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Cheap flights from Toronto to St. Louis from C$ 210

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 29/10. 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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Find the cheapest flights from Toronto to St. Louis

Cheap round-trip flights

Logo
8:05 p.m. - 3:56 p.m.YYZ-STL
20h 51m1 stop
Logo
9:59 p.m. - 10:52 p.m.STL-YYZ
23h 53m2 stops
C$ 364
Find Deal
Fri, 17 Oct - Mon, 20 Oct
Logo
9:45 a.m. - 1:57 p.m.YYZ-STL
29h 12m1 stop
Logo
9:07 p.m. - 7:55 p.m.STL-YYZ
21h 48m1 stop
C$ 393
Find Deal
Thu, 6 Nov - Mon, 10 Nov
Logo
9:45 a.m. - 1:57 p.m.YYZ-STL
29h 12m1 stop
Logo
6:22 p.m. - 2:40 p.m.STL-YYZ
43h 18m2 stops
C$ 397
Find Deal
Thu, 30 Oct - Thu, 6 Nov
American Airlines Logo
10:57 a.m. - 9:19 p.m.YYZ-STL
11h 22m1 stop
American Airlines Logo
7:58 p.m. - 10:52 a.m.STL-YYZ
13h 54m1 stop
C$ 507American Airlines
Find Deal
Mon, 17 Nov - Sat, 22 Nov
American Airlines Logo
3:29 p.m. - 10:55 p.m.YYZ-STL
8h 26m1 stop
American Airlines Logo
6:00 a.m. - 4:34 p.m.STL-YYZ
9h 34m1 stop
C$ 520American Airlines
Find Deal
Wed, 15 Oct - Tue, 21 Oct
Air Canada Logo
2:15 p.m. - 3:18 p.m.YYZ-STL
2h 03mdirect
Air Canada Logo
4:05 p.m. - 7:06 p.m.STL-YYZ
2h 01mdirect
C$ 559Air Canada
Find Deal
Sat, 25 Oct - Sun, 2 Nov
Air Canada Logo
3:00 p.m. - 7:57 p.m.YYZ-STL
5h 57m1 stop
Air Canada Logo
9:15 a.m. - 12:11 p.m.STL-YYZ
1h 56mdirect
C$ 567Air Canada
Find Deal
Sat, 4 Oct - Mon, 6 Oct
United Airlines Logo
9:00 a.m. - 2:25 p.m.YYZ-STL
6h 25m1 stop
United Airlines Logo
5:24 p.m. - 11:59 p.m.STL-YYZ
5h 35m1 stop
C$ 587United Airlines
Find Deal
Tue, 25 Nov - Sat, 29 Nov
United Airlines Logo
2:15 p.m. - 3:18 p.m.YYZ-STL
2h 03mdirect
United Airlines Logo
9:20 a.m. - 4:43 p.m.STL-YYZ
6h 23m1 stop
C$ 653United Airlines
Find Deal
Wed, 15 Oct - Tue, 21 Oct
WestJet Logo
6:15 a.m. - 9:37 a.m.YYZ-STL
4h 22m1 stop
WestJet Logo
6:00 a.m. - 6:03 p.m.STL-YYZ
11h 03m2 stops
C$ 673WestJet
Find Deal
Wed, 15 Oct - Tue, 21 Oct

American Airlines flights from Toronto to St. Louis

Our best American Airlines deals on Toronto to St. Louis flight tickets
American Airlines
17 Nov
YYZ10:57 a.m.Toronto Pearson Intl
11h 22m
1 stop
STL9:19 p.m.Lambert-St Louis
22 Nov
STL7:58 p.m.Lambert-St Louis
13h 54m
1 stop
YYZ10:52 a.m.Toronto Pearson Intl
C$ 507
Find similar
American Airlines
15 Oct
YYZ3:29 p.m.Toronto Pearson Intl
8h 26m
1 stop
STL10:55 p.m.Lambert-St Louis
21 Oct
STL6:00 a.m.Lambert-St Louis
9h 34m
1 stop
YYZ4:34 p.m.Toronto Pearson Intl
C$ 520
Find similar
American Airlines
11 Oct
YYZ6:30 a.m.Toronto Pearson Intl
10h 34m
1 stop
STL4:04 p.m.Lambert-St Louis
18 Oct
STL6:00 a.m.Lambert-St Louis
9h 34m
1 stop
YYZ4:34 p.m.Toronto Pearson Intl
C$ 537
Find similar

United Airlines flights from Toronto to St. Louis

Our best United Airlines deals on Toronto to St. Louis flight tickets
United Airlines
25 Nov
YYZ9:00 a.m.Toronto Pearson Intl
6h 25m
1 stop
STL2:25 p.m.Lambert-St Louis
29 Nov
STL5:24 p.m.Lambert-St Louis
5h 35m
1 stop
YYZ11:59 p.m.Toronto Pearson Intl
C$ 587
Find similar
United Airlines
15 Oct
YYZ2:15 p.m.Toronto Pearson Intl
2h 03m
STL3:18 p.m.Lambert-St Louis
21 Oct
STL9:20 a.m.Lambert-St Louis
6h 23m
1 stop
YYZ4:43 p.m.Toronto Pearson Intl
C$ 653
Find similar
United Airlines
2 Oct
YYZ2:15 p.m.Toronto Pearson Intl
2h 03m
STL3:18 p.m.Lambert-St Louis
5 Oct
STL9:15 a.m.Lambert-St Louis
1h 56m
YYZ12:11 p.m.Toronto Pearson Intl
C$ 655
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 96,600 searches. Data last updated 15 September 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

Fri 17/10

8:05 p.m.-3:56 p.m.

