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Cheap flights from St. Louis to Toronto from $110

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 12/4. 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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Cheap round-trip flights

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Multiple Airlines Logo
5:06 pm - 2:20 pmSTL-YYZ
20h 14m1 stop
Multiple Airlines Logo
7:10 am - 10:37 pmYYZ-STL
16h 27m1 stop
$241Multiple Airlines
Find Deal
Wed, Jan 14 - Sat, Jan 17
Multiple Airlines Logo
5:11 pm - 2:20 pmSTL-YYZ
20h 09m1 stop
Multiple Airlines Logo
7:15 am - 10:37 pmYYZ-STL
16h 22m1 stop
$270Multiple Airlines
Find Deal
Thu, Jan 8 - Wed, Jan 14
American Airlines Logo
5:15 am - 5:44 pmSTL-YYZ
11h 29m1 stop
American Airlines Logo
1:14 pm - 9:15 pmYYZ-STL
9h 01m1 stop
$276American Airlines
Find Deal
Mon, Dec 15 - Thu, Jan 8
American Airlines Logo
6:33 pm - 10:57 amSTL-YYZ
15h 24m1 stop
American Airlines Logo
11:38 am - 6:03 pmYYZ-STL
7h 25m1 stop
$279American Airlines
Find Deal
Sat, Feb 14 - Sat, Feb 21
Multiple Airlines Logo
5:11 pm - 2:20 pmSTL-YYZ
20h 09m1 stop
Multiple Airlines Logo
1:30 pm - 8:53 pmYYZ-STL
32h 23m2 stops
$293Multiple Airlines
Find Deal
Thu, Jan 8 - Wed, Jan 14
Multiple Airlines Logo
10:47 am - 12:11 amSTL-YYZ
36h 24m2 stops
Multiple Airlines Logo
7:10 am - 10:33 pmYYZ-STL
16h 23m1 stop
$295Multiple Airlines
Find Deal
Mon, Dec 15 - Thu, Jan 8
Multiple Airlines Logo
5:06 pm - 2:20 pmSTL-YYZ
20h 14m1 stop
Multiple Airlines Logo
2:20 pm - 9:46 amYYZ-STL
20h 26m2 stops
$296Multiple Airlines
Find Deal
Wed, Jan 14 - Sat, Jan 17
American Airlines Logo
10:03 am - 9:29 pmSTL-YYZ
10h 26m1 stop
American Airlines Logo
6:00 am - 1:49 pmYYZ-STL
8h 49m1 stop
$300American Airlines
Find Deal
Sat, Feb 14 - Sat, Feb 21
American Airlines Logo
6:33 pm - 10:57 amSTL-YYZ
15h 24m1 stop
American Airlines Logo
6:00 am - 1:49 pmYYZ-STL
8h 49m1 stop
$313American Airlines
Find Deal
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
7:41 am - 4:02 pmSTL-YYZ
7h 21m1 stop
United Airlines Logo
3:30 pm - 10:59 pmYYZ-STL
8h 29m1 stop
$405United Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4

United Airlines flights from St. Louis to Toronto

Our best United Airlines deals on St. Louis to Toronto flight tickets
United Airlines
Mar 3
STL7:41 amLambert-St Louis
7h 21m
1 stop
YYZ4:02 pmToronto Pearson Intl
Mar 4
YYZ3:30 pmToronto Pearson Intl
8h 29m
1 stop
STL10:59 pmLambert-St Louis
$405
Find similar
United Airlines
Nov 13
STL11:34 amLambert-St Louis
5h 15m
1 stop
YYZ5:49 pmToronto Pearson Intl
Nov 14
YYZ4:10 pmToronto Pearson Intl
6h 44m
1 stop
STL9:54 pmLambert-St Louis
$482
Find similar
United Airlines
Nov 9
STL3:14 pmLambert-St Louis
5h 07m
1 stop
YYZ9:21 pmToronto Pearson Intl
Nov 13
YYZ9:00 amToronto Pearson Intl
6h 24m
1 stop
STL2:24 pmLambert-St Louis
$649
Find similar

