YYZ - STL

C$ 203 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 4/2. 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 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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Everything you should know

Cheapest round-trip
C$ 334
Typical prices: C$ 611-C$ 801
Multiple Airlines
Thu 15/1Sun 18/1
YYZ - STL • 1 stop
Cheapest direct flights
C$ 516
Typical prices: C$ 663-C$ 741
Air Canada
Fri 6/3Sun 8/3
YYZ - STL • Direct
Our travellers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Air Canada's Preferred Economy adds 10 cm legroom.
United's Economy Plus provides 15 cm extra legroom.
Expert advice
Expert advice
Expert advice
Expert advice
When to book
4 weeks
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 58% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
June
Cheapest • 16% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Thu, 15 Jan - Sun, 18 Jan
Multiple Airlines Logo
7:10 a.m. - 10:34 p.m.
YYZ
-
STL
16h 24m1 stop
Multiple Airlines Logo
5:11 p.m. - 8:11 p.m.
STL
-
YYZ
26h 00m2 stops
C$ 334Multiple Airlines
Thu, 15 Jan - Sun, 18 Jan
Multiple Airlines Logo
7:10 a.m. - 10:34 p.m.
YYZ
-
STL
16h 24m1 stop
Multiple Airlines Logo
5:11 p.m. - 2:20 p.m.
STL
-
YYZ
20h 09m1 stop
C$ 343Multiple Airlines
Thu, 8 Jan - Sun, 11 Jan
Multiple Airlines Logo
7:10 a.m. - 10:33 p.m.
YYZ
-
STL
16h 23m1 stop
Multiple Airlines Logo
9:46 p.m. - 6:20 a.m.
STL
-
YYZ
31h 34m1 stop
C$ 359Multiple Airlines
Thu, 8 Jan - Sun, 11 Jan
Multiple Airlines Logo
8:00 p.m. - 12:12 p.m.
YYZ
-
STL
17h 12m1 stop
Multiple Airlines Logo
9:46 p.m. - 9:11 p.m.
STL
-
YYZ
22h 25m2 stops
C$ 371Multiple Airlines
Sat, 10 Jan - Mon, 12 Jan
Multiple Airlines Logo
7:15 a.m. - 10:33 p.m.
YYZ
-
STL
16h 18m2 stops
Multiple Airlines Logo
1:07 p.m. - 6:20 a.m.
STL
-
YYZ
16h 13m1 stop
C$ 385Multiple Airlines
Sat, 10 Jan - Sat, 17 Jan
Multiple Airlines Logo
7:55 p.m. - 11:39 a.m.
YYZ
-
STL
16h 44m1 stop
Multiple Airlines Logo
5:11 p.m. - 8:11 p.m.
STL
-
YYZ
26h 00m2 stops
C$ 405Multiple Airlines
Sat, 10 Jan - Mon, 12 Jan
Multiple Airlines Logo
7:55 p.m. - 11:39 a.m.
YYZ
-
STL
16h 44m1 stop
Multiple Airlines Logo
1:07 p.m. - 6:47 a.m.
STL
-
YYZ
16h 40m1 stop
C$ 415Multiple Airlines
Sat, 10 Jan - Mon, 12 Jan
Multiple Airlines Logo
7:55 p.m. - 11:39 a.m.
YYZ
-
STL
16h 44m1 stop
Multiple Airlines Logo
1:07 p.m. - 6:20 a.m.
STL
-
YYZ
16h 13m1 stop
C$ 428Multiple Airlines
Mon, 12 Jan - Wed, 14 Jan
Multiple Airlines Logo
7:15 a.m. - 10:33 p.m.
YYZ
-
STL
16h 18m1 stop
Multiple Airlines Logo
8:32 p.m. - 2:16 p.m.
STL
-
YYZ
16h 44m2 stops
C$ 458Multiple Airlines
Thu, 5 Mar - Sun, 8 Mar
Multiple Airlines Logo
7:10 a.m. - 10:33 p.m.
YYZ
-
STL
16h 23m1 stop
Multiple Airlines Logo
10:44 p.m. - 6:20 a.m.
STL
-
YYZ
30h 36m1 stop
C$ 459Multiple 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 January.

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, Thursday 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 Friday, with Wednesday 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 June, where tickets cost C$ 543 (return) on average. On the other hand, the most expensive months are July and February, where the average cost of round-trip tickets is C$ 735 and C$ 732 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.

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 C$ 576 on average.

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 58% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 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.
Airlines
Air Canada

Air Canada's Preferred Economy seats offer 10 cm extra legroom for added comfort.


Boarding in earlier zones with elite status or higher fare classes ensures overhead space.

United Airlines

Upgrade to Priority Boarding for Zone 2 access, avoiding overhead bin space issues.


Economy Plus offers 15 cm more legroom than standard economy seats, enhancing comfort.

Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada and United Airlines

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

Good to know

Low seasonNovember
Cheapest flightC$ 203
Most popular time to fly and prices are also 16% 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 C$ 203 for a one-way ticket and C$ 334 for a round-trip.

  • 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 Embraer 175 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?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Toronto and St. Louis, with SkyTeam 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, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Toronto to St. Louis are Delta and United Airlines. With an average price for the route of C$ 645 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 631 and an overall rating of 7.4.

  • 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$ 529 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 5 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.
7.9
DeltaOverall score based on 8007 reviews
7.9Comfort
7.3Food
7.9Entertainment
8.5Crew
8.1Boarding
Airline reviews

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

6.0 GoodJeff, Dec 2025
JFK - MIA
Read more Delta reviews

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

For some reason, I couldn't choose my seat. The airline gave me a seat when I got there. Not happy about that. Otherwise, everything else was great!

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

The Sears in the 800s are not too good perfect Airbus why cant the new 737 fix that

Quick and seamless boarding. No entertainment but fast Starlink wifi for this short trip and the staff was really friendly.

I dread trans-Pacific flights. They are very long. This was my first time on Universal, and it was my best crossing ever. The staff were professional, the hospitality was great, and the food was delicious. The entertainment system filled the long flight hours. I will seek out Universal flights from now onwards. 🙂

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

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

The food quality sucks. One must starve if they do not eat flesh Or wheat based products Some variety would be expected. The trivial amount of snacks and or food is inhumane

We Left Calgary 1/2 hour late and that made for a tight connection in Denver. After arriving everything was done to help us make our connection. That was a great effort. Thank You United

Efficient all round, very good crew. Short flight so the food, of course, was just snacks

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

My flight was delayed about 1 1/2 hours in Chicago, but other then that it was a good flight.

Awful. They won’t help me with anything. I booked on American but they abdicated to Iberia. The ticket was overpriced. Everything negative

it was fine, decent flight... dont get food besides cookies or pretzels so not sure why you ask about food. same for entertainment..

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

I got sick nothing contagious but distressing enough and the care I received on the flight was astounding.

Waaay too small plane. They also need to up the size of the overhead bins. I would love to keep me 3k with of camera equipment in my hard case baggahe instead of it being thrown into the belly of the plane

Attendants were pleasant and the flight was smooth and relaxed.

A little late at the start but all worked out well.

It was fine. No drinks nor snacks offered though. I thought that was unusual.

I liked the humor of the captain and crew on the flight from Flagstaff to Dallas. They were humorous.

AA delayed the flight for 3 hours and 50 minutes, but delayed the last 2 hours, 30 minutes at a time, so if we knew before, could have stayed at home and worked instead of being at the airport wasting time... The plane's crew was excellent, not their fault.

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 when to Jamaica for my dad funeral and I did not get my luggage from westjet . I add to buy clothes putting me financial debt i did no want to be in Westjet did not call me to apologize are to inquire about my luggage I am still angry about it

Ground staff was not helpful, but staff at the business counter were excellent.

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.

We landed 26 min early. It was awesome! Smooth ride too.

There is no snack and nit much that would be considered gluten free in yiur food selections. One of your snacks should be a gluten free cookie or small bar etc. maybe it was me but I didn’t see any free movies just internet connection and YouTube .

I like how spacious the plane was but I did not like the fact that there was no entertainment

No dogs! Can we have no dogs in the cabin? Why was there a yappy little dog behind me? Lucky I had ear plugs. Sorry for others without

In spite of purchasing premium, I felt it was perhaps the most uncomfortable seat I have flown in. The base was either broken or poorly made and had no support. Even placing pillows and blankets on the seat (1D aisle) didn’t help. It made for a long and mostly sleepless six hour flight. Crew also were very loudly talking to each other through the night making it very hard to sleep. It was purchased for the price, so I get the risk, but was not impressed.

Good value, minor delay due to waiting for inbound plane but they gave accurate information about wait time. Able to switch to a seat by my husband thanks to a kind flight attendant

It's kindof ridiculous that your system is even asking me about this since my flight was canceled and I wasn't rescheduled.

3 hr delay at the gate while they were doing maintenance. Next time, do not board passengers while maintenance is being performed

Digital check in is very poor with air canada compaired to other airlines

Baggage delayed we had to catch our cruise without any clothes 😒

Air Canada Rouge is great. Toronto Airport is the usual nightmare

Good but need to be better with the flight times.

The staff was great and made the long trip easy peasy!

The free Wi-fi for Aeroplan members was a great touch. The time passed quickly. I found the seats seemed a little closer together than I remember. Not Air Canada's fault, but we were about 20 minutes late landing because the airport was too busy. We had to circle around for a while. The boarding and disembarking went very smoothly.

Extremely turbulent landing. Crew was friendly and plane comfortable. Airport and US pre clearance was understaffed

The airplane is way too tight, you can hardly enter into your row to sit.. more like kids seats than adults.

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

Information on your arrival and departure airports