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Cheap flights from St. Louis to Toronto from $132

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 2/19. 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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:49 pm - 2:20 pm
STL
-
YYZ
21h 31m1 stop
Multiple Airlines Logo
7:15 am - 10:27 pm
YYZ
-
STL
16h 12m1 stop
$235Multiple Airlines
Wed, Feb 18 - Tue, Feb 24
Multiple Airlines Logo
8:17 pm - 7:55 pm
STL
-
YYZ
22h 38m2 stops
Multiple Airlines Logo
7:15 am - 10:27 pm
YYZ
-
STL
16h 12m1 stop
$260Multiple Airlines
Wed, Feb 18 - Tue, Feb 24
Multiple Airlines Logo
5:42 pm - 2:20 pm
STL
-
YYZ
19h 38m1 stop
Multiple Airlines Logo
7:15 am - 11:33 pm
YYZ
-
STL
17h 18m1 stop
$282Multiple Airlines
Thu, Jan 29 - Tue, Feb 3
Multiple Airlines Logo
5:42 pm - 2:20 pm
STL
-
YYZ
19h 38m1 stop
Multiple Airlines Logo
3:40 pm - 6:51 am
YYZ
-
STL
16h 11m2 stops
$289Multiple Airlines
Thu, Jan 29 - Tue, Feb 3
Multiple Airlines Logo
5:42 pm - 2:20 pm
STL
-
YYZ
19h 38m1 stop
Multiple Airlines Logo
9:45 am - 12:08 pm
YYZ
-
STL
27h 23m1 stop
$301Multiple Airlines
Wed, Jan 21 - Sat, Jan 24
Multiple Airlines Logo
10:16 am - 12:14 am
STL
-
YYZ
12h 58m1 stop
Multiple Airlines Logo
7:45 am - 1:51 pm
YYZ
-
STL
31h 06m2 stops
$303Multiple Airlines
Mon, Feb 9 - Mon, Feb 16
Multiple Airlines Logo
5:42 pm - 2:08 pm
STL
-
YYZ
19h 26m1 stop
Multiple Airlines Logo
4:45 pm - 1:51 pm
YYZ
-
STL
22h 06m1 stop
$320Multiple Airlines
Mon, Feb 9 - Mon, Feb 16
Multiple Airlines Logo
5:42 pm - 2:20 pm
STL
-
YYZ
19h 38m1 stop
Multiple Airlines Logo
2:10 pm - 12:08 pm
YYZ
-
STL
22h 58m2 stops
$326Multiple Airlines
Wed, Jan 21 - Sat, Jan 24
Multiple Airlines Logo
5:42 pm - 12:14 am
STL
-
YYZ
29h 32m1 stop
Multiple Airlines Logo
10:15 pm - 1:51 pm
YYZ
-
STL
40h 36m2 stops
$332Multiple Airlines
Sun, Feb 8 - Sun, Feb 15
Multiple Airlines Logo
10:42 am - 12:14 am
STL
-
YYZ
12h 32m2 stops
Multiple Airlines Logo
8:00 pm - 7:13 am
YYZ
-
STL
12h 13m1 stop
$336Multiple Airlines
Thu, Apr 9 - Sun, Apr 12

Alaska Airlines flights from St. Louis to Toronto

Our best Alaska Airlines deals on St. Louis to Toronto flight tickets
Alaska Airlines
Feb 8
STL2:50 pmLambert-St Louis
23h 45m
1 stop
YYZ3:35 pmToronto Pearson Intl
Feb 14
YYZ4:45 pmToronto Pearson Intl
22h 38m
1 stop
STL2:23 pmLambert-St Louis
$373
Alaska Airlines
Mar 28
STL5:30 pmLambert-St Louis
21h 15m
1 stop
YYZ3:45 pmToronto Pearson Intl
Apr 6
YYZ4:55 pmToronto Pearson Intl
22h 56m
1 stop
STL2:51 pmLambert-St Louis
$398
Alaska Airlines
Feb 14
STL2:47 pmLambert-St Louis
23h 48m
1 stop
YYZ3:35 pmToronto Pearson Intl
Feb 21
YYZ4:45 pmToronto Pearson Intl
22h 38m
1 stop
STL2:23 pmLambert-St Louis
$448

