlines
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
9:50 am - 9:09 pm
STL
-
YYZ
10h 19m
2 stops
Multiple Airlines Logo
7:10 am - 11:25 pm
YYZ
-
STL
17h 15m
1 stop
$423Multiple Airlines
Fri, Apr 10 - Mon, Apr 13
Multiple Airlines Logo
9:50 am - 9:09 pm
STL
-
YYZ
10h 19m
2 stops
Multiple Airlines Logo
7:10 am - 11:25 pm
YYZ
-
STL
17h 15m
1 stop
$431Multiple Airlines
Thu, Apr 2 - Tue, Apr 7
American Airlines Logo
6:00 am - 5:36 pm
STL
-
YYZ
10h 36m
1 stop
American Airlines Logo
11:33 am - 7:33 pm
YYZ
-
STL
9h 00m
1 stop
$435American Airlines
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
9:50 am - 9:09 pm
STL
-
YYZ
10h 19m
2 stops
Multiple Airlines Logo
7:10 am - 11:25 pm
YYZ
-
STL
17h 15m
1 stop
$441Multiple Airlines
Wed, May 20 - Mon, Jun 1
Multiple Airlines Logo
5:27 pm - 2:05 pm
STL
-
YYZ
19h 38m
2 stops
Multiple Airlines Logo
9:45 am - 6:06 pm
YYZ
-
STL
33h 21m
1 stop
$446Multiple Airlines
Wed, Mar 25 - Sat, Mar 28
Multiple Airlines Logo
4:51 pm - 2:16 pm
STL
-
YYZ
20h 25m
1 stop
Multiple Airlines Logo
3:25 pm - 6:57 am
YYZ
-
STL
16h 32m
1 stop
$452Multiple Airlines
Thu, Apr 2 - Tue, Apr 7
Multiple Airlines Logo
9:50 am - 9:09 pm
STL
-
YYZ
10h 19m
2 stops
Multiple Airlines Logo
7:10 am - 11:25 pm
YYZ
-
STL
17h 15m
1 stop
$454Multiple 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.

How much is a round-trip flight from St. Louis to Toronto Pearson Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Toronto Pearson Intl Airport departing in April.

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 Sunday, 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 March, where tickets cost $310 (return) on average. On the other hand, the most expensive months are January and April, where the average cost of round-trip tickets is $916 and $681 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.

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 seasonJanuary
Cheapest flight$152
Best time to beat the crowds but there is an average 69% increase in price.
Most popular time to fly with an average 4% increase 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 $152 for a one-way ticket and $386 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, Spirit Airlines, 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 Air Canada?

    The two airlines most popular with KAYAK users for flights from St. Louis to Toronto are United Airlines and Air Canada. With an average price for the route of $533 and an overall rating of 7.4, United Airlines is the most popular choice. Air Canada is also a great choice for the route, with an average price of $561 and an overall rating of 7.1.

  • 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.

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 $347 or less one-way and $724 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 9427 reviews
8.1Crew
7.1Entertainment
6.6Food
7.7Boarding
7.3Comfort
Airline reviews

Entertainment kept turning itself off. Gave up on watching a movie.

8.0 ExcellentLeslie, Feb 2026
SFO - YYZ
Read more United Airlines reviews

Entertainment kept turning itself off. Gave up on watching a movie.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Fine not above and beyond as I had a connection that was delayed due to maintenance

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.

Easy boarding. Rows are smaller but that may be an older and bigger me now :)

It would have been nice if American tried to care.

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

I booked 1st class, my flights were changed and I was sitting in the middle at the back of the plane. A far cry from the 1st class I purchased for my flights. I am grateful I arrived on time.

Aging planer and NO wifi on a 14 hour day flight. Unless you are retired or don't need to work or be in touch with the world... The lack of Wifif really ruined the flight. And the old plane - really showing it's age, wasn't great

There was no beverage service and the only time I saw a crew member walk through the cabin is when we were preparing to land.

Our flight was delayed 3 times and this is why I am giving such low reviews. Everything else was okay but being in the airport at 4:30pm for my initial flight at 7pm to not leave until after 9:30pm is insane,

Flights were constantly delayed. CRW took 50 minutes to get bags

Flight has been delayed every time I've ever taken it. Seats uncomfortable. Children behind me yelling the entire flight. Some of this is out of their control but overall just consistently not a great experience.

Appreciate having multiple food options for allergies. Nice to have an extra seat between us for comfort.

I want to thank Carlos at the Miami AC desk - he was amazing and went over and above to help us out. Thank you Carlos and all the best to you!!! You made our faith in AC feel great! Sincerely, David Cubitt

Flight was canceled due to mechanical issues. After a considerable wait in the queue, Air Canada customer service was very helpful to get us on another flight. I am disappointed to report our rescheduled flight is for three days from now. Three days of extra expenses and inconvenience is unacceptable.

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

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

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

Information on your arrival and departure airports