American Airlines flights from St. Louis to Toronto

Our best American Airlines deals on St. Louis to Toronto flight tickets
American Airlines
Dec 15
STL5:15 amLambert-St Louis
11h 29m
1 stop
YYZ5:44 pmToronto Pearson Intl
Jan 8
YYZ1:14 pmToronto Pearson Intl
9h 01m
1 stop
STL9:15 pmLambert-St Louis
$276
Find similar
American Airlines
Feb 14
STL6:33 pmLambert-St Louis
15h 24m
1 stop
YYZ10:57 amToronto Pearson Intl
Feb 21
YYZ11:38 amToronto Pearson Intl
7h 25m
1 stop
STL6:03 pmLambert-St Louis
$279
Find similar
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
8h 49m
1 stop
STL1:49 pmLambert-St Louis
$300
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 October 30, 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

Wed 1/14

5:06 pm-2:20 pm

1 stop20h 14m

Toronto Pearson Intl

Sat 1/17

7:10 am-10:37 pm

1 stop16h 27m

$241

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 1/8

5:11 pm-2:20 pm

1 stop20h 09m

Toronto Pearson Intl

Wed 1/14

7:15 am-10:37 pm

1 stop16h 22m

$270

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 12/15

5:15 am-5:44 pm

1 stop11h 29m

Toronto Pearson Intl

Thu 1/8

1:14 pm-9:15 pm

1 stop9h 01m

$276

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/14

6:33 pm-10:57 am

1 stop15h 24m

Toronto Pearson Intl

Sat 2/21

11:38 am-6:03 pm

1 stop7h 25m

$279

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 1/8

5:11 pm-2:20 pm

1 stop20h 09m

Toronto Pearson Intl

Wed 1/14

1:30 pm-8:53 pm

2 stops32h 23m

$293

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 12/15

10:47 am-12:11 am

2 stops36h 24m

Toronto Pearson Intl

Thu 1/8

7:10 am-10:33 pm

1 stop16h 23m

$295

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 1/14

5:06 pm-2:20 pm

1 stop20h 14m

Toronto Pearson Intl

Sat 1/17

2:20 pm-9:46 am

2 stops20h 26m

$296

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-1:49 pm

1 stop8h 49m

$300

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/28

6:33 pm-10:57 am

1 stop15h 24m

Toronto Pearson Intl

Wed 3/4

6:00 am-1:49 pm

1 stop8h 49m

$313

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 3/3

7:41 am-4:02 pm

1 stop7h 21m

Toronto Pearson Intl

Wed 3/4

3:30 pm-10:59 pm

1 stop8h 29m

$405

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?

What is the cheapest month to fly to Toronto?

The month of January is, on average, the cheapest month to fly to Toronto from St. Louis, with most prices found around $286. If you are unable to visit Toronto during the month of January, then departing from St. Louis during the month April is also very affordable. Most momondo users find prices during this month for around $314.

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 $834. 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 $992.

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 $899. 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 $488 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

$179

Fastest flight time

1h 57m

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 $179. The best round-trip flight deal from St. Louis to Toronto found on momondo in the last 72 hours is $620.
The fastest flight from St. Louis to Toronto takes 1h 57m
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 2h 01m.

  • 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 $214Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
Air CanadaPriceFrom $221Free CancellationRating
7.1
10,376 reviews
Search Air Canada flights
American AirlinesPriceFrom $391Free CancellationRating
7.2
11,030 reviews
Search American Airlines flights

  • United Airlines Flights From St. Louis to Toronto

    United Airlines flight deals from St. Louis to Toronto start from $214 round-trip. Over the 4 United Airlines flights for this route in a normal week, average airfare is usually $529 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 $221 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around $530. Air Canada operates 4 flights to Toronto from St. Louis in an average week. Users have rated it 7.1/10 across 10,376 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