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Cheap flights from St. Louis to Toronto from $84

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 1/18. 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
9:46 pm - 6:20 am
STL
-
YYZ
31h 34m1 stop
Multiple Airlines Logo
7:10 am - 10:34 pm
YYZ
-
STL
16h 24m1 stop
$245Multiple Airlines
Sun, Jan 11 - Fri, Jan 16
Multiple Airlines Logo
9:46 pm - 11:11 pm
STL
-
YYZ
24h 25m2 stops
Multiple Airlines Logo
7:10 am - 10:34 pm
YYZ
-
STL
16h 24m1 stop
$248Multiple Airlines
Sun, Jan 11 - Fri, Jan 16
Multiple Airlines Logo
5:42 pm - 2:20 pm
STL
-
YYZ
19h 38m1 stop
Multiple Airlines Logo
5:15 pm - 11:33 pm
YYZ
-
STL
7h 18m1 stop
$258Multiple Airlines
Wed, Jan 28 - Wed, Feb 4
Multiple Airlines Logo
5:11 pm - 2:16 pm
STL
-
YYZ
20h 05m1 stop
Multiple Airlines Logo
3:40 pm - 6:51 am
YYZ
-
STL
16h 11m2 stops
$267Multiple Airlines
Tue, Jan 13 - Tue, Jan 20
Multiple Airlines Logo
8:22 pm - 11:20 pm
STL
-
YYZ
25h 58m2 stops
Multiple Airlines Logo
5:15 pm - 11:33 pm
YYZ
-
STL
7h 18m1 stop
$275Multiple Airlines
Wed, Jan 28 - Wed, Feb 4
Multiple Airlines Logo
5:11 pm - 12:11 am
STL
-
YYZ
30h 00m1 stop
Multiple Airlines Logo
5:15 pm - 10:23 am
YYZ
-
STL
18h 08m1 stop
$293Multiple Airlines
Fri, Jan 16 - Thu, Jan 22
Multiple Airlines Logo
5:42 pm - 2:20 pm
STL
-
YYZ
19h 38m1 stop
Multiple Airlines Logo
10:15 pm - 8:50 pm
YYZ
-
STL
47h 35m2 stops
$295Multiple Airlines
Sun, Jan 25 - Sat, Jan 31
Multiple Airlines Logo
5:11 pm - 2:16 pm
STL
-
YYZ
20h 05m1 stop
Multiple Airlines Logo
7:15 am - 11:33 pm
YYZ
-
STL
17h 18m1 stop
$304Multiple Airlines
Tue, Jan 13 - Tue, Jan 20
Multiple Airlines Logo
10:09 pm - 1:40 pm
STL
-
YYZ
38h 31m2 stops
Multiple Airlines Logo
5:15 pm - 10:23 am
YYZ
-
STL
18h 08m1 stop
$308Multiple Airlines
Fri, Jan 16 - Thu, Jan 22
Multiple Airlines Logo
7:52 am - 12:14 am
STL
-
YYZ
15h 22m1 stop
Multiple Airlines Logo
8:20 pm - 11:19 pm
YYZ
-
STL
27h 59m1 stop
$317Multiple Airlines
Fri, Mar 6 - Mon, Mar 9

Alaska Airlines flights from St. Louis to Toronto Pearson Intl Airport

Our best Alaska Airlines deals on St. Louis to Toronto Pearson Intl Airport flight tickets
Alaska Airlines
Jan 13
STL2:50 pmLambert-St Louis
23h 45m
1 stop
YYZ3:35 pmToronto Pearson Intl
Jan 20
YYZ4:45 pmToronto Pearson Intl
22h 09m
1 stop
STL1:54 pmLambert-St Louis
$448
Find similar
Alaska Airlines
Jan 28
STL2:50 pmLambert-St Louis
23h 45m
1 stop
YYZ3:35 pmToronto Pearson Intl
Feb 4
YYZ4:45 pmToronto Pearson Intl
22h 09m
1 stop
STL1:54 pmLambert-St Louis
$466
Find similar
Alaska Airlines
Jan 26
STL2:50 pmLambert-St Louis
23h 45m
1 stop
YYZ3:35 pmToronto Pearson Intl
Jan 29
YYZ4:45 pmToronto Pearson Intl
31h 01m
1 stop
STL10:46 pmLambert-St Louis
$476
Find similar

