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Cheap flights from Toronto Pearson Intl Airport to St. Louis from $166

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Toronto Pearson Intl Airport to St. Louis departing on 9/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Toronto Pearson Intl Airport to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:20 am - 4:20 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
10h 00m1 stop Chicago O'Hare Intl
American Airlines Logo
7:21 am - 6:35 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
10h 14m1 stop Chicago O'Hare Intl
$344American Airlines
Tue, Sep 8 - Fri, Sep 11
Multiple Airlines Logo
7:45 am - 9:40 amYYZ  Toronto Pearson Intl-STL Lambert-St Louis
26h 55m2 stops Orlando Atlanta Hartsfield-Jackson
Multiple Airlines Logo
8:34 pm - 1:40 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
16h 06m1 stop Orlando
$347Multiple Airlines
Wed, Oct 21 - Sun, Oct 25
American Airlines Logo
11:39 am - 8:44 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
10h 05m1 stop Chicago O'Hare Intl
American Airlines Logo
5:00 am - 2:32 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
8h 32m1 stop Chicago O'Hare Intl
$362American Airlines
Wed, Sep 9 - Thu, Sep 10
Multiple Airlines Logo
6:30 am - 7:39 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
14h 09m1 stop Orlando
Multiple Airlines Logo
10:35 am - 12:10 amSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
12h 35m2 stops Atlanta Hartsfield-Jackson Orlando
$377Multiple Airlines
Fri, Nov 6 - Tue, Nov 10
Air Canada Logo
12:55 pm - 2:00 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
2h 05mnonstop
Air Canada Logo
4:05 pm - 7:05 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
2h 00mnonstop
$448Air Canada
Tue, Oct 20 - Tue, Oct 27
Air Canada Logo
12:55 pm - 2:02 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
2h 07mnonstop
Air Canada Logo
8:55 am - 11:49 amSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
1h 54mnonstop
$448Air Canada
Thu, Sep 3 - Tue, Sep 8
Air Canada Logo
6:55 pm - 8:00 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
2h 05mnonstop
Air Canada Logo
2:40 pm - 5:34 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
1h 54mnonstop
$448Air Canada
Wed, Oct 7 - Wed, Oct 14
United Airlines Logo
2:00 pm - 10:00 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
9h 00m1 stop Chicago O'Hare Intl
United Airlines Logo
8:00 am - 6:31 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
9h 31m1 stop Chicago O'Hare Intl
$507United Airlines
Tue, Sep 22 - Sat, Sep 26
United Airlines Logo
12:25 pm - 10:00 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
10h 35m1 stop Chicago O'Hare Intl
United Airlines Logo
8:00 am - 5:01 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
8h 01m1 stop Chicago O'Hare Intl
$508United Airlines
Tue, Sep 22 - Sat, Sep 26
United Airlines Logo
11:00 am - 2:17 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
4h 17m1 stop Chicago O'Hare Intl
United Airlines Logo
5:36 pm - 11:59 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
5h 23m1 stop Chicago O'Hare Intl
$550United Airlines
Fri, Oct 2 - Fri, Oct 2

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American Airlines flights from Toronto Pearson Intl Airport to St. Louis

Our best American Airlines deals on Toronto Pearson Intl Airport to St. Louis flight tickets
American Airlines
Sep 8
YYZ7:20 amToronto Pearson Intl
10h 00m
1 stop
STL4:20 pmLambert-St Louis
Sep 11
STL7:21 amLambert-St Louis
10h 14m
1 stop
YYZ6:35 pmToronto Pearson Intl
$344
American Airlines
Sep 9
YYZ11:39 amToronto Pearson Intl
10h 05m
1 stop
STL8:44 pmLambert-St Louis
Sep 10
STL5:00 amLambert-St Louis
8h 32m
1 stop
YYZ2:32 pmToronto Pearson Intl
$362
American Airlines
Sep 8
YYZ7:20 amToronto Pearson Intl
10h 00m
1 stop
STL4:20 pmLambert-St Louis
Sep 11
STL7:21 amLambert-St Louis
10h 14m
1 stop
YYZ6:35 pmToronto Pearson Intl
$381

