How long is the flight from Toronto to St. Louis?

For as low as C$ 532, United Airlines can have you in St. Louis from Toronto in 11h 22m. The distance from Toronto to St. Louis is about 1051 km. This flight may include one or multiple stops.

What are the cheapest airlines flying from Toronto to St. Louis round-trip?

Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at C$ 431. Additional round-trip tickets that might be worth considering are offered by Air Canada and Delta, with the lowest prices starting at C$ 473 and C$ 476, respectively. American Airlines is currently priced 35% below the average price you’ll pay for this route.

What is the cheapest day to fly from Toronto to St. Louis?

Travelers seeking maximum savings on their Toronto to St. Louis flight should consider departing on Thursday mornings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

What are the cheapest flights from Toronto to St. Louis?

While on average a flight from Toronto to St. Louis is generally C$ 1,165, our data shows the cheapest flight currently is C$ 436. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 388 for that flight.

What are the most reliable airlines from Toronto to St. Louis?

The top 3 most reliable airlines when flying from Toronto to St. Louis are Air Canada (75%), Jazz (75%) and United Airlines (75%).

What are the most popular airlines that fly from Toronto to St. Louis?

Before booking your flight from Toronto to St. Louis check out the most popular airlines for this route: American Airlines, Air Canada or Delta.

What is the cheapest day to fly round-trip from Toronto to St. Louis?

Flying to your destination on a Sunday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to St. Louis. Check prices with Cheapflights to find a great deal for your trip.

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

Travellers have found it’s best to book a flight 47 days in advance to save up to 224% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 47 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Toronto to St. Louis 1-2 weeks in advance for as low as C$ 477, or C$ 1,476 for flights within the next 24 hours.

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

June can be a great time to fly to St. Louis from Toronto with a flight ticket averaging about C$ 670. Cheapflights users have found deals in the month of June for as cheap as C$ 413. The most expensive prices can be found in the month of January.

What airport do you fly into for flights to St. Louis from Toronto?

If you book a flight to St. Louis from Toronto, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 20.4 km from the centre of St. Louis. There are 4 flights from Toronto to Lambert-St Louis per day from 5 different airlines.

Can I find deals for flights from Toronto to St. Louis that include hotel bookings?

Yes. In addition to deals on Toronto to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Toronto to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Toronto to St. Louis.

Can I find deals for business class flights from Toronto to St. Louis?

Yes. Cheapflights offers flight deals from Toronto to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 252+ Cheap Flights from Toronto to St. Louis

Q: How much does it cost to fly round-trip from Toronto to St. Louis?

Airfare is below average for this route at the moment. Toronto to St. Louis flights typically cost between C$ 624 and C$ 733 in November. The cheapest round-trip price found within the last 3 days was C$ 362 on Multiple Airlines (6 Nov-10 Nov).

Cheapflights Tip: The best prices from Toronto to Lambert-St Louis are usually found in June or November, booked 65 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

Cheap flight deals from Toronto to St. Louis

Round-trip from	C$ 362
One-way from	C$ 252
Popular in	January
Cheapest in	June
Average price	C$ 660
Good round-trip deal	C$ 542 or less
Good one-way deal	C$ 1,023 or less

6/11-10/11
2 total stops
54h 05m total
Toronto to St. Louis

Search Deals

8/10
3 total stops
23h 07m total
Toronto to St. Louis

Search Deals

Highest demand for flights based on searches. 6% potential increase in price (C$ 59 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Price to beat on a round-trip flight from Toronto (YTO) to Lambert-St Louis.

Search Deals

Price to beat on a one-way flight from Toronto (YTO) to Lambert-St Louis.