Air Canada flights from St. Louis to Toronto

Our best Air Canada deals on St. Louis to Toronto flight tickets
Air Canada
Feb 20
STL4:05 pmLambert-St Louis
2h 01m
YYZ7:06 pmToronto Pearson Intl
Feb 27
YYZ2:00 pmToronto Pearson Intl
2h 29m
STL3:29 pmLambert-St Louis
$361
Air Canada
Feb 20
STL4:05 pmLambert-St Louis
2h 01m
YYZ7:06 pmToronto Pearson Intl
Feb 27
YYZ3:30 pmToronto Pearson Intl
6h 35m
1 stop
STL9:05 pmLambert-St Louis
$400
Air Canada
Jan 21
STL4:05 pmLambert-St Louis
2h 01m
YYZ7:06 pmToronto Pearson Intl
Jan 24
YYZ2:00 pmToronto Pearson Intl
2h 29m
STL3:29 pmLambert-St Louis
$424

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 8, 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

Wed 2/18

3:49 pm-2:20 pm

1 stop21h 31m

Toronto Pearson Intl

Tue 2/24

7:15 am-10:27 pm

1 stop16h 12m

$235

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 2/18

8:17 pm-7:55 pm

2 stops22h 38m

Toronto Pearson Intl

Tue 2/24

7:15 am-10:27 pm

1 stop16h 12m

$260

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 1/29

5:42 pm-2:20 pm

1 stop19h 38m

Toronto Pearson Intl

Tue 2/3

7:15 am-11:33 pm

1 stop17h 18m

$282

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 1/29

5:42 pm-2:20 pm

1 stop19h 38m

Toronto Pearson Intl

Tue 2/3

3:40 pm-6:51 am

2 stops16h 11m

$289

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 1/21

5:42 pm-2:20 pm

1 stop19h 38m

Toronto Pearson Intl

Sat 1/24

9:45 am-12:08 pm

1 stop27h 23m

$301

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 2/9

10:16 am-12:14 am

1 stop12h 58m

Toronto Pearson Intl

Mon 2/16

7:45 am-1:51 pm

2 stops31h 06m

$303

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 2/9

5:42 pm-2:08 pm

1 stop19h 26m

Toronto Pearson Intl

Mon 2/16

4:45 pm-1:51 pm

1 stop22h 06m

$320

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 1/21

5:42 pm-2:20 pm

1 stop19h 38m

Toronto Pearson Intl

Sat 1/24

2:10 pm-12:08 pm

2 stops22h 58m

$326

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 2/8

5:42 pm-12:14 am

1 stop29h 32m

Toronto Pearson Intl

Sun 2/15

10:15 pm-1:51 pm

2 stops40h 36m

$332

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 4/9

10:42 am-12:14 am

2 stops12h 32m

Toronto Pearson Intl

Sun 4/12

8:00 pm-7:13 am

1 stop12h 13m

$336

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 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 $808. 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 $977.

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 $883. 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 $1,182. 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

Mon, Tue, Thu, Fri, Sat and Sun

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 $637.
The fastest flight from St. Louis to Toronto takes 1h 51m
Direct flights go from St. Louis to Toronto on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is Air Canada.
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
9,141 reviews
Search United Airlines flights
Air CanadaPriceFrom $221Free CancellationRating
7.1
10,603 reviews
Search Air Canada flights
American AirlinesPriceFrom $270Free CancellationRating
7.2
11,095 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 6 United Airlines flights for this route in a normal week, average airfare is usually $489 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 $540. Air Canada operates 6 flights to Toronto from St. Louis in an average week. Users have rated it 7.1/10 across 10,603 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