STL - YYZ

C$ 210 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 9/6. 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
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Everything you should know

Cheapest round-trip
C$ 489
Typical prices: C$ 859-C$ 356
Multiple Airlines
Wed 27/5Wed 3/6
STL - YYZ • 2 stops
Cheapest direct flights
C$ 626
Typical prices: C$ 833-C$ 292
Air Canada
Sat 23/5Sat 30/5
STL - YYZ • Direct
Advice from real travellers
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 offers 15 cm more legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
American Airlines
Cheapest • from C$ 500 (round-trip)
Air Canada
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Every day
You can fly direct with Air Canada. Average duration is 1h 54m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to travel
March
Cheapest • 52% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches hundreds 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, 27 May - Wed, 3 Jun
Multiple Airlines Logo
5:27 p.m. - 9:00 p.m.
STL
-
YYZ
26h 33m
2 stops
Multiple Airlines Logo
7:45 a.m. - 11:57 p.m.
YYZ
-
STL
17h 12m
1 stop
C$ 489Multiple Airlines
Wed, 27 May - Wed, 3 Jun
Multiple Airlines Logo
5:27 p.m. - 9:00 p.m.
STL
-
YYZ
26h 33m
2 stops
Multiple Airlines Logo
9:50 a.m. - 11:57 p.m.
YYZ
-
STL
15h 07m
1 stop
C$ 491Multiple Airlines
Wed, 27 May - Wed, 3 Jun
American Airlines Logo
6:00 a.m. - 5:44 p.m.
STL
-
YYZ
10h 44m
1 stop
American Airlines Logo
7:20 a.m. - 4:30 p.m.
YYZ
-
STL
10h 10m
1 stop
C$ 500American Airlines
Tue, 2 Jun - Sat, 6 Jun
Multiple Airlines Logo
4:19 p.m. - 9:55 p.m.
STL
-
YYZ
28h 36m
2 stops
Multiple Airlines Logo
7:45 a.m. - 11:57 p.m.
YYZ
-
STL
17h 12m
1 stop
C$ 508Multiple Airlines
Tue, 23 Jun - Tue, 30 Jun
American Airlines Logo
1:45 p.m. - 11:29 p.m.
STL
-
YYZ
8h 44m
1 stop
American Airlines Logo
7:25 a.m. - 4:33 p.m.
YYZ
-
STL
10h 08m
1 stop
C$ 528American Airlines
Wed, 27 May - Thu, 28 May
American Airlines Logo
6:00 a.m. - 2:30 p.m.
STL
-
YYZ
7h 30m
1 stop
American Airlines Logo
1:15 p.m. - 8:30 p.m.
YYZ
-
STL
8h 15m
1 stop
C$ 537American Airlines
Wed, 10 Jun - Wed, 17 Jun
Multiple Airlines Logo
4:17 p.m. - 2:30 p.m.
STL
-
YYZ
21h 13m
1 stop
Multiple Airlines Logo
4:45 p.m. - 6:36 p.m.
YYZ
-
STL
26h 51m
2 stops
C$ 543Multiple Airlines
Wed, 10 Jun - Wed, 17 Jun
Multiple Airlines Logo
4:17 p.m. - 4:45 p.m.
STL
-
YYZ
23h 28m
1 stop
Multiple Airlines Logo
4:45 p.m. - 6:36 p.m.
YYZ
-
STL
26h 51m
2 stops
C$ 551Multiple Airlines
Tue, 2 Jun - Mon, 8 Jun
Multiple Airlines Logo
6:33 p.m. - 4:55 p.m.
STL
-
YYZ
21h 22m
2 stops
Multiple Airlines Logo
7:45 a.m. - 11:57 p.m.
YYZ
-
STL
17h 12m
1 stop
C$ 559Multiple Airlines
Wed, 27 May - Thu, 28 May
American Airlines Logo
7:00 a.m. - 5:44 p.m.
STL
-
YYZ
9h 44m
1 stop
American Airlines Logo
11:39 a.m. - 8:30 p.m.
YYZ
-
STL
9h 51m
1 stop
C$ 574American 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 May.

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.

Your flight ticket price will generally be cheaper if you fly to Toronto on a Sunday and more expensive on a Tuesday. On your return trip to St. Louis, you should consider flying back on a Saturday, and avoid Mondays for better deals.

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 C$ 371 (return) on average. On the other hand, the most expensive months are January and April, where the average cost of round-trip tickets is C$ 1,249 and C$ 1,044 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.

No, with an average price for the route of C$ 626, prices are generally cheapest when you fly direct.

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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 United Airlines and Air Canada

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 seasonJanuary
Cheapest flightC$ 195
Best time to beat the crowds but there is an average 62% increase in price.
Most popular time to fly and prices are also 14% lower on average.
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 C$ 210 for a one-way ticket and C$ 489 for a round-trip.

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

    Air Canada, Spirit Airlines, United Airlines, Lufthansa, and American Airlines 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 Canadair (Bombardier) Regional Jet 900 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?

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

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

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

  • 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 travellers 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.

  • 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 C$ 326 or less one-way and C$ 283 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 nonstop 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 nonstop flights

Reviews of the top airline flying 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.
7.1
Air CanadaOverall score based on 10975 reviews
7.3Boarding
6.8Entertainment
7.1Comfort
7.8Crew
6.3Food
Airline reviews

shittiest airline in the hemisphere. To improve - start thinking you're flying people, not cattle

2.0 MediocreAnonymous, Apr 2026
LAS - YYZ
Read more Air Canada reviews

shittiest airline in the hemisphere. To improve - start thinking you're flying people, not cattle

Easy boarding, inflight refreshments came on time and comfortable seat

It was good that our flight left early. It was a nice smooth flight and landing.

It was a problem because there was a delay where we sat before taking off from newark,then when landed in Toronto we sat on tarmac and they wouldn't let us out for a long period of time. When we finally were released to the airport in Toronto the attendant scanned our boarding pass that we were here for our connection to Brazil. We ran all the way to the gate and they said at the gate the door is shut so we can not let you on the plane. We explained that we were checked in by the attendant when we arrived at Toronto airport to go to Brazil and they should not have shut the door. We were ignored at the gate

Flight home was delayed multiple times, did not get home until 2am

the check-in lady at ORD was extremely rude and unprofessional. very disappointed as it was supposed to be a celebration for my wife's birthday and it really put a damper on things. if i wanted to be treated like trash, i would have flown Economy! (as opposed to business class)

My original flight was cancelled and then rebooked four hours later on a recovery flight, but I was checked in as stanby and had no seats so as a family of four we were concerned about not being seated altogether. Our flight then got delayed by another 1.5 hours and when seats were assigned at the gate, three of the four of us were together and we could get my wife closer, they offered no assistance.

Good boarding but extremely cold temperature in both flights (60 F!).

Very rude gate attendants in San Francisco who didn’t let me bring my little carry on (smaller than usual size) and after boarding I realized that there still were a lot of overhead compartment space (like a full section available in some spots). That made me lose 30 minutes at my destination at 1am and it could have broken something fragile that I had in it

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

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

Information on your arrival and departure airports

St. Louis (STL)
Pearson Intl (YYZ)