Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Toronto from $125

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 4/2. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Toronto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:45 pm - 7:36 pm
STL
-
YYZ
20h 51m
2 stops
Multiple Airlines Logo
8:20 pm - 11:11 am
YYZ
-
STL
15h 51m
1 stop
$267Multiple Airlines
Mon, Feb 2 - Fri, Feb 6
Multiple Airlines Logo
3:49 pm - 2:20 pm
STL
-
YYZ
21h 31m
1 stop
Multiple Airlines Logo
8:00 pm - 8:02 pm
YYZ
-
STL
25h 02m
2 stops
$273Multiple Airlines
Wed, Feb 18 - Sun, Feb 22
Multiple Airlines Logo
8:22 pm - 11:28 am
STL
-
YYZ
38h 06m
2 stops
Multiple Airlines Logo
5:15 pm - 11:33 pm
YYZ
-
STL
7h 18m
1 stop
$291Multiple Airlines
Mon, Feb 2 - Fri, Feb 6
Multiple Airlines Logo
3:49 pm - 2:20 pm
STL
-
YYZ
21h 31m
1 stop
Multiple Airlines Logo
8:00 pm - 11:59 pm
YYZ
-
STL
28h 59m
1 stop
$309Multiple Airlines
Wed, Feb 18 - Sun, Feb 22
Multiple Airlines Logo
5:42 pm - 11:26 am
STL
-
YYZ
16h 44m
1 stop
Multiple Airlines Logo
7:15 am - 11:33 pm
YYZ
-
STL
17h 18m
1 stop
$327Multiple Airlines
Sun, Feb 1 - Tue, Feb 3
Multiple Airlines Logo
10:16 am - 12:14 am
STL
-
YYZ
12h 58m
1 stop
Multiple Airlines Logo
8:20 pm - 11:11 am
YYZ
-
STL
15h 51m
1 stop
$329Multiple Airlines
Mon, Feb 2 - Fri, Feb 6
Multiple Airlines Logo
1:03 pm - 12:23 pm
STL
-
YYZ
22h 20m
2 stops
Multiple Airlines Logo
7:15 am - 11:33 pm
YYZ
-
STL
17h 18m
1 stop
$336Multiple Airlines
Sun, Feb 1 - Tue, Feb 3
Multiple Airlines Logo
10:16 am - 12:29 am
STL
-
YYZ
13h 13m
1 stop
Multiple Airlines Logo
5:15 pm - 11:33 pm
YYZ
-
STL
7h 18m
1 stop
$338Multiple Airlines
Mon, Feb 2 - Fri, Feb 6
Multiple Airlines Logo
3:49 pm - 12:14 am
STL
-
YYZ
7h 25m
1 stop
Multiple Airlines Logo
8:00 pm - 9:49 am
YYZ
-
STL
14h 49m
2 stops
$350Multiple Airlines
Fri, Feb 27 - Fri, Mar 6
Multiple Airlines Logo
6:41 pm - 6:20 am
STL
-
YYZ
10h 39m
1 stop
Multiple Airlines Logo
5:45 pm - 12:19 pm
YYZ
-
STL
43h 34m
2 stops
$362Multiple Airlines
Sat, Feb 28 - Sat, Mar 7

Air Canada flights from St. Louis to Toronto

Our best Air Canada deals on St. Louis to Toronto flight tickets
Air Canada
Feb 2
STL4:05 pmLambert-St Louis
2h 01m
YYZ7:06 pmToronto Pearson Intl
Feb 6
YYZ2:00 pmToronto Pearson Intl
2h 29m
STL3:29 pmLambert-St Louis
$366
Air Canada
Feb 8
STL4:05 pmLambert-St Louis
2h 01m
YYZ7:06 pmToronto Pearson Intl
Feb 14
YYZ2:00 pmToronto Pearson Intl
2h 29m
STL3:29 pmLambert-St Louis
$424
Air Canada
Feb 27
STL4:05 pmLambert-St Louis
2h 01m
YYZ7:06 pmToronto Pearson Intl
Mar 6
YYZ6:40 pmToronto Pearson Intl
5h 19m
1 stop
STL10:59 pmLambert-St Louis
$426

United Airlines flights from St. Louis to Toronto

Our best United Airlines deals on St. Louis to Toronto flight tickets
United Airlines
Feb 8
STL8:05 amLambert-St Louis
6h 57m
1 stop
YYZ4:02 pmToronto Pearson Intl
Feb 14
YYZ5:30 pmToronto Pearson Intl
4h 35m
1 stop
STL9:05 pmLambert-St Louis
$449
United Airlines
Feb 8
STL8:05 amLambert-St Louis
8h 44m
2 stops
YYZ5:49 pmToronto Pearson Intl
Feb 15
YYZ6:40 pmToronto Pearson Intl
6h 19m
1 stop
STL11:59 pmLambert-St Louis
$459
United Airlines
Feb 19
STL7:41 amLambert-St Louis
9h 08m
2 stops
YYZ5:49 pmToronto Pearson Intl
Feb 21
YYZ2:45 pmToronto Pearson Intl
7h 20m
2 stops
STL9:05 pmLambert-St Louis
$464

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Toronto 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 January 15, 2026.
Use the filters below to find and compare flights from St. Louis to Toronto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 2/2

