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$168 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 3/25. 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.
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Search 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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Cheap Flight Deals from Pearson Intl to Lambert-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 Pearson Intl to Lambert-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.

Recent round-trip flight deals from Toronto to St. Louis

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Toronto to St. Louis.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
7:05 am - 2:42 pmYYZ-STL
8h 37m1 stop
6:26 pm - 5:55 amSTL-YYZ
10h 29m1 stop
$273
Find Deal
Tue, Feb 25 - Tue, Mar 4
7:05 am - 2:42 pmYYZ-STL
8h 37m1 stop
5:38 pm - 11:42 amSTL-YYZ
17h 04m1 stop
$300
Find Deal
Tue, Mar 4 - Thu, Mar 6
7:55 am - 4:49 pmYYZ-STL
9h 54m1 stop
6:06 am - 4:08 pmSTL-YYZ
9h 02m1 stop
$405Delta
Find Deal
Tue, Feb 25 - Tue, Mar 4
6:52 am - 2:36 pmYYZ-STL
8h 44m1 stop
3:32 pm - 11:59 pmSTL-YYZ
7h 27m1 stop
$439United Airlines
Find Deal
Wed, Feb 26 - Tue, Mar 4
7:55 am - 4:49 pmYYZ-STL
9h 54m1 stop
5:30 pm - 11:07 pmSTL-YYZ
4h 37m1 stop
$443Delta
Find Deal
Thu, Feb 20 - Sun, Feb 23
8:55 pm - 10:05 amYYZ-STL
14h 10m2 stops
1:05 pm - 9:25 pmSTL-YYZ
7h 20m1 stop
$464United Airlines
Find Deal
Tue, Mar 4 - Thu, Mar 6
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$480Air Canada
Find Deal
Thu, Feb 20 - Sun, Feb 23
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$487Air Canada
Find Deal
Mon, Mar 17 - Thu, Mar 20
10:55 am - 10:44 pmYYZ-STL
12h 49m1 stop
12:59 pm - 9:32 pmSTL-YYZ
7h 33m1 stop
$488American Airlines
Find Deal
Wed, Feb 19 - Thu, Feb 20
10:54 am - 8:09 pmYYZ-STL
10h 15m1 stop
6:00 am - 4:34 pmSTL-YYZ
9h 34m1 stop
$548American Airlines
Find Deal
Mon, Feb 10 - Wed, Feb 12

Flights from Toronto to St. Louis - Travel Insights & Trends

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 Thursday, 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 Monday and avoiding Sundays 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 $436 (return) on average. On the other hand, the most expensive months are September and December, where the average cost of round-trip tickets is $577 and $557 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 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low season

September

High season

December

Cheapest flight

$168
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly with an average 12% increase in price.
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 $168 for a one-way ticket and $273 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?

    Air Canada, and United Airlines offer 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.

  • 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.

See more FAQs

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 $469 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 airline 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.
7.0
Air CanadaOverall score based on 8637 reviews
7.0Comfort
7.3Boarding
7.8Crew
6.8Entertainment
6.2Food
Airline reviews

Delay after delay.......they are awful Delayed because of cold wx really!!!!! We live in Canada

2.0 MediocreAnonymous, Jan 2025YYZ - MSP
Read more Air Canada reviews

Delay after delay.......they are awful Delayed because of cold wx really!!!!! We live in Canada

So we didn't actually go. We were hoping to go for the Inauguration of the first female president. When That Guy got elected, we bailed. Unfortunately, we got basically none of our money back, despite having travel insurance. Would not fly with Air Canada again unless I had to.

flight was delayed, there was open communication about the delay the delay pushed way past the posted delay time and

This was my first time flying on Air Canada and the experience was good and pleasant enough, great crew members and the price I paid was amazing,

This was my first time and the experience was good and pleasant enough, great crew members and the price I paid was amazing,

I was overcharged either by United or sister airline Air Canada. It's exhausting dealing with companies nowadays that irresponsibly abuse access to credit/debit cards.

Air Canada is not only the worst airline in the business but the worst business in history.

I overpaid for the trip. They would not consider giving me any compensation or a credit.

Service was excellent, but they ran out of food options by the time they got to my seat (row 36).

The idea of needing to go outside in the winter to board in icy cold temperatures is totally a non starter for me. Seats were very uncomfortable though the leg room not too terrible. Attendants were nice

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

Information on your arrival and departure airports

St. Louis (STL)
Toronto (YYZ)

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