Search Deals

Find flight deals from Toronto to St. Louis

Cheapest flights from Toronto to St. Louis
Explore the most affordable flight options available from Toronto to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Thu 6/119:45 a.m.YYZ - STL

1 stop29h 12mMultiple Airlines

Mon 10/119:07 p.m.STL - YYZ

1 stop24h 53mMultiple Airlines

Deal found 11/9C$ 362

Thu 6/119:45 a.m.YYZ - STL

1 stop29h 12mMultiple Airlines

Sat 8/114:51 p.m.STL - YYZ

1 stop12h 29mMultiple Airlines

Deal found 11/9C$ 366

Fri 7/119:45 a.m.YYZ - STL

1 stop11h 27mMultiple Airlines

Mon 10/112:42 p.m.STL - YYZ

2 stops21h 58mMultiple Airlines

Deal found 11/9C$ 382

Wed 15/106:30 a.m.YYZ - STL

1 stop28h 32mMultiple Airlines

Mon 20/109:59 p.m.STL - YYZ

2 stops21h 53mMultiple Airlines

Deal found 10/9C$ 388

Sun 26/109:35 a.m.YYZ - STL

2 stops24h 57mMultiple Airlines

Thu 30/1010:57 a.m.STL - YYZ

1 stop26h 43mMultiple Airlines

Deal found 10/9C$ 392

Wed 15/101:15 p.m.YYZ - STL

1 stop11h 39mAmerican Airlines

Tue 21/106:00 a.m.STL - YYZ

1 stop7h 30mAmerican Airlines

Deal found 9/9C$ 412

Tue 7/101:15 p.m.YYZ - STL

1 stop8h 11mAmerican Airlines

Tue 14/106:00 a.m.STL - YYZ

1 stop9h 34mAmerican Airlines

Deal found 9/9C$ 442

Wed 1/109:35 a.m.YYZ - STL

1 stop25h 05mMultiple Airlines

Sun 5/104:00 p.m.STL - YYZ

2 stops27h 55mMultiple Airlines

Deal found 11/9C$ 443

Fri 7/119:45 a.m.YYZ - STL

1 stop11h 27mMultiple Airlines

Sun 9/1111:23 a.m.STL - YYZ

2 stops17h 57mMultiple Airlines

Deal found 11/9C$ 460

Thu 6/117:55 p.m.YYZ - STL

1 stop19h 02mMultiple Airlines

Sun 9/1111:23 a.m.STL - YYZ

2 stops17h 57mMultiple Airlines

Deal found 11/9C$ 470

Best flights from Toronto to St. Louis
Discover carefully curated flight deals from Toronto to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 11 September 2025.

Fri 7/119:45 a.m.YYZ - STL

1 stop11h 27mMultiple Airlines

Mon 10/112:42 p.m.STL - YYZ

2 stops21h 58mMultiple Airlines

Deal found 11/9C$ 382

Tue 7/107:00 a.m.YYZ - STL

3 stops14h 46mUnited Airlines

Tue 14/106:00 a.m.STL - YYZ

1 stop6h 47mUnited Airlines

Deal found 9/9C$ 528

Mon 17/1110:57 a.m.YYZ - STL

1 stop11h 22mAmerican Airlines

Sat 22/117:58 p.m.STL - YYZ

1 stop13h 54mAmerican Airlines

Deal found 11/9C$ 532

Sat 8/116:00 a.m.YYZ - STL

1 stop11h 43mDelta

Sun 9/115:12 p.m.STL - YYZ

1 stop5h 47mDelta

Deal found 11/9C$ 557

Fri 3/102:15 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Sun 5/109:15 a.m.STL - YYZ

Nonstop1h 56mAir Canada

Deal found 11/9C$ 561

Mon 20/1010:40 a.m.YYZ - STL

2 stops23h 27mMultiple Airlines

Thu 23/1010:57 a.m.STL - YYZ

1 stop8h 58mMultiple Airlines

Deal found 11/9C$ 489

Sat 11/1011:50 a.m.YYZ - STL

1 stop13h 08mAmerican Airlines

Sat 18/106:00 a.m.STL - YYZ

1 stop9h 34mAmerican Airlines

Deal found 11/9C$ 542

Wed 15/102:15 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Mon 20/109:15 a.m.STL - YYZ

