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Cheap flights from St. Louis to Toronto from $131

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Toronto departing on 2/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:51 pm - 2:20 pm
STL
-
YYZ
20h 29m
1 stop
Multiple Airlines Logo
10:15 pm - 12:15 pm
YYZ
-
STL
39h 00m
2 stops
$333Multiple Airlines
Mon, Mar 9 - Sun, Mar 15
Multiple Airlines Logo
8:10 pm - 2:20 pm
STL
-
YYZ
17h 10m
1 stop
Multiple Airlines Logo
3:40 pm - 10:32 am
YYZ
-
STL
19h 52m
2 stops
$344Multiple Airlines
Mon, Mar 16 - Mon, Mar 23
Multiple Airlines Logo
8:10 pm - 2:20 pm
STL
-
YYZ
17h 10m
1 stop
Multiple Airlines Logo
8:20 pm - 11:19 pm
YYZ
-
STL
27h 59m
1 stop
$352Multiple Airlines
Mon, Mar 16 - Mon, Mar 23
American Airlines Logo
5:46 am - 5:43 pm
STL
-
YYZ
10h 57m
1 stop
American Airlines Logo
3:13 pm - 11:46 pm
YYZ
-
STL
9h 33m
1 stop
$361American Airlines
Wed, Apr 15 - Sat, Apr 18
Multiple Airlines Logo
8:06 pm - 12:26 am
STL
-
YYZ
27h 20m
2 stops
Multiple Airlines Logo
7:15 am - 11:19 pm
YYZ
-
STL
17h 04m
1 stop
$370Multiple Airlines
Tue, Mar 17 - Tue, Mar 24
Multiple Airlines Logo
4:51 pm - 2:20 pm
STL
-
YYZ
20h 29m
1 stop
Multiple Airlines Logo
7:15 am - 11:19 pm
YYZ
-
STL
17h 04m
2 stops
$380Multiple Airlines
Mon, Mar 9 - Fri, Mar 13
Multiple Airlines Logo
12:14 pm - 6:43 am
STL
-
YYZ
17h 29m
1 stop
Multiple Airlines Logo
3:40 pm - 10:30 am
YYZ
-
STL
19h 50m
2 stops
$392Multiple Airlines
Mon, Mar 30 - Wed, Apr 1
Multiple Airlines Logo
8:12 pm - 1:20 pm
STL
-
YYZ
40h 08m
2 stops
Multiple Airlines Logo
7:10 am - 11:19 pm
YYZ
-
STL
17h 09m
1 stop
$396Multiple Airlines
Sat, Mar 7 - Tue, Mar 17
Multiple Airlines Logo
7:52 am - 2:20 pm
STL
-
YYZ
29h 28m
1 stop
Multiple Airlines Logo
10:15 pm - 12:15 pm
YYZ
-
STL
39h 00m
2 stops
$399Multiple Airlines
Sun, Mar 8 - Sun, Mar 15
American Airlines Logo
7:05 am - 5:44 pm
STL
-
YYZ
9h 39m
1 stop
American Airlines Logo
11:44 am - 11:48 pm
YYZ
-
STL
13h 04m
1 stop
$401American Airlines
Mon, Apr 20 - Wed, Apr 22

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

Our best American Airlines deals on St. Louis to Toronto Pearson Intl Airport flight tickets
American Airlines
Apr 15
STL5:46 amLambert-St Louis
10h 57m
1 stop
YYZ5:43 pmToronto Pearson Intl
Apr 18
YYZ3:13 pmToronto Pearson Intl
9h 33m
1 stop
STL11:46 pmLambert-St Louis
$361
American Airlines
Apr 20
STL7:05 amLambert-St Louis
9h 39m
1 stop
YYZ5:44 pmToronto Pearson Intl
Apr 22
YYZ11:44 amToronto Pearson Intl
13h 04m
1 stop
STL11:48 pmLambert-St Louis
$401
American Airlines
Mar 7
STL8:00 amLambert-St Louis
12h 29m
1 stop
YYZ9:29 pmToronto Pearson Intl
Mar 16
YYZ4:44 pmToronto Pearson Intl
8h 00m
1 stop
STL11:44 pmLambert-St Louis
$425