United Airlines flights from St. Louis to Toronto Pearson Intl Airport

Our best United Airlines deals on St. Louis to Toronto Pearson Intl Airport flight tickets
United Airlines
Jan 3
STL6:35 pmLambert-St Louis
4h 24m
1 stop
YYZ11:59 pmToronto Pearson Intl
Jan 8
YYZ9:00 amToronto Pearson Intl
6h 30m
1 stop
STL2:30 pmLambert-St Louis
$494
Find similar
United Airlines
Jan 16
STL8:05 amLambert-St Louis
8h 44m
2 stops
YYZ5:49 pmToronto Pearson Intl
Jan 18
YYZ11:00 amToronto Pearson Intl
4h 30m
1 stop
STL2:30 pmLambert-St Louis
$503
Find similar
United Airlines
Jan 16
STL9:57 amLambert-St Louis
8h 20m
2 stops
YYZ7:17 pmToronto Pearson Intl
Jan 18
YYZ7:30 amToronto Pearson Intl
8h 00m
2 stops
STL2:30 pmLambert-St Louis
$509
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Toronto Pearson Intl Airport 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 15, 2025.
Use the filters below to find and compare flights from St. Louis to Toronto Pearson Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 1/11

9:46 pm-6:20 am

1 stop31h 34m

Toronto Pearson Intl

Fri 1/16

7:10 am-10:34 pm

1 stop16h 24m

$245

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 1/11

9:46 pm-11:11 pm

2 stops24h 25m

Toronto Pearson Intl

Fri 1/16

7:10 am-10:34 pm

1 stop16h 24m

$248

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 1/28

5:42 pm-2:20 pm

1 stop19h 38m

Toronto Pearson Intl

Wed 2/4

5:15 pm-11:33 pm

1 stop7h 18m

$258

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 1/13

5:11 pm-2:16 pm

1 stop20h 05m

Toronto Pearson Intl

Tue 1/20

3:40 pm-6:51 am

2 stops16h 11m

$267

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 1/28

8:22 pm-11:20 pm

2 stops25h 58m

Toronto Pearson Intl

Wed 2/4

5:15 pm-11:33 pm

1 stop7h 18m

$275

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 1/16

5:11 pm-12:11 am

1 stop30h 00m

Toronto Pearson Intl

Thu 1/22

5:15 pm-10:23 am

1 stop18h 08m

$293

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 1/25

5:42 pm-2:20 pm

1 stop19h 38m

Toronto Pearson Intl

Sat 1/31

10:15 pm-8:50 pm

2 stops47h 35m

$295

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 1/13

5:11 pm-2:16 pm

1 stop20h 05m

Toronto Pearson Intl

Tue 1/20

7:15 am-11:33 pm

1 stop17h 18m

$304

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 1/16

10:09 pm-1:40 pm

2 stops38h 31m

Toronto Pearson Intl

Thu 1/22

5:15 pm-10:23 am

1 stop18h 08m

$308

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 3/6

7:52 am-12:14 am

1 stop15h 22m

Toronto Pearson Intl

Mon 3/9

8:20 pm-11:19 pm

1 stop27h 59m

$317

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 Pearson Intl Airport

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 Pearson Intl Airport?

What is the cheapest month to fly to Toronto Pearson Intl Airport?

The cheapest month to fly to Toronto Pearson Intl Airport from St. Louis is in May. Flight prices, which tend to average around $408, are often lower during this time because this is during the off-season. If you don’t want to visit Toronto Pearson Intl Airport in May, then you should wait until July to fly from St. Louis, when ticket prices are also cheap, with an average price of $435.

