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Cheap flights from St. Louis to Toronto from $105

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 12/15. 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

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Multiple Airlines Logo
3:30 pm - 11:43 amSTL-YYZ
19h 13m1 stop
Multiple Airlines Logo
7:15 am - 10:33 pmYYZ-STL
16h 18m1 stop
$271Multiple Airlines
Find Deal
Sat, Dec 13 - Tue, Dec 16
Multiple Airlines Logo
7:43 pm - 11:43 amSTL-YYZ
15h 00m2 stops
Multiple Airlines Logo
7:15 am - 10:33 pmYYZ-STL
16h 18m1 stop
$273Multiple Airlines
Find Deal
Sat, Dec 13 - Tue, Dec 16
American Airlines Logo
10:03 am - 9:29 pmSTL-YYZ
10h 26m1 stop
American Airlines Logo
6:00 am - 6:03 pmYYZ-STL
13h 03m1 stop
$276American Airlines
Find Deal
Sat, Feb 14 - Sat, Feb 21
Multiple Airlines Logo
3:30 pm - 10:35 pmSTL-YYZ
30h 05m1 stop
Multiple Airlines Logo
7:15 am - 10:33 pmYYZ-STL
16h 18m1 stop
$283Multiple Airlines
Find Deal
Fri, Dec 12 - Mon, Dec 15
Multiple Airlines Logo
3:30 pm - 2:13 pmSTL-YYZ
21h 43m1 stop
Multiple Airlines Logo
7:15 am - 10:33 pmYYZ-STL
16h 18m1 stop
$284Multiple Airlines
Find Deal
Tue, Dec 9 - Tue, Dec 16
Multiple Airlines Logo
3:30 pm - 8:13 pmSTL-YYZ
27h 43m2 stops
Multiple Airlines Logo
7:15 am - 10:33 pmYYZ-STL
16h 18m1 stop
$291Multiple Airlines
Find Deal
Tue, Dec 9 - Tue, Dec 16
Multiple Airlines Logo
3:30 pm - 10:35 pmSTL-YYZ
30h 05m1 stop
Multiple Airlines Logo
7:15 am - 10:33 pmYYZ-STL
16h 18m2 stops
$293Multiple Airlines
Find Deal
Fri, Dec 12 - Wed, Jan 7
Multiple Airlines Logo
3:30 pm - 10:35 pmSTL-YYZ
30h 05m1 stop
Multiple Airlines Logo
7:15 am - 10:33 pmYYZ-STL
16h 18m1 stop
$294Multiple Airlines
Find Deal
Fri, Dec 12 - Wed, Jan 7
Multiple Airlines Logo
3:30 pm - 5:53 pmSTL-YYZ
25h 23m1 stop
Multiple Airlines Logo
12:50 pm - 10:33 pmYYZ-STL
10h 43m1 stop
$300Multiple Airlines
Find Deal
Wed, Dec 3 - Mon, Dec 8
Multiple Airlines Logo
7:43 pm - 5:53 pmSTL-YYZ
21h 10m2 stops
Multiple Airlines Logo
12:50 pm - 10:33 pmYYZ-STL
10h 43m1 stop
$301Multiple Airlines
Find Deal
Wed, Dec 3 - Mon, Dec 8

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
Feb 14
STL10:03 amLambert-St Louis
10h 26m
1 stop
YYZ9:29 pmToronto Pearson Intl
Feb 21
YYZ6:00 amToronto Pearson Intl
13h 03m
1 stop
STL6:03 pmLambert-St Louis
$276
Find similar
American Airlines
Dec 9
STL5:15 amLambert-St Louis
9h 48m
1 stop
YYZ4:03 pmToronto Pearson Intl
Dec 16
YYZ1:10 pmToronto Pearson Intl
8h 14m
1 stop
STL8:24 pmLambert-St Louis
$307
Find similar
American Airlines
Jan 6
STL6:00 amLambert-St Louis
9h 03m
1 stop
YYZ4:03 pmToronto Pearson Intl
Jan 10
YYZ11:30 amToronto Pearson Intl
7h 43m
1 stop
STL6:13 pmLambert-St Louis
$322
Find similar