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

Our best United Airlines deals on St. Louis to Toronto Pearson Intl Airport flight tickets
United Airlines
Feb 14
STL4:05 pmLambert-St Louis
2h 01m
YYZ7:06 pmToronto Pearson Intl
Feb 21
YYZ8:45 amToronto Pearson Intl
8h 17m
1 stop
STL4:02 pmLambert-St Louis
$502
United Airlines
Feb 14
STL4:05 pmLambert-St Louis
2h 01m
YYZ7:06 pmToronto Pearson Intl
Feb 21
YYZ12:05 pmToronto Pearson Intl
10h 00m
1 stop
STL9:05 pmLambert-St Louis
$541
United Airlines
May 3
STL7:45 amLambert-St Louis
8h 15m
1 stop
YYZ5:00 pmToronto Pearson Intl
May 8
YYZ9:00 pmToronto Pearson Intl
25h 08m
1 stop
STL9:08 pmLambert-St Louis
$549

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Toronto Pearson Intl Airport 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 February 2, 2026.
Use the filters below to find and compare flights from St. Louis to Toronto Pearson Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 3/9

4:51 pm-2:20 pm

1 stop20h 29m

Toronto Pearson Intl

Sun 3/15

10:15 pm-12:15 pm

2 stops39h 00m

$333

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 3/16

8:10 pm-2:20 pm

1 stop17h 10m

Toronto Pearson Intl

Mon 3/23

3:40 pm-10:32 am

2 stops19h 52m

$344

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 3/16

8:10 pm-2:20 pm

1 stop17h 10m

Toronto Pearson Intl

Mon 3/23

8:20 pm-11:19 pm

1 stop27h 59m

$352

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 4/15

5:46 am-5:43 pm

1 stop10h 57m

Toronto Pearson Intl

Sat 4/18

3:13 pm-11:46 pm

1 stop9h 33m

$361

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 3/17

8:06 pm-12:26 am

2 stops27h 20m

Toronto Pearson Intl

Tue 3/24

7:15 am-11:19 pm

1 stop17h 04m

$370

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 3/9

4:51 pm-2:20 pm

1 stop20h 29m

Toronto Pearson Intl

Fri 3/13

7:15 am-11:19 pm

2 stops17h 04m

$380

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 3/30

12:14 pm-6:43 am

1 stop17h 29m

Toronto Pearson Intl

Wed 4/1

3:40 pm-10:30 am

2 stops19h 50m

$392

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 3/7

8:12 pm-1:20 pm

2 stops40h 08m

Toronto Pearson Intl

Tue 3/17

7:10 am-11:19 pm

1 stop17h 09m

$396

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 3/8

7:52 am-2:20 pm

1 stop29h 28m

Toronto Pearson Intl

Sun 3/15

10:15 pm-12:15 pm

2 stops39h 00m

$399

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 4/20

7:05 am-5:44 pm

1 stop9h 39m

Toronto Pearson Intl

Wed 4/22

11:44 am-11:48 pm

1 stop13h 04m

$401

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 Toronto from

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

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 St. Louis and Toronto Pearson Intl Airport?

What is the cheapest month to fly to Toronto Pearson Intl Airport?

The cheapest month to fly to Toronto Pearson Intl Airport from St. Louis is in May. Flight prices, which tend to average around $420, are often lower during this time because this is during the off-season. If you don’t want to visit Toronto Pearson Intl Airport in May, then you should wait until July to fly from St. Louis, when ticket prices are also cheap, with an average price of $435.

What is the cheapest day to depart on your flight to Toronto Pearson Intl Airport?

