Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

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 12/17. 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
5:11 pm - 11:20 pm
STL
-
YYZ
29h 09m2 stops
Multiple Airlines Logo
7:10 am - 11:33 pm
YYZ
-
STL
17h 23m1 stop
$257Multiple Airlines
Tue, Jan 13 - Mon, Jan 26
Multiple Airlines Logo
5:11 pm - 12:11 am
STL
-
YYZ
30h 00m1 stop
Multiple Airlines Logo
7:10 am - 11:33 pm
YYZ
-
STL
17h 23m1 stop
$281Multiple Airlines
Tue, Jan 13 - Mon, Jan 26
Multiple Airlines Logo
5:42 pm - 12:11 am
STL
-
YYZ
29h 29m1 stop
Multiple Airlines Logo
8:00 pm - 2:46 pm
YYZ
-
STL
19h 46m2 stops
$289Multiple Airlines
Tue, Jan 20 - Fri, Jan 30
Multiple Airlines Logo
1:07 pm - 6:20 am
STL
-
YYZ
16h 13m1 stop
Multiple Airlines Logo
7:00 am - 6:51 am
YYZ
-
STL
48h 51m2 stops
$293Multiple Airlines
Mon, Jan 12 - Mon, Jan 19
Multiple Airlines Logo
8:32 pm - 2:20 pm
STL
-
YYZ
40h 48m2 stops
Multiple Airlines Logo
7:10 am - 11:33 pm
YYZ
-
STL
17h 23m1 stop
$295Multiple Airlines
Wed, Jan 14 - Mon, Jan 26
Multiple Airlines Logo
5:11 pm - 12:11 am
STL
-
YYZ
30h 00m1 stop
Multiple Airlines Logo
8:00 pm - 9:21 am
YYZ
-
STL
14h 21m1 stop
$317Multiple Airlines
Tue, Jan 13 - Sun, Jan 25
American Airlines Logo
10:04 am - 9:29 pm
STL
-
YYZ
10h 25m1 stop
American Airlines Logo
11:38 am - 6:02 pm
YYZ
-
STL
7h 24m1 stop
$350American Airlines
Sat, Feb 14 - Sat, Feb 21
Multiple Airlines Logo
9:54 am - 11:43 am
STL
-
YYZ
24h 49m1 stop
Multiple Airlines Logo
7:10 am - 10:33 pm
YYZ
-
STL
16h 23m1 stop
$360Multiple Airlines
Sun, Dec 14 - Tue, Dec 16
Multiple Airlines Logo
5:11 pm - 12:11 am
STL
-
YYZ
30h 00m1 stop
Multiple Airlines Logo
7:10 am - 11:33 pm
YYZ
-
STL
17h 23m1 stop
$366Multiple Airlines
Wed, Jan 14 - Mon, Jan 26
Multiple Airlines Logo
3:30 pm - 2:20 pm
STL
-
YYZ
21h 50m1 stop
Multiple Airlines Logo
7:10 am - 10:33 pm
YYZ
-
STL
16h 23m1 stop
$371Multiple Airlines
Sat, Dec 13 - Mon, Dec 15

American Airlines flights from St. Louis to Toronto

Our best American Airlines deals on St. Louis to Toronto flight tickets
American Airlines
Feb 14
STL6:35 pmLambert-St Louis
15h 21m
1 stop
YYZ10:56 amToronto Pearson Intl
Feb 21
YYZ11:38 amToronto Pearson Intl
7h 24m
1 stop
STL6:02 pmLambert-St Louis
$350
Find similar
American Airlines
Feb 14
STL10:04 amLambert-St Louis
10h 25m
1 stop
YYZ9:29 pmToronto Pearson Intl
Feb 21
YYZ6:00 amToronto Pearson Intl
8h 56m
1 stop
STL1:56 pmLambert-St Louis
$394
Find similar
American Airlines
Jan 14
STL6:44 pmLambert-St Louis
15h 09m
1 stop
YYZ10:53 amToronto Pearson Intl
Jan 26
YYZ1:14 pmToronto Pearson Intl
9h 01m
1 stop
STL9:15 pmLambert-St Louis
$408
Find similar

