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Cheap flights from St. Louis to Toronto from $137

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 5/19. 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.
American Airlines Logo
6:00 am - 2:30 pm
STL
-
YYZ
7h 30m
1 stop
American Airlines Logo
1:15 pm - 11:54 pm
YYZ
-
STL
11h 39m
1 stop
$333American Airlines
Wed, Jun 17 - Wed, Jun 24
American Airlines Logo
12:27 pm - 11:29 pm
STL
-
YYZ
10h 02m
1 stop
American Airlines Logo
1:15 pm - 10:19 pm
YYZ
-
STL
10h 04m
1 stop
$348American Airlines
Tue, Apr 28 - Tue, May 5
Multiple Airlines Logo
4:59 pm - 2:08 pm
STL
-
YYZ
20h 09m
1 stop
Multiple Airlines Logo
8:10 am - 5:36 pm
YYZ
-
STL
34h 26m
2 stops
$372Multiple Airlines
Mon, Apr 20 - Mon, May 4
Multiple Airlines Logo
6:55 pm - 8:55 pm
STL
-
YYZ
25h 00m
2 stops
Multiple Airlines Logo
7:45 am - 12:21 am
YYZ
-
STL
17h 36m
1 stop
$382Multiple Airlines
Thu, May 14 - Thu, May 21
Multiple Airlines Logo
4:59 pm - 2:16 pm
STL
-
YYZ
20h 17m
1 stop
Multiple Airlines Logo
11:15 am - 11:19 pm
YYZ
-
STL
37h 04m
2 stops
$388Multiple Airlines
Wed, Apr 15 - Mon, Apr 20
Multiple Airlines Logo
4:59 pm - 2:08 pm
STL
-
YYZ
20h 09m
1 stop
Multiple Airlines Logo
11:15 am - 10:30 am
YYZ
-
STL
24h 15m
2 stops
$392Multiple Airlines
Mon, Apr 20 - Wed, Apr 22
Multiple Airlines Logo
5:27 pm - 8:55 pm
STL
-
YYZ
26h 28m
2 stops
Multiple Airlines Logo
9:45 am - 6:06 pm
YYZ
-
STL
33h 21m
1 stop
$403Multiple Airlines
Wed, May 13 - Tue, May 19
American Airlines Logo
12:27 pm - 11:29 pm
STL
-
YYZ
10h 02m
1 stop
American Airlines Logo
11:33 am - 11:56 pm
YYZ
-
STL
13h 23m
1 stop
$407American Airlines
Sat, May 16 - Mon, May 18
American Airlines Logo
5:51 am - 5:43 pm
STL
-
YYZ
10h 52m
1 stop
American Airlines Logo
11:33 am - 10:19 pm
YYZ
-
STL
11h 46m
1 stop
$412American Airlines
Thu, Apr 30 - Thu, May 7
Multiple Airlines Logo
4:19 pm - 2:30 pm
STL
-
YYZ
21h 11m
1 stop
Multiple Airlines Logo
4:45 pm - 6:36 pm
YYZ
-
STL
26h 51m
2 stops
$414Multiple Airlines
Wed, Jun 3 - Sun, Jun 14

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

Our best Air Canada deals on St. Louis to Toronto Pearson Intl Airport flight tickets
Air Canada
May 7
STL7:05 amLambert-St Louis
1h 51m
YYZ9:56 amToronto Pearson Intl
May 10
YYZ11:00 amToronto Pearson Intl
2h 06m
STL12:06 pmLambert-St Louis
$479
Air Canada
May 7
STL7:05 amLambert-St Louis
1h 51m
YYZ9:56 amToronto Pearson Intl
May 10
YYZ7:00 pmToronto Pearson Intl
2h 09m
STL8:09 pmLambert-St Louis
$481
Air Canada
May 7
STL1:05 pmLambert-St Louis
5h 53m
1 stop
YYZ7:58 pmToronto Pearson Intl
May 10
YYZ7:00 pmToronto Pearson Intl
2h 09m
STL8:09 pmLambert-St Louis
$485

