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Cheap flights from Toronto to St. Louis from $188

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Toronto to St. Louis departing on 9/3. 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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Find the cheapest flights from Toronto to St. Louis

Cheap round-trip flights

American Airlines Logo
4:44 pm - 11:56 pmYYZ-STL
8h 12m1 stop
American Airlines Logo
6:00 am - 4:04 pmSTL-YYZ
9h 04m1 stop
$320American Airlines
Find Deal
Sat, Nov 8 - Sat, Nov 15
American Airlines Logo
1:15 pm - 8:26 pmYYZ-STL
8h 11m1 stop
American Airlines Logo
7:16 am - 5:40 pmSTL-YYZ
9h 24m1 stop
$325American Airlines
Find Deal
Tue, Oct 21 - Mon, Oct 27
United Airlines Logo
3:30 pm - 10:45 pmYYZ-STL
8h 15m1 stop
United Airlines Logo
6:30 am - 4:01 pmSTL-YYZ
8h 31m1 stop
$400United Airlines
Find Deal
Mon, Nov 24 - Fri, Nov 28
Air Canada Logo
6:35 pm - 7:45 pmYYZ-STL
2h 10mnonstop
Air Canada Logo
9:15 am - 12:15 pmSTL-YYZ
2h 00mnonstop
$430Air Canada
Find Deal
Sat, Aug 23 - Sun, Aug 24
Air Canada Logo
2:15 pm - 3:21 pmYYZ-STL
2h 06mnonstop
Air Canada Logo
9:15 am - 12:15 pmSTL-YYZ
2h 00mnonstop
$433Air Canada
Find Deal
Fri, Aug 22 - Mon, Aug 25
Logo
9:00 am - 2:33 pmYYZ-STL
6h 33m1 stop
Logo
9:50 am - 9:08 pmSTL-YYZ
10h 18m2 stops
$454
Find Deal
Fri, Aug 22 - Thu, Aug 28
United Airlines Logo
12:45 pm - 7:27 pmYYZ-STL
7h 42m2 stops
United Airlines Logo
9:17 am - 5:19 pmSTL-YYZ
7h 02m2 stops
$456United Airlines
Find Deal
Fri, Sep 5 - Tue, Sep 9
Logo
9:00 pm - 3:44 pmYYZ-STL
19h 44m1 stop
Logo
4:05 pm - 7:06 pmSTL-YYZ
2h 01mnonstop
$463
Find Deal
Tue, Oct 21 - Mon, Oct 27
WestJet Logo
10:10 am - 1:20 pmYYZ-STL
4h 10m1 stop
WestJet Logo
6:00 am - 6:03 pmSTL-YYZ
11h 03m2 stops
$470WestJet
Find Deal
Tue, Sep 9 - Thu, Sep 11
WestJet Logo
8:00 pm - 9:15 amYYZ-STL
14h 15m2 stops
WestJet Logo
6:40 am - 5:23 pmSTL-YYZ
9h 43m1 stop
$489WestJet
Find Deal
Tue, Sep 9 - Thu, Sep 11

Air Canada flights from Toronto to St. Louis

Our best Air Canada deals on Toronto to St. Louis flight tickets
Air Canada
Aug 23
YYZ6:35 pmToronto Pearson Intl
2h 10m
STL7:45 pmLambert-St Louis
Aug 24
STL9:15 amLambert-St Louis
2h 00m
YYZ12:15 pmToronto Pearson Intl
$430
Find similar
Air Canada
Aug 22
YYZ2:15 pmToronto Pearson Intl
2h 06m
STL3:21 pmLambert-St Louis
Aug 25
STL9:15 amLambert-St Louis
2h 00m
YYZ12:15 pmToronto Pearson Intl
$433
Find similar
Air Canada
Aug 25
YYZ6:35 pmToronto Pearson Intl
2h 10m
STL7:45 pmLambert-St Louis
Aug 27
STL9:15 amLambert-St Louis
2h 00m
YYZ12:15 pmToronto Pearson Intl
$442
Find similar

American Airlines flights from Toronto to St. Louis

Our best American Airlines deals on Toronto to St. Louis flight tickets
American Airlines
Nov 8
YYZ4:44 pmToronto Pearson Intl
8h 12m
1 stop
STL11:56 pmLambert-St Louis
Nov 15
STL6:00 amLambert-St Louis
9h 04m
1 stop
YYZ4:04 pmToronto Pearson Intl
$320
Find similar
American Airlines
Oct 21
YYZ1:15 pmToronto Pearson Intl
8h 11m
1 stop
STL8:26 pmLambert-St Louis
Oct 27
STL7:16 amLambert-St Louis
9h 24m
1 stop
YYZ5:40 pmToronto Pearson Intl
$325
Find similar
American Airlines
Sep 15
YYZ1:15 pmToronto Pearson Intl
8h 10m
1 stop
STL8:25 pmLambert-St Louis
Sep 22
STL6:05 amLambert-St Louis
7h 26m
1 stop
YYZ2:31 pmToronto Pearson Intl
$327
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Toronto to St. Louis 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 2, 2025.
Use the filters below to find and compare flights from Toronto to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 11/8