The cheapest day to depart from St. Louis to Toronto Pearson Intl Airport is on a Tuesday when prices can be found for as low as $802. The most expensive day to fly to Toronto Pearson Intl Airport is Friday, with ticket prices averaging around $964.

What is the cheapest time of day to depart on your flight to Toronto Pearson Intl Airport?

Flying to Toronto Pearson Intl Airport from St. Louis in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $858 when looking at flights departing in the afternoon. Flights at noon are often more expensive with an average ticket price of $1,088.

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

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

How far in advance should I book a flight to Toronto Pearson Intl Airport?

You are more likely to see cheaper flights to Toronto Pearson Intl Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Toronto Pearson Intl Airport for around $532 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Toronto Pearson Intl Airport from St. Louis for as low as $221 on momondo.

What cabin class options are available on Lambert-St Louis to Toronto Pearson Intl flights?

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

Can stopping save me money on St. Louis to Toronto Pearson Intl Airport flights?

You could potentially save up to 28% on your flight if you consider stops on a St. Louis to Toronto Pearson Intl Airport flight.

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

As of February 2026, prices for St. Louis to Toronto Pearson Intl Airport flights are approximately 175% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$312

Fastest flight time

1h 51m

Direct flights

Every day
The best one-way flight to Toronto Pearson Intl Airport from St. Louis in the past 72 hours is $312. The best round-trip flight deal from St. Louis to Toronto Pearson Intl Airport found on momondo in the last 72 hours is $645.
The fastest flight from St. Louis to Toronto Pearson Intl Airport takes 1h 51m
Direct flights go from St. Louis to Toronto Pearson Intl Airport every day.
Search flight deals

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

    A flight from Lambert-St Louis to Toronto Pearson Intl will travel around 650.6 mi. In terms of flight time, this usually takes a little over 1h 51m.

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

    Prices for flights from Lambert-St Louis Airport to Toronto Pearson Intl Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Toronto Pearson Intl Airport.

  • What documentation or ID do you need to fly to Toronto Pearson Intl Airport?

    The required travel and health documents for your Toronto Pearson Intl 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 Toronto Pearson Intl 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 St. Louis to Toronto Pearson Intl Airport?

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

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

Compare and see reviews for airlines that fly from St. Louis to Toronto Pearson Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $199Free CancellationRating
7.4
9,229 reviews
Search United Airlines flights
Air CanadaPriceFrom $214Free CancellationRating
7.1
10,676 reviews
Search Air Canada flights
American AirlinesPriceFrom $270Free CancellationRating
7.2
11,212 reviews
Search American Airlines flights

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

    United Airlines operates around 6 flights from St. Louis to Toronto Pearson Intl Airport every week. The average price of these flights found in the last 72 hours has been $397, but momondo users have found United Airlines deals from St. Louis to Toronto Pearson Intl Airport from as low as $199 round-trip. United Airlines has been scored 7.4/10 in 9,220 reviews.

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

    Air Canada (7.1/10 from 10,668 reviews) operates around 6 flights from St. Louis to Toronto Pearson Intl Airport in any given week. The average Air Canada airfare for this route is around $504, with deals from around $214 rare but found on momondo. Referenced prices are for round-trip St. Louis to Toronto Pearson Intl Airport flight searches in the last 72 hours.

Traveling to a place near Toronto?

Book flights to Toronto if you plan to visit one of these locations
Niagara Falls
Mississauga
Niagara-on-the-Lake
Brampton
Markham
Vaughan
Richmond Hill
Oakville
Kitchener
Barrie
St. Catharines
Cambridge
Collingwood
Peterborough
Guelph
Burlington
Whitby
Oshawa
Orillia
Stratford

Why use momondo?

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

Finding the right flight to Toronto from St. Louis 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 Toronto quick and easy, saving you time and money.

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

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

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Toronto from St. Louis.

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

If you are simply researching potential flights to Toronto, momondo offers a useful price alert feature which will track prices for flights to Toronto from St. Louis and alert you when they change.

An easier way to manage your Toronto Pearson Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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