STL - YYZ

C$ 128 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 24/2. 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 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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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
C$ 296
Overall average: C$ 639
Multiple Airlines
Wed 25/2Wed 4/3
STL - YYZ • 1 stop
Cheapest direct flights
C$ 619
Overall average: C$ 474
Air Canada
Thu 12/2Sun 15/2
STL - YYZ • 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 offers 15 cm more legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
American Airlines
Cheapest • from C$ 490 (round-trip)
Air Canada
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
6 weeks
in advance
Our data shows that travellers who book at least 6 weeks in advance save around 64% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
May
Cheapest • 23% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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, 25 Feb - Wed, 4 Mar
Multiple Airlines Logo
3:49 p.m. - 11:26 a.m.
STL
-
YYZ
18h 37m
1 stop
Multiple Airlines Logo
7:15 a.m. - 10:27 p.m.
YYZ
-
STL
16h 12m
1 stop
C$ 296Multiple Airlines
Mon, 2 Mar - Tue, 3 Mar
Multiple Airlines Logo
3:49 p.m. - 12:14 a.m.
STL
-
YYZ
7h 25m
1 stop
Multiple Airlines Logo
7:15 a.m. - 10:27 p.m.
YYZ
-
STL
16h 12m
1 stop
C$ 308Multiple Airlines
Sun, 1 Mar - Thu, 5 Mar
Multiple Airlines Logo
10:11 p.m. - 6:43 a.m.
STL
-
YYZ
31h 32m
1 stop
Multiple Airlines Logo
8:20 p.m. - 7:02 a.m.
YYZ
-
STL
11h 42m
1 stop
C$ 337Multiple Airlines
Sun, 1 Mar - Tue, 3 Mar
Multiple Airlines Logo
10:11 p.m. - 7:36 p.m.
STL
-
YYZ
20h 25m
2 stops
Multiple Airlines Logo
7:10 a.m. - 10:27 p.m.
YYZ
-
STL
16h 17m
1 stop
C$ 339Multiple Airlines
Sun, 1 Mar - Thu, 5 Mar
Multiple Airlines Logo
10:11 p.m. - 9:11 p.m.
STL
-
YYZ
22h 00m
2 stops
Multiple Airlines Logo
8:20 p.m. - 7:02 a.m.
YYZ
-
STL
11h 42m
1 stop
C$ 342Multiple Airlines
Wed, 18 Feb - Fri, 20 Feb
Multiple Airlines Logo
3:49 p.m. - 12:14 a.m.
STL
-
YYZ
7h 25m
1 stop
Multiple Airlines Logo
7:10 a.m. - 12:27 a.m.
YYZ
-
STL
18h 17m
1 stop
C$ 353Multiple Airlines
Wed, 25 Feb - Wed, 4 Mar
Multiple Airlines Logo
8:17 p.m. - 11:26 a.m.
STL
-
YYZ
14h 09m
2 stops
Multiple Airlines Logo
7:15 a.m. - 10:27 p.m.
YYZ
-
STL
16h 12m
1 stop
C$ 360Multiple Airlines
Sat, 28 Feb - Wed, 4 Mar
Multiple Airlines Logo
2:51 p.m. - 6:43 a.m.
STL
-
YYZ
38h 52m
2 stops
Multiple Airlines Logo
8:20 p.m. - 11:59 p.m.
YYZ
-
STL
28h 39m
1 stop
C$ 362Multiple Airlines
Tue, 3 Mar - Tue, 17 Mar
Multiple Airlines Logo
3:49 p.m. - 12:14 a.m.
STL
-
YYZ
7h 25m
1 stop
Multiple Airlines Logo
7:10 a.m. - 11:19 p.m.
YYZ
-
STL
17h 09m
1 stop
C$ 371Multiple Airlines
Tue, 3 Mar - Tue, 17 Mar
Multiple Airlines Logo
3:49 p.m. - 12:14 a.m.
STL
-
YYZ
7h 25m
1 stop
Multiple Airlines Logo
1:30 p.m. - 11:19 a.m.
YYZ
-
STL
22h 49m
2 stops
C$ 380Multiple 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.

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 Wednesday. On your return trip to St. Louis, you should consider flying back on a Thursday, 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 May, where tickets cost C$ 561 (return) on average. On the other hand, the most expensive months are January and October, where the average cost of round-trip tickets is C$ 1,199 and C$ 915 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$ 228, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from St. Louis to Toronto Pearson Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure 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 average of all the values for each week.

To get a below average price on the flight from St. Louis to Toronto Pearson Intl Airport, you should book around 6 weeks before departure, which saves you about 64% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

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.

Good to know

Low seasonFebruary
Cheapest flightC$ 128
Best time to beat the crowds (12% less 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 3 days, the lowest price for a flight from St. Louis to Toronto Pearson Intl Airport was C$ 128 for a one-way ticket and C$ 296 for a round-trip.

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

    Air Canada, 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?

    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.

  • Which airlines provide the cheapest flights from St. Louis to Toronto?

    In the past 3 days, the cheapest round-trip tickets from St. Louis to Toronto were found on American Airlines (C$ 490) and Air Canada (C$ 619).

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 10667 reviews
6.8Entertainment
7.3Boarding
6.3Food
7.1Comfort
7.8Crew
Airline reviews

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.

4.0 OkayLarissa, Jan 2026
FLL - YYZ
Read more Air Canada reviews

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

I would like to get my money back. I flight was 4 hours late on the way to detroit, And same on my way back to Brussels they cancelled my flight and give me an other ticket and i had to wait 5 hours.

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

My seat was one of those that couldn't recline, but the problem was that it was abnormally upright, so the headrest actually made the seat concave, which was uncomfortable and hard on my lower back. I had to ball my jacket up and use it as lumbar support. goodness I had it with me.

I liked a lot , the flight attendant so nice ,the seat very comfortable I enjoyed the flight , I will do it again with Air Canada,

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

Information on your arrival and departure airports