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
Jun 17
STL6:00 amLambert-St Louis
7h 30m
1 stop
YYZ2:30 pmToronto Pearson Intl
Jun 24
YYZ1:15 pmToronto Pearson Intl
11h 39m
1 stop
STL11:54 pmLambert-St Louis
$333
American Airlines
Apr 28
STL12:27 pmLambert-St Louis
10h 02m
1 stop
YYZ11:29 pmToronto Pearson Intl
May 5
YYZ1:15 pmToronto Pearson Intl
10h 04m
1 stop
STL10:19 pmLambert-St Louis
$348
American Airlines
May 16
STL12:27 pmLambert-St Louis
10h 02m
1 stop
YYZ11:29 pmToronto Pearson Intl
May 18
YYZ11:33 amToronto Pearson Intl
13h 23m
1 stop
STL11:56 pmLambert-St Louis
$407

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 April 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

Cheapest round-trip
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 6/17

6:00 am-2:30 pm

1 stop7h 30m

Toronto Pearson Intl

Wed 6/24

1:15 pm-11:54 pm

1 stop11h 39m

$333

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 4/28

12:27 pm-11:29 pm

1 stop10h 02m

Toronto Pearson Intl

Tue 5/5

1:15 pm-10:19 pm

1 stop10h 04m

$348

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 4/20

4:59 pm-2:08 pm

1 stop20h 09m

Toronto Pearson Intl

Mon 5/4

8:10 am-5:36 pm

2 stops34h 26m

$372

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/14

6:55 pm-8:55 pm

2 stops25h 00m

Toronto Pearson Intl

Thu 5/21

7:45 am-12:21 am

1 stop17h 36m

$382

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 4/15

4:59 pm-2:16 pm

1 stop20h 17m

Toronto Pearson Intl

Mon 4/20

11:15 am-11:19 pm

2 stops37h 04m

$388

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 4/20

4:59 pm-2:08 pm

1 stop20h 09m

Toronto Pearson Intl

Wed 4/22

11:15 am-10:30 am

2 stops24h 15m

$392

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 5/13

5:27 pm-8:55 pm

2 stops26h 28m

Toronto Pearson Intl

Tue 5/19

9:45 am-6:06 pm

1 stop33h 21m

$403

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 5/16

12:27 pm-11:29 pm

1 stop10h 02m

Toronto Pearson Intl

Mon 5/18

11:33 am-11:56 pm

1 stop13h 23m

$407

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 4/30

5:51 am-5:43 pm

1 stop10h 52m

Toronto Pearson Intl

Thu 5/7

11:33 am-10:19 pm

1 stop11h 46m

$412

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 6/3

4:19 pm-2:30 pm

1 stop21h 11m

Toronto Pearson Intl

Sun 6/14

4:45 pm-6:36 pm

2 stops26h 51m

$414

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 March. Flight prices, which tend to average around $310, 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 March, then you should wait until May to fly from St. Louis, when ticket prices are also cheap, with an average price of $420.

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 $815. The most expensive day to fly to Toronto Pearson Intl Airport is Thursday, with ticket prices averaging around $929.

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 $814 when looking at flights departing in the afternoon. Flights at noon are often more expensive with an average ticket price of $1,053.

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

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?

No. A direct flight is the cheapest option for a flight between St. Louis to Toronto Pearson Intl Airport.

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

As of April 2026, prices for St. Louis to Toronto Pearson Intl Airport flights are approximately 46% 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

$450

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 $450. The best round-trip flight deal from St. Louis to Toronto Pearson Intl Airport found on momondo in the last 72 hours is $794.
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

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

  • 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
9,531 reviews
Search United Airlines flights
Air CanadaPriceFrom $220Free CancellationRating
7.1
10,883 reviews
Search Air Canada flights
American AirlinesPriceFrom $270Free CancellationRating
7.1
11,549 reviews
Search American Airlines flights

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

    United Airlines operates around 7 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 $448, 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 9,533 reviews.

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

    Air Canada (7.1/10 from 10,883 reviews) operates around 7 flights from St. Louis to Toronto Pearson Intl Airport in any given week. The average Air Canada airfare for this route is around $564, with deals from around $220 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
Barrie
Kitchener
St. Catharines
Collingwood
Cambridge
Burlington
Peterborough
Guelph
Whitby
Orillia
Stratford
Oshawa

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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