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Cheap flights from St. Louis to Toronto from $135

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 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Toronto

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
5:00 am - 2:32 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
8h 32m1 stop Chicago O'Hare Intl
American Airlines Logo
3:13 pm - 12:27 amYYZ  Toronto Pearson Intl-STL Lambert-St Louis
10h 14m1 stop Chicago O'Hare Intl
$369American Airlines
Fri, Sep 11 - Thu, Sep 17
American Airlines Logo
7:29 am - 5:44 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
9h 15m1 stop Chicago O'Hare Intl
American Airlines Logo
11:36 am - 7:22 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
8h 46m1 stop Chicago O'Hare Intl
$369American Airlines
Fri, Oct 30 - Mon, Nov 2
American Airlines Logo
7:29 am - 5:44 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
9h 15m1 stop Chicago O'Hare Intl
American Airlines Logo
7:09 am - 4:43 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
10h 34m1 stop Chicago O'Hare Intl
$369American Airlines
Fri, Oct 30 - Mon, Nov 2
Multiple Airlines Logo
8:34 pm - 1:40 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
16h 06m1 stop Orlando
Multiple Airlines Logo
11:15 am - 9:40 amYYZ  Toronto Pearson Intl-STL Lambert-St Louis
23h 25m2 stops Fort Lauderdale Atlanta Hartsfield-Jackson
$376Multiple Airlines
Fri, Oct 30 - Mon, Nov 2
Multiple Airlines Logo
2:29 pm - 2:05 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
22h 36m2 stops Atlanta Hartsfield-Jackson Fort Lauderdale
Multiple Airlines Logo
9:50 am - 4:24 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
7h 34m1 stop Orlando
$376Multiple Airlines
Fri, Sep 11 - Thu, Sep 17
Multiple Airlines Logo
10:35 am - 12:10 amSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
12h 35m2 stops Atlanta Hartsfield-Jackson Orlando
Multiple Airlines Logo
6:30 am - 7:39 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
14h 09m1 stop Orlando
$400Multiple Airlines
Thu, Nov 5 - Sun, Nov 8
Air Canada Logo
8:55 am - 11:49 amSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
1h 54mnonstop
Air Canada Logo
6:55 pm - 8:00 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
2h 05mnonstop
$515Air Canada
Fri, Oct 2 - Tue, Oct 6
Air Canada Logo
12:10 pm - 7:53 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
6h 43m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
12:55 pm - 2:00 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
2h 05mnonstop
$519Air Canada
Fri, Oct 2 - Tue, Oct 6
United Airlines Logo
11:35 am - 8:18 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
7h 43m1 stop Chicago O'Hare Intl
United Airlines Logo
8:50 am - 3:43 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
7h 53m1 stop Chicago O'Hare Intl
$542United Airlines
Tue, Sep 29 - Wed, Sep 30
United Airlines Logo
11:35 am - 8:18 pmSTL  Lambert-St Louis-YYZ Toronto Pearson Intl
7h 43m1 stop Chicago O'Hare Intl
United Airlines Logo
8:50 am - 3:43 pmYYZ  Toronto Pearson Intl-STL Lambert-St Louis
7h 53m1 stop Chicago O'Hare Intl
$577United Airlines
Tue, Sep 29 - Wed, Sep 30

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WestJet flights from St. Louis to Toronto

Our best WestJet deals on St. Louis to Toronto flight tickets
WestJet
Aug 26
STL6:25 pmLambert-St Louis
13h 30m
1 stop
YYZ8:55 amToronto Pearson Intl
Aug 28
YYZ7:00 amToronto Pearson Intl
17h 58m
2 stops
STL11:58 pmLambert-St Louis
$512
WestJet
Aug 20
STL6:30 amLambert-St Louis
3h 49m
1 stop
YYZ11:19 amToronto Pearson Intl
Aug 31
YYZ12:09 pmToronto Pearson Intl
9h 33m
1 stop
STL8:42 pmLambert-St Louis
$605
WestJet
Aug 16
STL5:34 pmLambert-St Louis
29h 25m
2 stops
YYZ11:59 pmToronto Pearson Intl
Aug 19
YYZ6:00 amToronto Pearson Intl
10h 38m
1 stop
STL3:38 pmLambert-St Louis
$609

