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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 9/25. 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

American Airlines Logo
6:10 am - 2:31 pmSTL-YYZ
7h 21m1 stop
American Airlines Logo
6:30 am - 3:24 pmYYZ-STL
9h 54m1 stop
$331American Airlines
Find Deal
Tue, Sep 9 - Sat, Sep 13
 Logo
10:45 am - 11:47 pmSTL-YYZ
12h 02m1 stop
 Logo
6:30 am - 2:39 pmYYZ-STL
9h 09m1 stop
Sat, Aug 2 - Sat, Aug 9
American Airlines Logo
7:23 am - 5:41 pmSTL-YYZ
9h 18m1 stop
American Airlines Logo
1:16 pm - 11:51 pmYYZ-STL
11h 35m1 stop
$335American Airlines
Find Deal
Thu, Aug 7 - Fri, Aug 8
American Airlines Logo
6:02 am - 12:01 pmSTL-YYZ
4h 59m1 stop
American Airlines Logo
3:14 pm - 10:17 pmYYZ-STL
8h 03m1 stop
$339American Airlines
Find Deal
Tue, Aug 12 - Tue, Aug 12
Delta Logo
6:40 am - 5:59 pmSTL-YYZ
10h 19m2 stops
Delta Logo
10:20 am - 6:05 pmYYZ-STL
8h 45m1 stop
$390Delta
Find Deal
Tue, Aug 12 - Wed, Aug 20
Air Canada Logo
9:15 am - 12:15 pmSTL-YYZ
2h 00mnonstop
Air Canada Logo
2:15 pm - 3:21 pmYYZ-STL
2h 06mnonstop
$391Air Canada
Find Deal
Tue, Aug 12 - Wed, Aug 20
Air Canada Logo
9:15 am - 12:15 pmSTL-YYZ
2h 00mnonstop
Air Canada Logo
2:15 pm - 3:21 pmYYZ-STL
2h 06mnonstop
$392Air Canada
Find Deal
Thu, Aug 14 - Sat, Aug 23
United Airlines Logo
5:00 am - 11:49 amSTL-YYZ
5h 49m1 stop
United Airlines Logo
7:00 am - 12:46 pmYYZ-STL
6h 46m1 stop
$416United Airlines
Find Deal
Wed, Jul 23 - Sat, Jul 26
Delta Logo
6:00 am - 12:05 pmSTL-YYZ
5h 05m1 stop
Delta Logo
11:29 am - 4:18 pmYYZ-STL
5h 49m1 stop
$417Delta
Find Deal
Sun, Jul 20 - Wed, Jul 23
United Airlines Logo
11:25 am - 11:58 pmSTL-YYZ
11h 33m1 stop
United Airlines Logo
7:30 am - 3:47 pmYYZ-STL
9h 17m2 stops
$426United Airlines
Find Deal
Thu, Aug 7 - Thu, Aug 14

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
Sep 9
STL6:10 amLambert-St Louis
7h 21m
1 stop
YYZ2:31 pmToronto Pearson Intl
Sep 13
YYZ6:30 amToronto Pearson Intl
9h 54m
1 stop
STL3:24 pmLambert-St Louis
American Airlines
Aug 7
STL7:23 amLambert-St Louis
9h 18m
1 stop
YYZ5:41 pmToronto Pearson Intl
Aug 8
YYZ1:16 pmToronto Pearson Intl
11h 35m
1 stop
STL11:51 pmLambert-St Louis
American Airlines
Aug 12
STL6:02 amLambert-St Louis
4h 59m
1 stop
YYZ12:01 pmToronto Pearson Intl
Aug 12
YYZ3:14 pmToronto Pearson Intl
8h 03m
1 stop
STL10:17 pmLambert-St Louis

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
Jul 23
STL5:00 amLambert-St Louis
5h 49m
1 stop
YYZ11:49 amToronto Pearson Intl
Jul 26
YYZ7:00 amToronto Pearson Intl
6h 46m
1 stop
STL12:46 pmLambert-St Louis
United Airlines
Aug 7
STL11:25 amLambert-St Louis
11h 33m
1 stop
YYZ11:58 pmToronto Pearson Intl
Aug 14
YYZ7:30 amToronto Pearson Intl
9h 17m
2 stops
STL3:47 pmLambert-St Louis
United Airlines
Aug 23
STL9:17 amLambert-St Louis
5h 29m
1 stop
YYZ3:46 pmToronto Pearson Intl
Aug 26
YYZ7:00 amToronto Pearson Intl
14h 46m
3 stops
STL8:46 pmLambert-St Louis

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 October to fly from St. Louis, when ticket prices are also cheap, with an average price of $296.

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 Thursday when prices can be found for as low as $856. The most expensive day to fly to Toronto Pearson Intl Airport is Friday, with ticket prices averaging around $1,003.

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 $922 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 $466 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 13% 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 July 2025, prices for St. Louis to Toronto Pearson Intl Airport flights are approximately 12% cheaper 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

$137

Fastest flight time

2h 00m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat
The best one-way flight to Toronto Pearson Intl Airport from St. Louis in the past 72 hours is $137. The best round-trip flight deal from St. Louis to Toronto Pearson Intl Airport found on momondo in the last 72 hours is $331.
The fastest flight from St. Louis to Toronto Pearson Intl Airport takes 2h 00m
Direct flights go from St. Louis to Toronto Pearson Intl Airport on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. Airlines offering direct flights are: United Airlines and Air Canada.

  • 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 00m.

  • 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
8,842 reviews
Search United Airlines flights
Air CanadaPriceFrom $220Free CancellationRating
7.1
9,691 reviews
Search Air Canada flights
American AirlinesPriceFrom $395Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
  • United Airlines Flights From St. Louis to Toronto Pearson Intl Airport

    United Airlines operates around 13 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 $489, 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 8,842 reviews.

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

    Air Canada (7.1/10 from 9,691 reviews) operates around 13 flights from St. Louis to Toronto Pearson Intl Airport in any given week. The average Air Canada airfare for this route is around $480, 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
Brampton
Niagara-on-the-Lake
Markham
Vaughan
Oakville
Richmond Hill
Burlington
Kitchener
St. Catharines
Cambridge
Barrie
Guelph
Milton
Oshawa
Whitby
Waterloo
Orillia
Brantford

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.


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1 adult
Mon 7/14
Mon 7/21

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