STL - YYZ

C$ 193 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 25/9. 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

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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Flights 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, 9 Jul - Tue, 15 Jul
 Logo
11:24 a.m. - 2:05 p.m.STL-YYZ
25h 41m2 stops
 Logo
6:30 a.m. - 4:31 p.m.YYZ-STL
11h 01m1 stop
C$ 413
Find Deal
Sun, 13 Jul - Tue, 15 Jul
 Logo
10:47 a.m. - 2:29 p.m.STL-YYZ
26h 42m2 stops
 Logo
6:30 a.m. - 4:31 p.m.YYZ-STL
11h 01m1 stop
C$ 425
Find Deal
Mon, 15 Sep - Wed, 17 Sep
 Logo
8:44 a.m. - 12:30 p.m.STL-YYZ
26h 46m2 stops
 Logo
7:00 a.m. - 7:49 a.m.YYZ-STL
25h 49m3 stops
C$ 427
Find Deal
Mon, 15 Sep - Wed, 17 Sep
American Airlines Logo
5:55 a.m. - 5:49 p.m.STL-YYZ
10h 54m1 stop
American Airlines Logo
11:44 a.m. - 9:53 p.m.YYZ-STL
11h 09m1 stop
C$ 461American Airlines
Find Deal
Sun, 29 Jun - Thu, 3 Jul
Sun Country Air Logo
6:12 a.m. - 4:50 p.m.STL-YYZ
9h 38m1 stop
Sun Country Air Logo
11:40 a.m. - 11:30 a.m.YYZ-STL
24h 50m1 stop
C$ 495Sun Country Air
Find Deal
Tue, 9 Sep - Sat, 13 Sep
American Airlines Logo
5:55 a.m. - 5:49 p.m.STL-YYZ
10h 54m1 stop
American Airlines Logo
11:44 a.m. - 9:53 p.m.YYZ-STL
11h 09m1 stop
C$ 498American Airlines
Find Deal
Sun, 22 Jun - Thu, 26 Jun
Air Canada Logo
7:30 a.m. - 10:25 a.m.STL-YYZ
1h 55mdirect
Air Canada Logo
11:30 a.m. - 12:36 p.m.YYZ-STL
2h 06mdirect
C$ 509Air Canada
Find Deal
Thu, 25 Sep - Sun, 28 Sep
United Airlines Logo
12:25 p.m. - 9:02 p.m.STL-YYZ
7h 37m1 stop
United Airlines Logo
2:10 p.m. - 2:27 p.m.YYZ-STL
25h 17m1 stop
C$ 539United Airlines
Find Deal
Sun, 22 Jun - Thu, 26 Jun
Air Canada Logo
1:30 p.m. - 11:19 p.m.STL-YYZ
8h 49m1 stop
Air Canada Logo
11:30 a.m. - 12:36 p.m.YYZ-STL
2h 06mdirect
C$ 562Air Canada
Find Deal
Sat, 28 Jun - Thu, 24 Jul
United Airlines Logo
5:30 p.m. - 11:58 p.m.STL-YYZ
5h 28m1 stop
United Airlines Logo
9:00 a.m. - 12:27 p.m.YYZ-STL
4h 27m1 stop
C$ 622United Airlines
Find Deal
Expert advice

Expert advice for your flight from St. Louis to Toronto

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
United Airlines

United's Economy Plus offers up to 15 cm more legroom than standard economy seats.


Consider Priority Boarding to ensure overhead bin space, placing you in Zone 2.

Air Canada

Air Canada's Preferred Economy seats offer up to 10 cm extra legroom for a fee.


Air Canada offers live TV on some North American flights, enhancing in-flight entertainment.

Read more about Air Canadaby Stefanie Waldek
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and Air Canada

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
Useful Info

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 Thursday and more expensive on a Sunday. 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 January, where tickets cost C$ 390 (return) on average. On the other hand, the most expensive months are November and April, where the average cost of round-trip tickets is C$ 839 and C$ 756 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$ 305, 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 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.