Nonstop1h 56mAir Canada

Deal found 10/9C$ 561

Tue 14/106:00 a.m.YYZ - STL

1 stop11h 43mDelta

Thu 16/106:00 a.m.STL - YYZ

1 stop5h 10mDelta

Deal found 11/9C$ 568

Sat 18/102:15 p.m.YYZ - STL

Nonstop2h 03mUnited Airlines

Wed 22/1012:25 p.m.STL - YYZ

1 stop10h 33mUnited Airlines

Deal found 9/9C$ 570

Sat 25/102:15 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Sun 2/114:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Deal found 11/9C$ 561

Sun 26/103:35 p.m.YYZ - STL

1 stop5h 48mDelta

Wed 29/109:31 a.m.STL - YYZ

1 stop10h 11mDelta

Deal found 10/9C$ 570

Direct flights from Toronto to St. Louis
Explore direct flight options from Toronto to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated 11 September 2025.

Sat 18/102:15 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Wed 22/104:05 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Deal found 9/9C$ 493

Wed 15/102:15 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Tue 21/109:15 a.m.STL - YYZ

Nonstop1h 56mAir Canada

Deal found 9/9C$ 520

Thu 20/112:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Sun 23/114:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Deal found 10/9C$ 543

Thu 6/112:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Sun 9/114:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Deal found 11/9C$ 561

Tue 14/106:40 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Thu 16/109:15 a.m.STL - YYZ

Nonstop1h 56mAir Canada

Deal found 11/9C$ 579

Tue 3/32:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Wed 4/34:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Deal found 9/9C$ 604

Tue 7/102:15 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Tue 14/104:05 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Deal found 9/9C$ 624

Wed 26/112:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Mon 1/124:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Deal found 10/9C$ 636

Sat 11/102:15 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Sat 18/104:05 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Deal found 11/9C$ 672

Last-minute flights from Toronto to St. Louis
Discover last-minute flight deals from Toronto to St. Louis. Data last updated 11 September 2025 and is based on user searches.

Wed 1/109:35 a.m.YYZ - STL

1 stop25h 05mMultiple Airlines

Sun 5/104:00 p.m.STL - YYZ

2 stops27h 55mMultiple Airlines

Deal found 11/9C$ 443

Fri 3/109:50 a.m.YYZ - STL

1 stop11h 47mMultiple Airlines

Sun 5/104:00 p.m.STL - YYZ

2 stops27h 55mMultiple Airlines

Deal found 11/9C$ 495

Tue 7/101:15 p.m.YYZ - STL

1 stop8h 11mAmerican Airlines

Tue 14/106:00 a.m.STL - YYZ

1 stop9h 34mAmerican Airlines

Deal found 9/9C$ 442

Wed 15/106:30 a.m.YYZ - STL

1 stop28h 32mMultiple Airlines

Mon 20/109:59 p.m.STL - YYZ

2 stops21h 53mMultiple Airlines

Deal found 10/9C$ 388

Wed 15/101:15 p.m.YYZ - STL

1 stop11h 39mAmerican Airlines

Tue 21/106:00 a.m.STL - YYZ

1 stop7h 30mAmerican Airlines

Deal found 9/9C$ 412

Sat 18/101:35 p.m.YYZ - STL

1 stop21h 27mMultiple Airlines

Wed 22/107:52 p.m.STL - YYZ

2 stops25h 48mMultiple Airlines

Deal found 9/9C$ 479

Sat 18/102:15 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Wed 22/104:05 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Deal found 9/9C$ 493

Sat 18/1011:00 a.m.YYZ - STL

1 stop9h 23mAmerican Airlines

Wed 22/106:00 a.m.STL - YYZ

1 stop9h 34mAmerican Airlines

Deal found 9/9C$ 497

Mon 20/1010:40 a.m.YYZ - STL

2 stops23h 27mMultiple Airlines

Thu 23/1010:57 a.m.STL - YYZ

1 stop8h 58mMultiple Airlines

Deal found 11/9C$ 489

Sun 26/109:35 a.m.YYZ - STL

2 stops24h 57mMultiple Airlines

Thu 30/1010:57 a.m.STL - YYZ

1 stop26h 43mMultiple Airlines

Deal found 10/9C$ 392

One-way flights from Toronto to St. Louis
Search for one-way flight options from Toronto to St. Louis. Find affordable one-way fares based on user searches. Data last updated 11 September 2025.

