YYZ - STL

C$ 278 Find Cheap Flights from Toronto to St. Louis – Compare and Save

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 16/9. 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

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Everything you should know

Cheapest round-trip
C$ 491
Typical prices: C$ 630-C$ 809
American Airlines
Tue 22/9Sat 26/9
YYZ - STL • 1 stop
Cheapest direct flights
C$ 632
Typical prices: C$ 596-C$ 856
Air Canada
Fri 14/8Fri 21/8
YYZ - STL • Direct
Top airlines
Cheapest • from C$ 491 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Direct flights
You can fly direct with Air Canada. Average duration is 2h 07m
Direct flights
Direct flights
+1
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Direct flights
Direct flights
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Top layover airports
Cheapest • Avg C$ 613 (round-trip)
Shortest trip • 4h 22m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 53% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 18% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
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We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Expert advice
Flight 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

Tue, 22 Sep - Sat, 26 Sep
American Airlines Logo
6:30 a.m. - 1:16 p.m.
YYZ
-
STL
7h 46m
1 stop
American Airlines Logo
5:00 a.m. - 2:32 p.m.
STL
-
YYZ
8h 32m
1 stop
C$ 491American Airlines
Tue, 21 Jul - Wed, 22 Jul
American Airlines Logo
11:39 a.m. - 8:11 p.m.
YYZ
-
STL
9h 32m
1 stop
American Airlines Logo
6:55 a.m. - 5:34 p.m.
STL
-
YYZ
9h 39m
1 stop
C$ 503American Airlines
Wed, 5 Aug - Wed, 26 Aug
American Airlines Logo
3:14 p.m. - 12:14 a.m.
YYZ
-
STL
10h 00m
1 stop
American Airlines Logo
6:00 a.m. - 2:33 p.m.
STL
-
YYZ
7h 33m
1 stop
C$ 504American Airlines
Sat, 29 Aug - Wed, 2 Sep
American Airlines Logo
11:39 a.m. - 6:57 p.m.
YYZ
-
STL
8h 18m
1 stop
American Airlines Logo
9:32 a.m. - 6:30 p.m.
STL
-
YYZ
7h 58m
1 stop
C$ 505American Airlines
Wed, 29 Jul - Wed, 5 Aug
American Airlines Logo
3:14 p.m. - 12:16 a.m.
YYZ
-
STL
10h 02m
1 stop
American Airlines Logo
6:00 a.m. - 2:33 p.m.
STL
-
YYZ
7h 33m
1 stop
C$ 515American Airlines
Wed, 29 Jul - Wed, 5 Aug
American Airlines Logo
3:14 p.m. - 12:16 a.m.
YYZ
-
STL
10h 02m
1 stop
American Airlines Logo
6:00 a.m. - 2:33 p.m.
STL
-
YYZ
7h 33m
1 stop
C$ 517American Airlines
Mon, 31 Aug - Wed, 30 Sep
American Airlines Logo
3:14 p.m. - 12:14 a.m.
YYZ
-
STL
10h 00m
1 stop
American Airlines Logo
5:00 a.m. - 2:32 p.m.
STL
-
YYZ
8h 32m
1 stop
C$ 556American Airlines
Mon, 31 Aug - Wed, 30 Sep
Multiple Airlines Logo
8:35 p.m. - 5:50 p.m.
YYZ
-
STL
22h 15m
1 stop
Multiple Airlines Logo
10:35 a.m. - 2:05 p.m.
STL
-
YYZ
26h 30m
2 stops
C$ 558Multiple Airlines
Thu, 13 Aug - Thu, 20 Aug
American Airlines Logo
3:14 p.m. - 12:14 a.m.
YYZ
-
STL
10h 00m
1 stop
American Airlines Logo
6:00 a.m. - 2:33 p.m.
STL
-
YYZ
7h 33m
1 stop
C$ 595American Airlines
Wed, 22 Jul - Thu, 23 Jul
American Airlines Logo
7:17 a.m. - 1:53 p.m.
YYZ
-
STL
7h 36m
1 stop
American Airlines Logo
3:20 p.m. - 11:13 p.m.
STL
-
YYZ
6h 53m
1 stop
C$ 600American Airlines
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.

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

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

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.

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

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 January, where tickets cost C$ 599 (return) on average. On the other hand, the most expensive months are April and July, where the average cost of round-trip tickets is C$ 1,137 and C$ 893 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 C$ 660, 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 53% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Expert advice

Expert advice for your flight from Toronto to St. Louis

 
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 and United Airlines

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.

Good to know

Low seasonApril
Cheapest flightC$ 278
Best time to beat the crowds but there is an average 54% 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 5 days, the lowest price for a flight from Toronto Pearson Intl Airport to St. Louis was C$ 278 for a one-way ticket and C$ 491 for a round-trip.

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

    Air Canada, and Spirit 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?

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Toronto to St. Louis are United Airlines and WestJet. With an average price for the route of C$ 670 and an overall rating of 7.4, United Airlines is the most popular choice. WestJet is also a great choice for the route, with an average price of C$ 1,013 and an overall rating of 7.2.

  • 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 travellers 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.