9:45 pm-7:36 pm

2 stops20h 51m

Toronto Pearson Intl

Fri 2/6

8:20 pm-11:11 am

1 stop15h 51m

$267

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 2/18

3:49 pm-2:20 pm

1 stop21h 31m

Toronto Pearson Intl

Sun 2/22

8:00 pm-8:02 pm

2 stops25h 02m

$273

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 2/2

8:22 pm-11:28 am

2 stops38h 06m

Toronto Pearson Intl

Fri 2/6

5:15 pm-11:33 pm

1 stop7h 18m

$291

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 2/18

3:49 pm-2:20 pm

1 stop21h 31m

Toronto Pearson Intl

Sun 2/22

8:00 pm-11:59 pm

1 stop28h 59m

$309

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 2/1

5:42 pm-11:26 am

1 stop16h 44m

Toronto Pearson Intl

Tue 2/3

7:15 am-11:33 pm

1 stop17h 18m

$327

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 2/2

10:16 am-12:14 am

1 stop12h 58m

Toronto Pearson Intl

Fri 2/6

8:20 pm-11:11 am

1 stop15h 51m

$329

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 2/1

1:03 pm-12:23 pm

2 stops22h 20m

Toronto Pearson Intl

Tue 2/3

7:15 am-11:33 pm

1 stop17h 18m

$336

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 2/2

10:16 am-12:29 am

1 stop13h 13m

Toronto Pearson Intl

Fri 2/6

5:15 pm-11:33 pm

1 stop7h 18m

$338

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 2/27

3:49 pm-12:14 am

1 stop7h 25m

Toronto Pearson Intl

Fri 3/6

8:00 pm-9:49 am

2 stops14h 49m

$350

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/28

6:41 pm-6:20 am

1 stop10h 39m

Toronto Pearson Intl

Sat 3/7

5:45 pm-12:19 pm

2 stops43h 34m

$362

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Toronto from

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

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?

What is the cheapest month to fly to Toronto?

The month of April is, on average, the cheapest month to fly to Toronto from St. Louis, with most prices found around $314. If you are unable to visit Toronto during the month of April, then departing from St. Louis during the month June is also very affordable. Most momondo users find prices during this month for around $363.

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

On average, the least expensive day to fly to Toronto from St. Louis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $801. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Toronto is Saturday, with ticket prices averaging around $979.

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

In the afternoon is the cheapest time of day to fly from St. Louis to Toronto when you can find flight prices for as low as $880. Flying to Toronto in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Toronto are more costly at noon, with an average ticket price of $1,158. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

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

There are 4 cabin classes available to choose from on Lambert-St Louis to Toronto 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 flights?

You could potentially save up to 7% on your flight if you consider stops on a St. Louis to Toronto flight.

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

When to book flights from St. Louis to Toronto

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

Cheap St. Louis to Toronto (STL to YTO) flight deals and tips

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

Best Price Found

$287

Fastest flight time

1h 51m

Direct flights

Every day

Airports in Toronto

3 airports
The best one-way flight to Toronto from St. Louis in the past 72 hours is $287. The best round-trip flight deal from St. Louis to Toronto found on momondo in the last 72 hours is $688.
The fastest flight from St. Louis to Toronto takes 1h 51m
Direct flights go from St. Louis to Toronto every day.
There are 3 airports in Toronto. From St. Louis there are direct flights to Toronto Pearson Intl (YYZ).
Search flight deals

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

    The straight-line distance from Lambert-St Louis to Toronto is 659.9 mi. A reasonable flight in good conditions will take 1h 51m.

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

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

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

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

    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 Lambert-St Louis Airport to Toronto.

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

    The required travel and health documents for your Toronto 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. 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?

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

Best airlines flying from St. Louis to Toronto

Compare and see reviews for airlines that fly from St. Louis to Toronto with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $199Free CancellationRating
7.4
9,163 reviews
Search United Airlines flights
Air CanadaPriceFrom $214Free CancellationRating
7.1
10,622 reviews
Search Air Canada flights
American AirlinesPriceFrom $270Free CancellationRating
7.2
11,131 reviews
Search American Airlines flights

  • United Airlines Flights From St. Louis to Toronto

    United Airlines flight deals from St. Louis to Toronto start from $199 round-trip. Over the 7 United Airlines flights for this route in a normal week, average airfare is usually $397 round-trip - but some users have found much cheaper deals with momondo.

  • Air Canada Flights From St. Louis to Toronto

    Air Canada is also a popular choice for this route. Air Canada flight deals for St. Louis to Toronto start from as low as $214 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around $511. Air Canada operates 7 flights to Toronto from St. Louis in an average week. Users have rated it 7.1/10 across 10,622 reviews.

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Toronto from St. Louis.

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

Yes. momondo allows you to filter the results for St. Louis to Toronto flights to just show those with flexible booking policies.

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

Once you have performed a search for St. Louis to Toronto 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 St. Louis to Toronto right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Toronto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Toronto 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 2/14
Sat 2/21
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Canada

Fly into one of these airports located in Toronto

Airports listed have a maximum distance of 52.0 mi from Toronto
Toronto Region of Waterloo Intl Airport
Toronto Island Airport
Toronto Pearson Intl Airport