Air Canada flights from Toronto Pearson Intl Airport to St. Louis

Our best Air Canada deals on Toronto Pearson Intl Airport to St. Louis flight tickets
Air Canada
Oct 7
YYZ6:55 pmToronto Pearson Intl
2h 05m
STL8:00 pmLambert-St Louis
Oct 11
STL8:55 amLambert-St Louis
1h 54m
YYZ11:49 amToronto Pearson Intl
$448
Air Canada
Sep 9
YYZ12:55 pmToronto Pearson Intl
2h 05m
STL2:00 pmLambert-St Louis
Sep 10
STL8:55 amLambert-St Louis
1h 54m
YYZ11:49 amToronto Pearson Intl
$450
Air Canada
Sep 8
YYZ7:15 pmToronto Pearson Intl
2h 05m
STL8:20 pmLambert-St Louis
Sep 11
STL8:55 amLambert-St Louis
1h 54m
YYZ11:49 amToronto Pearson Intl
$451

momondo Fare Finder

 
Customize your flight search to find flights from Toronto Pearson Intl Airport to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 11, 2026.
Use the filters below to find and compare flights from Toronto Pearson Intl Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Tue 9/8

7:20 am-4:20 pm

1 stop10h 00m

Lambert-St Louis

Fri 9/11

7:21 am-6:35 pm

1 stop10h 14m

$344

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Wed 10/21

7:45 am-9:40 am

2 stops26h 55m

Lambert-St Louis

Sun 10/25

8:34 pm-1:40 pm

1 stop16h 06m

$347

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Wed 9/9

11:39 am-8:44 pm

1 stop10h 05m

Lambert-St Louis

Thu 9/10

5:00 am-2:32 pm

1 stop8h 32m

$362

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Fri 11/6

6:30 am-7:39 pm

1 stop14h 09m

Lambert-St Louis

Tue 11/10

10:35 am-12:10 am

2 stops12h 35m

$377

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Tue 10/20

12:55 pm-2:00 pm

Nonstop2h 05m

Lambert-St Louis

Tue 10/27

4:05 pm-7:05 pm

Nonstop2h 00m

$448

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Thu 9/3

12:55 pm-2:02 pm

Nonstop2h 07m

Lambert-St Louis

Tue 9/8

8:55 am-11:49 am

Nonstop1h 54m

$448
Quickest round-trip

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Wed 10/7

6:55 pm-8:00 pm

Nonstop2h 05m

Lambert-St Louis

Wed 10/14

2:40 pm-5:34 pm

Nonstop1h 54m

$448

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Tue 9/22

2:00 pm-10:00 pm

1 stop9h 00m

Lambert-St Louis

Sat 9/26

8:00 am-6:31 pm

1 stop9h 31m

$507

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Tue 9/22

12:25 pm-10:00 pm

1 stop10h 35m

Lambert-St Louis

Sat 9/26

8:00 am-5:01 pm

1 stop8h 01m

$508

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Fri 10/2

11:00 am-2:17 pm

1 stop4h 17m

Lambert-St Louis

Fri 10/2

5:36 pm-11:59 pm

1 stop5h 23m

$550

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Toronto Pearson Intl Airport to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Toronto Pearson Intl Airport and St. Louis?

Prices are currently low for flights on this route.

Typical prices usually range from $449 to $634.
The lowest price recently found on this route was $344.

What is the cheapest month to fly to St. Louis?

In general, January is the cheapest month to fly from Toronto Pearson Intl Airport to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $422. The month of February is another great option to travel to St. Louis, with average flight prices from Toronto Pearson Intl Airport averaging around $427.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Sunday when prices can be found for as low as $394. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $548. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Toronto Pearson Intl Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $418 when looking at flights departing at noon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $584 per ticket.