  • 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 C$ 384 or less one-way and C$ 597 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

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 nonstop flights

Direct returns

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 nonstop flights

Reviews of the top 4 airlines 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.
7.4
United AirlinesOverall score based on 9929 reviews
8.1Crew
7.3Comfort
7.7Boarding
7.1Entertainment
6.7Food
Airline reviews

Prefer not to have an almost 3 hour delay with useless communication that wasn't accurate.

2.0 MediocreGreg, Jun 2026
YYZ - ORD
Read more United Airlines reviews

Prefer not to have an almost 3 hour delay with useless communication that wasn't accurate.

Boarding was smooth and efficient. The only food was some pretzels, but it was a short flight. Not much to order if you were hungry.

Seats very comfortable; service efficient and pleasant; flight was on-time; boarding organized.

Starlink is great Crew was polite Business class didn’t get a welcome drink just water and snacks were ok

Hopped on time for the flight only to get deplaned and delayed another 2.5 hours.

Flight attendants had a little attitude. Food tastes no good.

Airport terminal was outdated, flight was on a small jet with no wifi

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

Experience was good, the wifi hook up is somewhat tough

I will not be flying with westjet again. I was uncomfortable in my seat. The position made my back hurt so bad. My wife was able to fit the seatbelt around her with out an extension but was unable to put the tray table down or fit in the seat for that matter. Our bag was smashed and I spent two hours trying to fill out the application for a damaged bag before I gave up. The 80 photos I took would not work and nothing telling me the format to upload them as.. I made the mistake of unpacking the bag before taking photos so no claim for me. Next trip to Canada I will have to use air Canada.

Airplane is too small. Crew, especially the flight attendant who looked after our area, was not at all friendly and a touch authoratative. She may have been the most gruff flight attendant i've come across in 40 years of business travel

I selected "carry-on" for a round trip on Kayak, but my return flight on WestJet did not include a carry-on and they would not allow me to add one. My only option was to add a "checked bag" which I had to wait for on the luggage carousel after landing. Not a good experience.

Absolutely terrible, from the customer service to boarding the plane. On the phone, there was some mishaps with getting in my correct date and they did not help me retrieve a refund or any assistance. I’m gonna be reporting to all my followers and family around the region of Los Angeles to New York.

Nothing to like because my inbound flight was cancelled without notification by West Jet or third party, JustFly. I couldn’t take the inbound flight due to cancellation; therefore could not take the outbound flight back.

Will never book through you again. Very disappointed in the notices and action taken or provided when planes are rescheduled, enough to cause missed connections

Still sitting in a hotel when I'm due for work

Never been on a long haul flight that didn't have on flight entertainment. I hope the way back is better !

Very easy boarding. The on board snacks were not good.

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Improvements in communication and empathy are absolutely necessary for American Airlines staff (top down). It’s like they are numb to the needs of their customers.

I like the speed of boarding and deplaning and the fact that everything was on time. The crew (attendants) were probably quite new and did not begin the in cabin service until 30 min before landing even though there was little to no air turbulence for the last 1.5 hours of the flight. It made for a mad scramble at the end to get trash collected and carts stowed before touch down.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

I did like the employee's, they are very friendly and all smiled most of the time, Overall, from checking in bags to getting on plane, not enough employees to be able to get all on the plane, therefore I was not able to get on the plane, due to no one wea there for me to check in my bag, so I decided to go thru the security point and by the time they were done with my bags, I was told that my bag cannot be checked in, and then found out that the lady that does the check in was boarding the customers onto the plane, she said that she was going back and fourth, there for was not able to get on the plane, which changed all my flights by the time I got to Dallas, I was on standby 3 times, and wasn't sure about being able to get on the fourth plane, so ended up buying another plane ticket, so I could make my destination on time.

Not sure about entertainment as I didn't use any, so maybe there should be an NA option on this survey. Otherwise everything was just as it should be. Of course I wish planes were more comfortable and had seats that would tilt back further.

American Airlines “Randy” questioned why I needed preboarding and denied my request for same. Then Randy attempted to berate me when I boarded with my group. I was seated in an exit roll with a young man with a disability that exhibited difficulty controlling and settling himself. But Tandy questioned my disability. The flight was horrible. It was overpacked.

Canceled my flight in March and have been waiting for 3 months now without the refund after it was promised

Smooth ride but I wish they have better food selections.

Aircraft is designed with all 3 washrooms at the back of the plane, meaning that when there is service underway, there are no washrooms available and it gets very crowded at the back of the plane.

It was a nice and smooth trip. Gave a friendly environment throughout the journey.

Meal and drink service was good. Old plane with old business class seats were quite disappointing

Flight itself was not bad at all. However: my checked bag (checked in Calgary) did not make it onto this flight as I found out after I landed at EWR. I still don't have it but it appears that it is on its way to me.

Flight and attendance were very good we had 2 hour delay that took the shine of it

The seat design in the premium economy section leaves virtually no room under the seat to store a bag or purse. Other than that, it was a great flight. Arrived early.

The flight was delayed, but not for weather. We landed over 3hrs later than planned.

Seriously need to improve the time schedule and the plans

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

Information on your arrival and departure airports