Wed 8/1011:00 a.m.YYZ - STL

3 stops23h 07mMultiple Airlines

Deal found 11/9C$ 252

Wed 8/102:15 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Deal found 11/9C$ 295

Wed 8/101:15 p.m.YYZ - STL

1 stop8h 11mAmerican Airlines

Deal found 11/9C$ 298

Wed 17/99:35 a.m.YYZ - STL

2 stops30h 29mMultiple Airlines

Deal found 11/9C$ 327

Mon 22/92:45 p.m.YYZ - STL

1 stop4h 38mUnited Airlines

Deal found 10/9C$ 456

Wed 17/97:55 a.m.YYZ - STL

1 stop5h 24mDelta

Deal found 10/9C$ 518

Wed 17/96:35 p.m.YYZ - STL

Nonstop2h 03mAir Canada

Deal found 10/9C$ 680

Fly from

Fly to

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 7/11

9:45 a.m.-8:12 p.m.

1 stop11h 27m

Lambert-St Louis

Mon 10/11

2:42 p.m.-1:40 p.m.

2 stops21h 58m

C$ 382

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 20/10

10:40 a.m.-9:07 a.m.

2 stops23h 27m

Lambert-St Louis

Thu 23/10

10:57 a.m.-8:55 p.m.

1 stop8h 58m

C$ 489

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 7/10

7:00 a.m.-8:46 p.m.

3 stops14h 46m

Lambert-St Louis

Tue 14/10

6:00 a.m.-1:47 p.m.

1 stop6h 47m

C$ 528

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$ 532

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 11/10

11:50 a.m.-11:58 p.m.

1 stop13h 08m

Lambert-St Louis

Sat 18/10

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

1 stop9h 34m

C$ 542

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 8/11

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Lambert-St Louis

Sun 9/11

5:12 p.m.-11:59 p.m.

1 stop5h 47m

C$ 557

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 3/10

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

Nonstop2h 03m

Lambert-St Louis

Sun 5/10

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

Nonstop1h 56m

C$ 561

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 15/10

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

Nonstop2h 03m

Lambert-St Louis

Mon 20/10

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

Nonstop1h 56m

C$ 561

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$ 561

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 14/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Lambert-St Louis

Thu 16/10

6:00 a.m.-12:10 p.m.

1 stop5h 10m

C$ 568

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 18 results

Best time to book a flight from Toronto to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Toronto with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Toronto to St. Louis

How far ahead should I book a flight from Toronto to St. Louis?

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Toronto to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Toronto to St. Louis?

Currently, January is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 365). Flying from Toronto to St. Louis in September is currently the most expensive (average of C$ 491). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YTO to STL?

Unlike at noon, when flights are generally more expensive, you can save up to 22% on flights from Toronto to St. Louis by exploring options for tickets in the morning.

Weekly flight availability from Toronto to St. Louis

The most flights from YTO to STL are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

How much does it cost to fly round-trip from Toronto to St. Louis?