What is the cheapest Toronto Pearson Intl to Lambert-St Louis flight route?

Fly from Toronto Pearson Intl to Lambert-St Louis for the best Toronto Pearson Intl - Lambert-St Louis flight prices

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

You are more likely to see cheaper flights to St. Louis from Toronto Pearson Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $511 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Toronto Pearson Intl Airport for as low as $359 on momondo.

What cabin class options are available on Toronto Pearson Intl Airport to St. Louis flights?

There are 4 cabin classes available to choose from on Toronto Pearson Intl Airport to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Toronto Pearson Intl Airport to St. Louis flight prices changed over time?

As of August 2026, prices for Toronto Pearson Intl Airport to St. Louis flights are approximately 40% more expensive when compared to flights at the same time last year.

When to book flights from Toronto Pearson Intl Airport to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Toronto Pearson Intl Airport to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Toronto Pearson Intl Airport to St. Louis (YYZ to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Toronto Pearson Intl Airport to St. Louis

Fastest flight time

2h 05m

Direct flights

Every day

Airports in St. Louis

1 airport
The fastest flight from Toronto Pearson Intl Airport to St. Louis takes 2h 05m
Direct flights go from Toronto Pearson Intl Airport to St. Louis every day.
There is 1 airport in St. Louis. From Toronto Pearson Intl Airport there are direct flights to Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Toronto Pearson Intl Airport to St. Louis

  • How far is Toronto Pearson Intl to Lambert-St Louis by plane?

    Lambert-St Louis is 650.6 mi away from Toronto Pearson Intl. 2h 05m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Toronto Pearson Intl Airport to Lambert-St Louis Airport?

    Prices for flights from Toronto Pearson Intl Airport to Lambert-St Louis Airport were last updated today.

  • How many operators does momondo search for flights from Toronto Pearson Intl Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Toronto Pearson Intl Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Toronto Pearson Intl Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Toronto Pearson Intl Airport to St. Louis?

  • What is the most popular airline from Toronto Pearson Intl Airport to St. Louis?

Best airlines flying from Toronto Pearson Intl Airport to St. Louis

Compare and see reviews for airlines that fly from Toronto Pearson Intl Airport to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $226Free CancellationRating
7.4
10,104 reviews
Search United Airlines flights
Air CanadaPriceFrom $256Free CancellationRating
7.1
11,462 reviews
Search Air Canada flights

  • United Airlines Flights From Toronto Pearson Intl Airport to St. Louis

    United Airlines operates around 14 flights from Toronto Pearson Intl Airport to St. Louis every week. The average price of these flights found in the last 72 hours has been $549, but momondo users have found United Airlines deals from Toronto Pearson Intl Airport to St. Louis from as low as $226 round-trip. United Airlines has been scored 7.4/10 in 10,104 reviews.

  • Air Canada Flights From Toronto Pearson Intl Airport to St. Louis

    Air Canada (7.1/10 from 11,462 reviews) operates around 14 flights from Toronto Pearson Intl Airport to St. Louis in any given week. The average Air Canada airfare for this route is around $512, with deals from around $256 rare but found on momondo. Referenced prices are for round-trip Toronto Pearson Intl Airport to St. Louis flight searches in the last 72 hours.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
St. Peters
Maryland Heights
Collinsville
Florissant
Alton
O'Fallon
Farmington
Clayton
Fenton
Festus
Wentzville
Eureka
Edwardsville
Litchfield
Grafton
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Toronto to St. Louis?

Finding the right flight to St. Louis from Toronto is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

Can I find flights from Toronto to St. Louis with flexible booking policies on momondo?

All flight searches from Toronto to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Toronto to St. Louis?

Once you have performed a search for Toronto to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Toronto to St. Louis right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to St. Louis from Toronto. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your St. Louis trip

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