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

The cheapest day to depart from St. Louis to Toronto Pearson Intl Airport is on a Tuesday when prices can be found for as low as $815. The most expensive day to fly to Toronto Pearson Intl Airport is Friday, with ticket prices averaging around $988.

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

Flying to Toronto Pearson Intl Airport from St. Louis in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $887 when looking at flights departing in the afternoon. Flights at noon are often more expensive with an average ticket price of $1,180.

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

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

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

You are more likely to see cheaper flights to Toronto Pearson Intl Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Toronto Pearson Intl Airport for around $508 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Toronto Pearson Intl Airport from St. Louis for as low as $221 on momondo.

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

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

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

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

As of December 2025, prices for St. Louis to Toronto Pearson Intl Airport flights are approximately 4% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Toronto Pearson Intl Airport

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

Cheap St. Louis to Toronto Pearson Intl Airport (STL to YYZ) flight deals and tips

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

Best Price Found

$479

Fastest flight time

1h 57m

Direct flights

Tue, Wed, Thu, Fri, Sat and Sun
The best one-way flight to Toronto Pearson Intl Airport from St. Louis in the past 72 hours is $479. The best round-trip flight deal from St. Louis to Toronto Pearson Intl Airport found on momondo in the last 72 hours is $541.
The fastest flight from St. Louis to Toronto Pearson Intl Airport takes 1h 57m
Direct flights go from St. Louis to Toronto Pearson Intl Airport on Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is Air Canada.
Search flight deals

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

    A flight from Lambert-St Louis to Toronto Pearson Intl will travel around 650.6 mi. In terms of flight time, this usually takes a little over 1h 57m.

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Toronto Pearson Intl Airport.

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

    The required travel and health documents for your Toronto Pearson Intl Airport 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 Pearson Intl Airport. 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 Pearson Intl Airport?

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

Best airlines flying from St. Louis to Toronto Pearson Intl Airport

Compare and see reviews for airlines that fly from St. Louis to Toronto Pearson Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $199Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
Air CanadaPriceFrom $220Free CancellationRating
7.1
10,525 reviews
Search Air Canada flights
American AirlinesPriceFrom $270Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights

  • United Airlines Flights From St. Louis to Toronto Pearson Intl Airport

    United Airlines operates around 6 flights from St. Louis to Toronto Pearson Intl Airport every week. The average price of these flights found in the last 72 hours has been $503, but momondo users have found United Airlines deals from St. Louis to Toronto Pearson Intl Airport from as low as $199 round-trip. United Airlines has been scored 7.4/10 in 9,092 reviews.

  • Air Canada Flights From St. Louis to Toronto Pearson Intl Airport

    Air Canada (7.1/10 from 10,525 reviews) operates around 6 flights from St. Louis to Toronto Pearson Intl Airport in any given week. The average Air Canada airfare for this route is around $534, with deals from around $220 rare but found on momondo. Referenced prices are for round-trip St. Louis to Toronto Pearson Intl Airport flight searches in the last 72 hours.

Traveling to a place near Toronto?

Book flights to Toronto if you plan to visit one of these locations
Niagara Falls
Mississauga
Niagara-on-the-Lake
Brampton
Markham
Vaughan
Richmond Hill
Oakville
Kitchener
Barrie
Cambridge
Guelph
Burlington
Peterborough
Whitby
Collingwood
Milton
Orillia
Stratford
St. Catharines

Why use momondo?

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

Finding the right flight to Toronto from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Toronto quick and easy, saving you time and money.

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

All flight searches from St. Louis to Toronto on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Toronto from St. Louis.

I’m not ready to book a flight from St. Louis to Toronto right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Toronto, momondo offers a useful price alert feature which will track prices for flights to Toronto from St. Louis and alert you when they change.

An easier way to manage your Toronto Pearson Intl Airport 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.
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