1 stop20h 51m

Lambert-St Louis

Mon 20/10

9:59 p.m.-10:52 p.m.

2 stops23h 53m

C$ 364

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 6/11

9:45 a.m.-1:57 p.m.

1 stop29h 12m

Lambert-St Louis

Mon 10/11

9:07 p.m.-7:55 p.m.

1 stop21h 48m

C$ 393

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 30/10

9:45 a.m.-1:57 p.m.

1 stop29h 12m

Lambert-St Louis

Thu 6/11

6:22 p.m.-2:40 p.m.

2 stops43h 18m

C$ 397

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 17/11

10:57 a.m.-9:19 p.m.

1 stop11h 22m

Lambert-St Louis

Sat 22/11

7:58 p.m.-10:52 a.m.

1 stop13h 54m

C$ 507

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 15/10

3:29 p.m.-10:55 p.m.

1 stop8h 26m

Lambert-St Louis

Tue 21/10

6:00 a.m.-4:34 p.m.

1 stop9h 34m

C$ 520

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 25/10

2:15 p.m.-3:18 p.m.

Nonstop2h 03m

Lambert-St Louis

Sun 2/11

4:05 p.m.-7:06 p.m.

Nonstop2h 01m

C$ 559

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 4/10

3:00 p.m.-7:57 p.m.

1 stop5h 57m

Lambert-St Louis

Mon 6/10

9:15 a.m.-12:11 p.m.

Nonstop1h 56m

C$ 567

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 25/11

9:00 a.m.-2:25 p.m.

1 stop6h 25m

Lambert-St Louis

Sat 29/11

5:24 p.m.-11:59 p.m.

1 stop5h 35m

C$ 587

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 15/10

2:15 p.m.-3:18 p.m.

Nonstop2h 03m

Lambert-St Louis

Tue 21/10

9:20 a.m.-4:43 p.m.

1 stop6h 23m

C$ 653

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 15/10

6:15 a.m.-9:37 a.m.

1 stop4h 22m

Lambert-St Louis

Tue 21/10

6:00 a.m.-6:03 p.m.

2 stops11h 03m

C$ 673

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?

The month of June is, on average, the cheapest month to fly to St. Louis from Toronto, with most prices found around C$ 515. If you don’t want to visit St. Louis in June, then you should wait until August to fly from Toronto, when ticket prices are also cheap, with an average price of C$ 550.

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

Our data shows that Thursday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as C$ 589. The most expensive day to fly to St. Louis is Monday, with ticket prices averaging around C$ 766.

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

The cheapest time of day to fly to St. Louis is in the morning when flights can be purchased for as low as C$ 542. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 692 on average. Flights to St. Louis from Toronto at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 C$ 683 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 C$ 498 on momondo.

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

There is only 1 cabin class 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?

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

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

As of September 2025, prices for Toronto to St. Louis flights are approximately 2% cheaper 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

C$ 876

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 C$ 876. The best round-trip flight deal from Toronto to St. Louis found on momondo in the last 72 hours is C$ 542.
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?

    Toronto and Lambert-St Louis are 1062.1 km apart from one another. By plane, this route typically takes 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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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
American AirlinesPriceFrom C$ 431Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Air CanadaPriceFrom C$ 472Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
DeltaPriceFrom C$ 475Free CancellationRating
7.9
7,954 reviews
Search Delta flights
United AirlinesPriceFrom C$ 476Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
WestJetPriceFrom C$ 559Free CancellationRating
7.2
3,091 reviews
Search WestJet flights

  • United Airlines Flights From Toronto to St. Louis

    Across 14 United Airlines flights from Toronto to St. Louis this week, the average price was C$ 495, with the best United Airlines deals starting from C$ 344 round-trip. 8,929 users have rated United Airlines on momondo, with an average score of 7.4/10.

  • Air Canada Flights From Toronto to St. Louis

    Another popular option for Toronto to St. Louis flights is Air Canada (7.1/10, 10,000 ratings). Air Canada flies from Toronto to St. Louis around 14 times per week, with deals starting from C$ 341 round-trip and rising to an average price of around C$ 490.

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Chesterfield
Collinsville
Litchfield

Why use momondo?

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

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 St. Louis from Toronto.

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

Yes. momondo allows you to filter the results for Toronto to St. Louis flights to just show those with flexible booking policies.

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

Once you have performed a search for Toronto to St. Louis 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 Toronto to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Toronto are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your St. Louis trip

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