Good to know

Low seasonFebruary
High seasonJuly
Cheapest flightC$ 193
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly (1% 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 3 days, the lowest price for a flight from St. Louis to Toronto Pearson Intl Airport was C$ 141 for a one-way ticket and C$ 302 for a round-trip.

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

    All the following airlines offer inflight Wi-Fi service on the St. Louis to Toronto flight route: Air Canada, United Airlines, Lufthansa, American Airlines, Finnair, British Airways, and Iberia.

  • 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$ 574 or less round-trip.

Prefer to fly direct from St. Louis to Toronto?

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,United Airlines

Air Canada,United Airlines

Tuesday

Air Canada,United Airlines

Air Canada,United Airlines

Wednesday

Air Canada,United Airlines

Air Canada,United Airlines

Thursday

Air Canada,United Airlines

Air Canada,United Airlines

Friday

Air Canada,United Airlines

Air Canada,United Airlines

Saturday

Air Canada,United Airlines

Air Canada,United Airlines

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights

Direct returns

Toronto Pearson Intl to Lambert-St Louis

Monday

Air Canada,United Airlines

Air Canada,United Airlines

Tuesday

Air Canada,United Airlines

Air Canada,United Airlines

Wednesday

Air Canada,United Airlines

Air Canada,United Airlines

Thursday

Air Canada,United Airlines

Air Canada,United Airlines

Friday

Air Canada,United Airlines

Air Canada,United Airlines

Saturday

Air Canada,United Airlines

Air Canada,United Airlines

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights
See more nonstop flights

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 9531 reviews
6.3Food
7.0Comfort
6.8Entertainment
7.3Boarding
7.8Crew
Airline reviews

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

6.0 GoodAnonymous, Jun 2025CMH - YYZ
Read more Air Canada reviews

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

The staff made sure I was comfortable, moved me to a better seat with more leg room

Somehow, my booking was under my preferred name instead of my legal name so they almost didn’t let me board the plane at LAX. This problem should have been notified to me when I was still in Toronto.

When arriving over 2 hours early to check k in at Charlotte airport I was told I would have to check my carry on ? Apparently the flight was full and may not be room. I was not given a choice and the agent was quite unpleasant about it. I am a senior amd was not comfortable me having to worry about my bag being lost vut it didn’t seem to bother him. There were lots and lots of people of all ages in line when we boarded with carryons and most larger than mine .the rest of my journey was pleasant vut this was totally unacceptable.

The layover was 6 PLUS hours and we were only given a $15.00 voucher. We missed our first activity in Quebec due to the delay.

Miserable staff as it was a late/delayed flight and crew wasn’t in the best spirits. Completely understood as neither was most of the passengers. Still unacceptable l.

It was a short flight, and no entertainment. That was not a problem for us, but there is no option for "not applicable". There was a bit of turbulence, so there was no food service.

the fact air Canada changed my flight from 850 PM to 815 AM with zero regard to the plans i made that last day, the cost i lost out on as things were non refundable amd shortening my first vacation in 7 years sickened me. when we purchase a service thats whats we expect. when we want to change the service we have to pay for that option but you do whatever you want . i called accessibility dept as i have a cpap and an implanted loop recorder first person said no problem just let security know you cant go thru scanners. then i got an email saying i had to fill out a fit to fly form . which again there was NO need to have that none. But that cost me money and time to have a doctor fill it out. then when i went to check in online i was declined i had to see a person at the airport instead. i couldnt get my boarding pass like everyone elseso here I was contacting air canada so I would have a easy travel experience and it ended up being a nightmare with more work for me, more cost and time. the flight itself was great the nightmare around it i will never subject myself to again. i tried to stick with supporting Canada but Air Canada was not worth supporting. very disappointed especially with a dept that is supposed to help disabled people not make an already challenging event not worth going thru at all.

Most courteous, helpful employees and all flights were on time.

2.5 hour delay sitting in the plane on the tarmac, you tell me how the experience was

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

Information on your arrival and departure airports

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