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
Mar 3
STL8:21 amLambert-St Louis
7h 18m
1 stop
YYZ4:39 pmToronto Pearson Intl
Mar 4
YYZ3:30 pmToronto Pearson Intl
8h 29m
1 stop
STL10:59 pmLambert-St Louis
$424
Find similar
United Airlines
Feb 9
STL9:57 amLambert-St Louis
5h 05m
1 stop
YYZ4:02 pmToronto Pearson Intl
Feb 9
YYZ7:40 pmToronto Pearson Intl
15h 33m
1 stop
STL10:13 amLambert-St Louis
$470
Find similar
United Airlines
Feb 23
STL6:30 amLambert-St Louis
6h 44m
2 stops
YYZ2:14 pmToronto Pearson Intl
Feb 23
YYZ5:30 pmToronto Pearson Intl
6h 29m
1 stop
STL10:59 pmLambert-St Louis
$479
Find similar

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 November 13, 2025.
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

Sat 12/13

3:30 pm-11:43 am

1 stop19h 13m

Toronto Pearson Intl

Tue 12/16

7:15 am-10:33 pm

1 stop16h 18m

$271

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 12/13

7:43 pm-11:43 am

2 stops15h 00m

Toronto Pearson Intl

Tue 12/16

7:15 am-10:33 pm

1 stop16h 18m

$273

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/14

10:03 am-9:29 pm

1 stop10h 26m

Toronto Pearson Intl

Sat 2/21

6:00 am-6:03 pm

1 stop13h 03m

$276

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 12/12

3:30 pm-10:35 pm

1 stop30h 05m

Toronto Pearson Intl

Mon 12/15

7:15 am-10:33 pm

1 stop16h 18m

$283

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 12/9

3:30 pm-2:13 pm

1 stop21h 43m

Toronto Pearson Intl

Tue 12/16

7:15 am-10:33 pm

1 stop16h 18m

$284

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 12/9

3:30 pm-8:13 pm

2 stops27h 43m

Toronto Pearson Intl

Tue 12/16

7:15 am-10:33 pm

1 stop16h 18m

$291

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 12/12

3:30 pm-10:35 pm

1 stop30h 05m

Toronto Pearson Intl

Wed 1/7

7:15 am-10:33 pm

2 stops16h 18m

$293

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 12/12

3:30 pm-10:35 pm

1 stop30h 05m

Toronto Pearson Intl

Wed 1/7

7:15 am-10:33 pm

1 stop16h 18m

$294

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 12/3

3:30 pm-5:53 pm

1 stop25h 23m

Toronto Pearson Intl

Mon 12/8

12:50 pm-10:33 pm

1 stop10h 43m

$300

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 12/3

7:43 pm-5:53 pm

2 stops21h 10m

Toronto Pearson Intl

Mon 12/8

12:50 pm-10:33 pm

1 stop10h 43m

$301

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 January. Flight prices, which tend to average around $285, 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 January, then you should wait until May to fly from St. Louis, when ticket prices are also cheap, with an average price of $403.

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 $822. The most expensive day to fly to Toronto Pearson Intl Airport is Friday, with ticket prices averaging around $987.

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 $893 when looking at flights departing in the afternoon. Flights at noon are often more expensive with an average ticket price of $1,180.

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 $493 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?

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 November 2025, prices for St. Louis to Toronto Pearson Intl Airport flights are approximately 17% 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

$179

Fastest flight time

1h 57m

Direct flights

Every day
The best one-way flight to Toronto Pearson Intl Airport from St. Louis in the past 72 hours is $179. The best round-trip flight deal from St. Louis to Toronto Pearson Intl Airport found on momondo in the last 72 hours is $610.
The fastest flight from St. Louis to Toronto Pearson Intl Airport takes 1h 57m
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 2h 01m.

  • 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 $214Free CancellationRating
7.4
9,015 reviews
Search United Airlines flights
Air CanadaPriceFrom $221Free CancellationRating
7.1
10,444 reviews
Search Air Canada flights
American AirlinesPriceFrom $270Free CancellationRating
7.2
11,050 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 $529, but momondo users have found United Airlines deals from St. Louis to Toronto Pearson Intl Airport from as low as $214 round-trip. United Airlines has been scored 7.4/10 in 9,015 reviews.

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

    Air Canada (7.1/10 from 10,444 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 $530, with deals from around $221 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
Cambridge
Kitchener
Guelph
Barrie
Burlington
Peterborough
Milton
Collingwood
Whitby
St. Catharines
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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