United Airlines flights from St. Louis to Toronto

Our best United Airlines deals on St. Louis to Toronto flight tickets
United Airlines
Dec 25
STL8:05 amLambert-St Louis
6h 57m
1 stop
YYZ4:02 pmToronto Pearson Intl
Dec 30
YYZ6:50 amToronto Pearson Intl
6h 37m
1 stop
STL12:27 pmLambert-St Louis
$493
Find similar
United Airlines
Dec 22
STL5:02 pmLambert-St Louis
5h 57m
1 stop
YYZ11:59 pmToronto Pearson Intl
Dec 24
YYZ9:00 amToronto Pearson Intl
14h 22m
2 stops
STL10:22 pmLambert-St Louis
$498
Find similar
United Airlines
Dec 24
STL3:10 pmLambert-St Louis
7h 36m
2 stops
YYZ11:46 pmToronto Pearson Intl
Dec 26
YYZ9:00 amToronto Pearson Intl
6h 26m
1 stop
STL2:26 pmLambert-St Louis
$503
Find similar

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 December 7, 2025.
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

Tue 1/13

5:11 pm-11:20 pm

2 stops29h 09m

Toronto Pearson Intl

Mon 1/26

7:10 am-11:33 pm

1 stop17h 23m

$257

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 1/13

5:11 pm-12:11 am

1 stop30h 00m

Toronto Pearson Intl

Mon 1/26

7:10 am-11:33 pm

1 stop17h 23m

$281

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 1/20

5:42 pm-12:11 am

1 stop29h 29m

Toronto Pearson Intl

Fri 1/30

8:00 pm-2:46 pm

2 stops19h 46m

$289

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 1/12

1:07 pm-6:20 am

1 stop16h 13m

Toronto Pearson Intl

Mon 1/19

7:00 am-6:51 am

2 stops48h 51m

$293

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 1/14

8:32 pm-2:20 pm

2 stops40h 48m

Toronto Pearson Intl

Mon 1/26

7:10 am-11:33 pm

1 stop17h 23m

$295

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 1/13

5:11 pm-12:11 am

1 stop30h 00m

Toronto Pearson Intl

Sun 1/25

8:00 pm-9:21 am

1 stop14h 21m

$317

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/14

10:04 am-9:29 pm

1 stop10h 25m

Toronto Pearson Intl

Sat 2/21

11:38 am-6:02 pm

1 stop7h 24m

$350

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 12/14

9:54 am-11:43 am

1 stop24h 49m

Toronto Pearson Intl

Tue 12/16

7:10 am-10:33 pm

1 stop16h 23m

$360

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 1/14

5:11 pm-12:11 am

1 stop30h 00m

Toronto Pearson Intl

Mon 1/26

7:10 am-11:33 pm

1 stop17h 23m

$366

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 12/13

3:30 pm-2:20 pm

1 stop21h 50m

Toronto Pearson Intl

Mon 12/15

7:10 am-10:33 pm

1 stop16h 23m

$371

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 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 $392.

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 $813. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Toronto is Friday, with ticket prices averaging around $994.

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 $889. 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 $1,180. 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

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

You are more likely to see cheaper flights to Toronto from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Toronto for around $511 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Toronto from St. Louis for as low as $221 on momondo.

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?

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

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

$420

Fastest flight time

1h 55m

Direct flights

Every day

Airports in Toronto

1 airport
The best one-way flight to Toronto from St. Louis in the past 72 hours is $420. The best round-trip flight deal from St. Louis to Toronto found on momondo in the last 72 hours is $634.
The fastest flight from St. Louis to Toronto takes 1h 55m
Direct flights go from St. Louis to Toronto every day.
There is 1 airport near Toronto: 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 57m.

  • 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
9,072 reviews
Search United Airlines flights
Air CanadaPriceFrom $220Free CancellationRating
7.1
10,512 reviews
Search Air Canada flights
American AirlinesPriceFrom $270Free CancellationRating
7.2
11,044 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 $503 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 $220 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around $534. Air Canada operates 7 flights to Toronto from St. Louis in an average week. Users have rated it 7.1/10 across 10,512 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
Tue 1/6
Tue 1/13
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