YYZ - STL

$160 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 7/15. 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 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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Flights Deals
Expert advice
Useful Info
Flights 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, Jun 26 - Sun, Jun 29
Air Canada Logo
11:30 am - 12:36 pmYYZ-STL
2h 06mnonstop
Air Canada Logo
7:30 am - 10:25 amSTL-YYZ
1h 55mnonstop
$304Air Canada
Find Deal
Thu, Jun 26 - Sun, Jun 29
Air Canada Logo
11:30 am - 12:36 pmYYZ-STL
2h 06mnonstop
Air Canada Logo
1:30 pm - 9:44 pmSTL-YYZ
7h 14m1 stop
$305Air Canada
Find Deal
Thu, Jun 26 - Sun, Jun 29
Delta Logo
10:20 am - 3:17 pmYYZ-STL
5h 57m1 stop
Delta Logo
6:40 am - 11:18 amSTL-YYZ
3h 38m1 stop
$330Delta
Find Deal
Mon, Jun 23 - Thu, Jun 26
American Airlines Logo
7:25 pm - 11:59 pmYYZ-STL
5h 34m1 stop
American Airlines Logo
6:00 am - 10:59 amSTL-YYZ
3h 59m1 stop
$339American Airlines
Find Deal
Sat, Jul 26 - Sun, Jul 27
 Logo
6:30 am - 2:39 pmYYZ-STL
9h 09m1 stop
 Logo
10:47 am - 2:29 pmSTL-YYZ
26h 42m2 stops
Wed, Aug 6 - Wed, Aug 20
American Airlines Logo
6:30 am - 1:12 pmYYZ-STL
7h 42m1 stop
American Airlines Logo
1:42 pm - 11:29 pmSTL-YYZ
8h 47m1 stop
$353American Airlines
Find Deal
Thu, Jun 26 - Sun, Jun 29
Delta Logo
10:20 am - 3:17 pmYYZ-STL
5h 57m1 stop
Delta Logo
6:40 am - 11:18 amSTL-YYZ
3h 38m1 stop
$361Delta
Find Deal
Thu, Jun 26 - Sun, Jun 29
United Airlines Logo
11:30 am - 12:36 pmYYZ-STL
2h 06mnonstop
United Airlines Logo
7:30 am - 10:25 amSTL-YYZ
1h 55mnonstop
$364United Airlines
Find Deal
Tue, Jul 22 - Thu, Jul 24
 Logo
6:30 am - 10:29 amYYZ-STL
28h 59m2 stops
 Logo
10:47 am - 9:23 pmSTL-YYZ
33h 36m2 stops
Thu, Jun 26 - Sun, Jun 29
United Airlines Logo
11:30 am - 12:36 pmYYZ-STL
2h 06mnonstop
United Airlines Logo
7:30 am - 10:25 amSTL-YYZ
1h 55mnonstop
$379United Airlines
Find Deal
Expert advice

Expert advice for your flight from Toronto to St. Louis

 
Snippets provided in this section are AI-generated based on a summarization 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
Air Canada

Air Canada's Business Class offers spacious recliners with plenty of legroom in a 2-2 configuration.


Preferred Economy seats offer up to four extra inches of legroom for an additional fee.

Read more about Air Canadaby Stefanie Waldek
United Airlines

United's Economy Plus offers up to six inches more legroom than standard economy seats.


Purchase Priority Boarding to ensure overhead bin space and avoid gate-checking your carry-on.

Airports
YYZ

Toronto Pearson offers preclearance for U.S.-bound flights, allowing you to skip customs upon arrival in the U.S.

Read more about YYZby Stefanie Waldek
STL

Use MetroLink for easy access from STL to downtown St. Louis, avoiding rush hour traffic.

Read more about STLby Yulia Denisyuk
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada, United Airlines and YYZ

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
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia Denisyuk

Yulia Denisyuk

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Read more
Useful Info

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.

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.

If your flying dates are flexible, you should consider flying to St. Louis on a Saturday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Toronto to St. Louis. For your return ticket, we recommend flying on a Thursday and avoiding Fridays for the best deals.

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 May, where tickets cost $401 (return) on average. On the other hand, the most expensive months are December and September, where the average cost of round-trip tickets is $552 and $545 respectively.

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. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonSeptember
High seasonMay
Cheapest flight$160
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly and prices are also 18% 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 $160 for a one-way ticket and $304 for a round-trip.

  • Do I need a passport to fly between Toronto and St. Louis?

    A passport is required to fly from Toronto to St. Louis.

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

    Only Air Canada offers inflight Wi-Fi service on the Toronto to St. Louis flight route.

  • Which aircraft models fly most regularly from Toronto to St. Louis?

    The Canadair (Bombardier) Regional Jet 900 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?

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

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

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

  • Which is the best airline for flights from Toronto to St. Louis, United Airlines or Air Canada?

    The two airlines most popular with KAYAK users for flights from Toronto to St. Louis are United Airlines and Air Canada. With an average price for the route of $499 and an overall rating of 7.4, United Airlines is the most popular choice. Air Canada is also a great choice for the route, with an average price of $476 and an overall rating of 7.1.

  • 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 travelers 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. Booking your flights between Toronto and STL can sometimes prove cheaper using this method.

  • 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 $188 or less one-way and $324 or less round-trip.

Prefer to fly direct from Toronto to 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, 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 direct flights

Direct returns

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 direct flights
See more direct flights

Top 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.
7.4
United AirlinesOverall score based on 8790 reviews
6.6Food
7.0Entertainment
7.7Boarding
7.3Comfort
8.1Crew
Airline reviews

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

10.0 ExcellentAnonymous, May 2025YVR - SFO
Read more United Airlines reviews

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

Very nice and clean plane. Transit time between flights was tight though

Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy

So far so good but food and entertainment are not available for this flight

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Michael, our FA was very attentive, even finding me a chocolate brownie from economy class when the dessert selections were all dairy based. ( intolerant, not allergic so don’t usually need to order dairy free)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

headphone jack didnt work for the first flight and not much variety

Plane 3 hours late. Missed connection. No help from gate staff. App horrible. Lost connection repeatedly. No service desk. Finally got help from young girl driving cart.

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

The ground staff was so rude in Toronto airport ...very rude and did not answer simple questions, and made me look like a fool. Very rude ground staff.

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

I had a nice flight with free wifi. So I was able to message family members and stream music during my flight, which made the trip go by fast. I also enjoyed flying on there Airbus A220. The plane looked very new and it also got up to speed fast down the runway and didn't need much runway to get airborne.

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

All was fine. Weather was a bit stormy, but nothing kayak can do about that! 😊

I paid for a comfort class seat and was seated in economy.

My plane was cancelled and had to be rebook for the evening was not happy.

The flight was cancelled and we had to rebook on Porter to make our cruise the next day. Air Canada has not compensated. We won’t be flying with them again. This is the second time this has happened. Also the return flight was delayed 2 hours who knows why.

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

Information on your arrival and departure airports

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