American Airlines flights from St. Louis to Toronto

Our best American Airlines deals on St. Louis to Toronto flight tickets
American Airlines
Oct 30
STL7:29 amLambert-St Louis
9h 16m
1 stop
YYZ5:45 pmToronto Pearson Intl
Nov 2
YYZ7:09 amToronto Pearson Intl
10h 34m
1 stop
STL4:43 pmLambert-St Louis
$369
American Airlines
Sep 11
STL5:00 amLambert-St Louis
8h 32m
1 stop
YYZ2:32 pmToronto Pearson Intl
Sep 17
YYZ3:13 pmToronto Pearson Intl
10h 14m
1 stop
STL12:27 amLambert-St Louis
$382
American Airlines
Sep 1
STL6:00 amLambert-St Louis
11h 30m
1 stop
YYZ6:30 pmToronto Pearson Intl
Sep 8
YYZ11:39 amToronto Pearson Intl
8h 48m
1 stop
STL7:27 pmLambert-St Louis
$386

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 August 6, 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

Cheapest round-trip

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 9/11

5:00 am-2:32 pm

1 stop8h 32m

Toronto Pearson Intl

Thu 9/17

3:13 pm-12:27 am

1 stop10h 14m

$369

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 10/30

7:29 am-5:44 pm

1 stop9h 15m

Toronto Pearson Intl

Mon 11/2

11:36 am-7:22 pm

1 stop8h 46m

$369

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 10/30

7:29 am-5:44 pm

1 stop9h 15m

Toronto Pearson Intl

Mon 11/2

7:09 am-4:43 pm

1 stop10h 34m

$369

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 10/30

8:34 pm-1:40 pm

1 stop16h 06m

Toronto Pearson Intl

Mon 11/2

11:15 am-9:40 am

2 stops23h 25m

$376

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 9/11

2:29 pm-2:05 pm

2 stops22h 36m

Toronto Pearson Intl

Thu 9/17

9:50 am-4:24 pm

1 stop7h 34m

$376

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Thu 11/5

10:35 am-12:10 am

2 stops12h 35m

Toronto Pearson Intl

Sun 11/8

6:30 am-7:39 pm

1 stop14h 09m

$400
Quickest round-trip

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 10/2

8:55 am-11:49 am

Nonstop1h 54m

Toronto Pearson Intl

Tue 10/6

6:55 pm-8:00 pm

Nonstop2h 05m

$515

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 10/2

12:10 pm-7:53 pm

1 stop6h 43m

Toronto Pearson Intl

Tue 10/6

12:55 pm-2:00 pm

Nonstop2h 05m

$519

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Tue 9/29

11:35 am-8:18 pm

1 stop7h 43m

Toronto Pearson Intl

Wed 9/30

8:50 am-3:43 pm

1 stop7h 53m

$542

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Tue 9/29

11:35 am-8:18 pm

1 stop7h 43m

Toronto Pearson Intl

Wed 9/30

8:50 am-3:43 pm

1 stop7h 53m

$577

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

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?

Prices are currently low for flights on this route.

Typical prices usually range from $654 to $1,094.
The lowest price recently found on this route was $369.

What is the cheapest month to fly to Toronto?

The month of December is, on average, the cheapest month to fly to Toronto from St. Louis, with most prices found around $466. If you are unable to visit Toronto during the month of December, then departing from St. Louis during the month March is also very affordable. Most momondo users find prices during this month for around $482.

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 Friday. momondo users have found tickets for Friday departures for as low as $788. 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 $967.

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

In the morning is the cheapest time of day to fly from St. Louis to Toronto when you can find flight prices for as low as $729. Flying to Toronto in the morning 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 $1,065. 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 St. Louis to Toronto flights?

There are 4 cabin classes available to choose from on 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 50% 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?

As of August 2026, prices for St. Louis to Toronto flights are approximately 13% cheaper when compared to flights at the same time last year.

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

$275

Fastest flight time

1h 54m

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 $275. The best round-trip flight deal from St. Louis to Toronto found on momondo in the last 72 hours is $415.
The fastest flight from St. Louis to Toronto takes 1h 54m
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

Frequently asked questions about flying from St. Louis to Toronto

  • 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 54m.

  • 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
Air CanadaPriceFrom $252Free CancellationRating
7.1
11,432 reviews
Search Air Canada flights
United AirlinesPriceFrom $253Free CancellationRating
7.4
10,075 reviews
Search United Airlines flights
American AirlinesPriceFrom $270Free CancellationRating
7.1
11,867 reviews
Search American Airlines flights

  • United Airlines Flights From St. Louis to Toronto

    United Airlines flight deals from St. Louis to Toronto start from $253 round-trip. Over the 13 United Airlines flights for this route in a normal week, average airfare is usually $631 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 $252 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around $621. Air Canada operates 13 flights to Toronto from St. Louis in an average week. Users have rated it 7.1/10 across 11,429 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.

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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