4:44 pm-11:56 pm

1 stop8h 12m

Lambert-St Louis

Sat 11/15

6:00 am-4:04 pm

1 stop9h 04m

$320

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 10/21

1:15 pm-8:26 pm

1 stop8h 11m

Lambert-St Louis

Mon 10/27

7:16 am-5:40 pm

1 stop9h 24m

$325

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 11/24

3:30 pm-10:45 pm

1 stop8h 15m

Lambert-St Louis

Fri 11/28

6:30 am-4:01 pm

1 stop8h 31m

$400

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 8/23

6:35 pm-7:45 pm

Nonstop2h 10m

Lambert-St Louis

Sun 8/24

9:15 am-12:15 pm

Nonstop2h 00m

$430

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 8/22

2:15 pm-3:21 pm

Nonstop2h 06m

Lambert-St Louis

Mon 8/25

9:15 am-12:15 pm

Nonstop2h 00m

$433

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 8/22

9:00 am-2:33 pm

1 stop6h 33m

Lambert-St Louis

Thu 8/28

9:50 am-9:08 pm

2 stops10h 18m

$454

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 9/5

12:45 pm-7:27 pm

2 stops7h 42m

Lambert-St Louis

Tue 9/9

9:17 am-5:19 pm

2 stops7h 02m

$456

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 10/21

9:00 pm-3:44 pm

1 stop19h 44m

Lambert-St Louis

Mon 10/27

4:05 pm-7:06 pm

Nonstop2h 01m

$463

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 9/9

10:10 am-1:20 pm

1 stop4h 10m

Lambert-St Louis

Thu 9/11

6:00 am-6:03 pm

2 stops11h 03m

$470

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 9/9

8:00 pm-9:15 am

2 stops14h 15m

Lambert-St Louis

Thu 9/11

6:40 am-5:23 pm

1 stop9h 43m

$489

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 St. Louis from

How to get the cheapest flight ticket from Toronto to St. Louis

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 Toronto and St. Louis?

What is the cheapest month to fly to St. Louis?

In general, June is the cheapest month to fly from Toronto to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $372. The month of November is another great option to travel to St. Louis, with average flight prices from Toronto averaging around $464.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Saturday when prices can be found for as low as $392. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $541. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Toronto in the morning is the least expensive time of day to depart. momondo users have found prices as low as $326 when looking at flights departing in the morning. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $488 per ticket.

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

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

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Toronto when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $487 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Toronto for as low as $360 on momondo.

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

There are 3 cabin classes available to choose from on Toronto to Lambert-St Louis 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 Toronto to St. Louis flights?

You could potentially save up to 11% on your flight if you consider stops on a Toronto to St. Louis flight.

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

As of August 2025, prices for Toronto to St. Louis flights are approximately 2% more expensive when compared to flights at the same time last year.

When to book flights from Toronto to St. Louis

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

Cheap Toronto to St. Louis (YTO to STL) flight deals and tips

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

Best Price Found

$188

Fastest flight time

2h 03m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Toronto in the past 72 hours is $188. The best round-trip flight deal from Toronto to St. Louis found on momondo in the last 72 hours is $320.
The fastest flight from Toronto to St. Louis takes 2h 03m
Direct flights go from Toronto to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

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

    Lambert-St Louis is 659.9 mi away from Toronto. A reasonable flight in good conditions will take 2h 03m.

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

    Prices for flights from Toronto to Lambert-St Louis Airport are refreshed on a daily basis.

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

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

    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 Toronto to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Toronto to St. Louis?

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

Best airlines flying from Toronto to St. Louis

Compare and see reviews for airlines that fly from Toronto to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $324Free CancellationRating
7.1
9,855 reviews
Search Air Canada flights

  • Air Canada Flights From Toronto to St. Louis

    Air Canada flight deals from Toronto to St. Louis start from $324 round-trip. Over the 14 Air Canada flights for this route in a normal week, average airfare is usually $492 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
Shrewsbury
Grafton

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Toronto to St. Louis. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to St. Louis from Toronto with this policy.

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

Once all potential Toronto to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Toronto to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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