Reviews of airlines servicing St. Louis

Check out reviews from past customers who have flown with United Airlines,WestJet, andAir Canada from Toronto to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

United Airlines

7.4

Good

8,937 reviews

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

WestJet

7.2

Good

3,091 reviews

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Air Canada

7.1

Good

10,000 reviews

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

What airport do you fly into for flights to St. Louis from Toronto?
If you book a flight to St. Louis from Toronto, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 20.4 km from the centre of St. Louis. There are 4 flights from Toronto to Lambert-St Louis per day from 5 different airlines.
How long is the flight from Toronto to St. Louis?
For as low as C$ 532, United Airlines can have you in St. Louis from Toronto in 11h 22m. The distance from Toronto to St. Louis is about 1051 km. This flight may include one or multiple stops.
What are the cheapest airlines flying from Toronto to St. Louis round-trip?
Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at C$ 431. Additional round-trip tickets that might be worth considering are offered by Air Canada and Delta, with the lowest prices starting at C$ 473 and C$ 476, respectively. American Airlines is currently priced 35% below the average price you’ll pay for this route.
What are the most reliable airlines from Toronto to St. Louis?
The top 3 most reliable airlines when flying from Toronto to St. Louis are Air Canada (75%), Jazz (75%) and United Airlines (75%).
What are the cheapest flights from Toronto to St. Louis?
While on average a flight from Toronto to St. Louis is generally C$ 1,165, our data shows the cheapest flight currently is C$ 436. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 388 for that flight.
Can I find deals for flights from Toronto to St. Louis that include hotel bookings?
Yes. In addition to deals on Toronto to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Toronto to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Toronto to St. Louis.
Can I find deals for business class flights from Toronto to St. Louis?
Yes. Cheapflights offers flight deals from Toronto to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Toronto to St. Louis?
Currently, January is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 365). Flying from Toronto to St. Louis in September is currently the most expensive (average of C$ 491). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Chesterfield

St. Peters

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Toronto to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	CheapestC$ 431	AverageC$ 688	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	CheapestC$ 473	AverageC$ 674	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Delta	CheapestC$ 476	AverageC$ 656	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
United Airlines	CheapestC$ 476	AverageC$ 685	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
WestJet	CheapestC$ 559	AverageC$ 872	FlexibilityNo cancel fee	On-time60%	Search WestJet flights

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Cheapflights makes it easy to find Toronto to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Toronto to St. Louis?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Toronto to St. Louis for you. Better yet — we are completely free to use.

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Yes, we can. To see specific flights from Toronto to St. Louis with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Cheap flights from Toronto to St. Louis from C$ 252

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Toronto to Lambert-St Louis are usually found in June or November, booked 65 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

Cheap flight deals from Toronto to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Toronto to St. Louis

Cheapest flights from Toronto to St. LouisExplore the most affordable flight options available from Toronto to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Explore the most affordable flight options available from Toronto to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Toronto to St. Louis that are best for you.

Best time to book a flight from Toronto to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Toronto with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Toronto to St. Louis

How far ahead should I book a flight from Toronto to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Toronto to St. Louis. Price data was last updated on 29 August 2025.

What is the cheapest month to book a flight from Toronto to St. Louis?

What is the cheapest time of day to fly from YTO to STL?

Find hourly flight availability from Toronto to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 September 2025.

Weekly flight availability from Toronto to St. Louis

Explore weekly flight availability from Toronto to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 11 September 2025.

How much does it cost to fly round-trip from Toronto to St. Louis?

Reviews of airlines servicing St. Louis

Check out reviews from past customers who have flown with United Airlines,WestJet, andAir Canada from Toronto to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Toronto to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to St. Louis from Toronto?

How long is the flight from Toronto to St. Louis?

What are the cheapest airlines flying from Toronto to St. Louis round-trip?

What are the most reliable airlines from Toronto to St. Louis?

What are the cheapest flights from Toronto to St. Louis?

Can I find deals for flights from Toronto to St. Louis that include hotel bookings?

How can I find direct flights from Toronto to St. Louis?

Can I find deals for business class flights from Toronto to St. Louis?

What is the cheapest month to book a flight from Toronto to St. Louis?

Travelling to a place near St. Louis?

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Alternative routes for Toronto to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Toronto to St. Louis

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Cheapest flights from Toronto to St. Louis
Explore the most affordable flight options available from Toronto to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.