STL - YYZ

C$ 217 Find Cheap Flights from St. Louis to Toronto – 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 St. Louis to Toronto departing on 24/9. 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$ 496
Typical prices: C$ 747-C$ 1,005
American Airlines
Sat 29/8Sat 5/9
STL - YYZ • 1 stop
Cheapest direct flights
C$ 744
Typical prices: C$ 780-C$ 1,043
Air Canada
Sun 13/9Sun 20/9
STL - YYZ • Direct
Top airlines
American Airlines
Cheapest • from C$ 496 (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 2h 00m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to travel
December
Cheapest • 24% price drop
August
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

Sat, 29 Aug - Sat, 5 Sep
American Airlines Logo
5:00 a.m. - 2:33 p.m.
STL
-
YYZ
8h 33m
1 stop
American Airlines Logo
7:29 a.m. - 4:43 p.m.
YYZ
-
STL
10h 14m
1 stop
C$ 496American Airlines
Thu, 17 Sep - Mon, 28 Sep
American Airlines Logo
7:27 a.m. - 5:44 p.m.
STL
-
YYZ
9h 17m
1 stop
American Airlines Logo
1:15 p.m. - 12:27 a.m.
YYZ
-
STL
12h 12m
1 stop
C$ 496American Airlines
Thu, 29 Oct - Mon, 2 Nov
Multiple Airlines Logo
10:35 a.m. - 5:15 p.m.
STL
-
YYZ
29h 40m
2 stops
Multiple Airlines Logo
6:30 a.m. - 7:39 p.m.
YYZ
-
STL
14h 09m
1 stop
C$ 500Multiple Airlines
Thu, 24 Sep - Mon, 28 Sep
American Airlines Logo
7:27 a.m. - 5:44 p.m.
STL
-
YYZ
9h 17m
1 stop
American Airlines Logo
1:15 p.m. - 12:27 a.m.
YYZ
-
STL
12h 12m
1 stop
C$ 514American Airlines
Thu, 17 Sep - Mon, 21 Sep
American Airlines Logo
5:00 a.m. - 2:32 p.m.
STL
-
YYZ
8h 32m
1 stop
American Airlines Logo
1:15 p.m. - 12:27 a.m.
YYZ
-
STL
12h 12m
1 stop
C$ 514American Airlines
Sat, 12 Sep - Tue, 15 Sep
American Airlines Logo
11:01 a.m. - 11:26 p.m.
STL
-
YYZ
11h 25m
1 stop
American Airlines Logo
6:30 a.m. - 4:48 p.m.
YYZ
-
STL
11h 18m
1 stop
C$ 514American Airlines
Thu, 17 Sep - Mon, 28 Sep
American Airlines Logo
7:27 a.m. - 5:44 p.m.
STL
-
YYZ
9h 17m
1 stop
American Airlines Logo
1:15 p.m. - 12:27 a.m.
YYZ
-
STL
12h 12m
1 stop
C$ 514American Airlines
Mon, 21 Sep - Tue, 22 Sep
American Airlines Logo
7:21 a.m. - 6:35 p.m.
STL
-
YYZ
10h 14m
1 stop
American Airlines Logo
11:40 a.m. - 8:44 p.m.
YYZ
-
STL
10h 04m
1 stop
C$ 514American Airlines
Sun, 13 Sep - Sun, 20 Sep
Air Canada Logo
8:55 a.m. - 11:49 a.m.
STL
-
YYZ
1h 54mdirect
Air Canada Logo
12:55 p.m. - 2:00 p.m.
YYZ
-
STL
2h 05mdirect
C$ 744Air Canada
Thu, 10 Sep - Thu, 17 Sep
Air Canada Logo
8:55 a.m. - 11:49 a.m.
STL
-
YYZ
1h 54mdirect
Air Canada Logo
12:55 p.m. - 2:00 p.m.
YYZ
-
STL
2h 05mdirect
C$ 807Air Canada
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 August.

Flight prices are below average for this route right now.

Flights to Toronto Pearson Intl Airport from St. Louis usually cost between C$ 714 and C$ 1,059 in August.
The lowest price found in the past 5 days was C$ 496 on American Airlines (29 Aug–5 Sep).

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 Saturday and more expensive on a Thursday. 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 December, where tickets cost C$ 656 (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$ 1,290 and C$ 1,101 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$ 287, 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 season

April

Cheapest flight

C$ 217
Best time to beat the crowds but there is an average 27% increase in price.
Most popular time to fly (2% more expensive 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 5 days, the lowest price for a flight from St. Louis to Toronto Pearson Intl Airport was C$ 217 for a one-way ticket and C$ 496 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$ 260 or less one-way.

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 11407 reviews
6.3Food
7.3Boarding
7.1Comfort
7.8Crew
6.8Entertainment
Airline reviews

Fine and uneventful I got to my destination safely No inflight entertainment Seats are not very comfortable

10.0 ExcellentKelly, Jul 2026
IND - YYZ
Read more Air Canada reviews

Fine and uneventful I got to my destination safely No inflight entertainment Seats are not very comfortable

The upgraded seats on the smaller flights I guess is a toss up if you get a full meal. We paid less for the ticket on the way there and got a full meal where we got a snack and drink on the way home. The lounge was also in the other terminal too. No entertainment on the seat and no wifi on the plane.

Unfortunately, my experience was disappointing. The crew were not friendly or welcoming, which made the flight less pleasant. Our flight was delayed, and we almost missed our connecting flight because of it. To make matters worse, the gate number shown on the digital ticket was incorrect, causing unnecessary confusion and stress before departure. Overall, the lack of accurate information and poor customer service made this a frustrating travel experience.

Good but I don’t received my bags yet is been 5days still no update

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Friendlier staff who are nice to the elderly who need assistance

Service was great. Flight was delayed an hour which made our connection very tight and stressful. But we fortunately made it.

There was a mistake with the first name we only discovered at security. Air canada was unable to correct it to match then passport since it was booked through an agency. The agency could not correct it either since they need at least two hours to do that. We could not fly and lost a bunch of money. Learned my lesson about kayak.

I appreciate the fact that the flight took off and landed on time What I didn’t like they never offer a snack eg nuts/cookies/chips

Air Canada seems to be understaffed which caused delays at every point of the flight—delays at departure, delays in the air (circling), delay after landing, delays at the gate before disembarking. Horrible experience. And my son, who departed Toronto today, experienced delays because the passport scanning system was down and was told that he would not be able to board his flight. Toronto airport is a mess!!!!

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)