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Cheap flights from Toronto to St. Louis from C$ 306

YTO — STL
21 Nov — 28 Nov1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Toronto to St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from Toronto to St. Louis

Thu 12/116:30 a.m. -
1 stop17h 46m
Mon 16/116:34 p.m. -
2 stops24h 06m
Deal found 20/10C$ 547
Thu 17/127:14 a.m. -
1 stop9h 37m
Mon 21/126:00 a.m. -
1 stop10h 40m
Deal found 21/10C$ 568
Mon 16/1112:44 p.m. -
1 stop9h 54m
Mon 23/116:59 a.m. -
1 stop8h 34m
Deal found 19/10C$ 573
Thu 12/1112:44 p.m. -
1 stop9h 54m
Tue 17/117:00 a.m. -
1 stop8h 34m
Deal found 20/10C$ 575
Wed 18/113:15 p.m. -
1 stop8h 00m
Wed 25/115:00 a.m. -
1 stop8h 33m
Deal found 21/10C$ 578
Sun 22/113:15 p.m. -
1 stop9h 46m
Wed 2/1211:37 a.m. -
1 stop11h 04m
Deal found 21/10C$ 583
Tue 10/1112:44 p.m. -
1 stop9h 54m
Thu 12/116:00 a.m. -
1 stop7h 34m
Deal found 21/10C$ 585
Thu 3/1211:36 a.m. -
1 stop8h 13m
Sun 6/126:02 a.m. -
1 stop7h 40m
Deal found 21/10C$ 592
Fri 4/1211:36 a.m. -
1 stop9h 22m
Fri 11/126:48 a.m. -
1 stop8h 42m
Deal found 21/10C$ 599
Wed 18/116:25 p.m. -
2 stops25h 14m
Wed 25/116:05 p.m. -
1 stop20h 13m
Deal found 21/10C$ 603
Wed 2/129:35 a.m. -
1 stop11h 36m
Wed 9/1212:02 p.m. -
2 stops24h 38m
Deal found 17/10C$ 618

Find flight deals from Toronto to St. Louis

Round-trip from

C$ 547

One-way from

C$ 306

Popular in

March

Cheapest in

January

Average price

C$ 1,001

Good round-trip deal

C$ 758 or less
12/11-16/11
  • 12/11-16/11
  • 3 total stops
  • 41h 52m total
  • Toronto to St. Louis
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6/12-31/12
  • 6/12-31/12
  • 2 total stops
  • 27h 02m total
  • Toronto to St. Louis
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Highest demand for flights based on searches. 11% potential increase in price (C$ 140 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease (C$ 66 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Price to beat on a round-trip flight from Toronto (YTO) to Lambert-St Louis.
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Cheapflights Fare Finder

 
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

Cheapest round-trip

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Thu 3/12

11:36 a.m.-7:58 p.m.

1 stop9h 22m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 354

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Mon 16/11

6:30 a.m.-11:16 p.m.

1 stop17h 46m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 357

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Tue 3/11

6:25 p.m.-5:40 p.m.

2 stops24h 15m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 387

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Thu 24/12

7:44 p.m.-10:42 a.m.

2 stops15h 58m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 422

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Fri 25/12

6:00 a.m.-6:29 p.m.

2 stops13h 29m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 469

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Sun 25/10

1:00 p.m.-1:31 p.m.

2 stops25h 31m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 496

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Mon 2/11

6:30 a.m.-5:40 p.m.

2 stops12h 10m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 498

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Thu 19/11

7:35 a.m.-11:03 a.m.

3 stops28h 28m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 498

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Sun 8/11

7:35 a.m.-11:19 a.m.

3 stops28h 44m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 507

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Sat 31/10

6:30 a.m.-1:33 p.m.

3 stops32h 03m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 535

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/10

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

Cheapflights Insights

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

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$ 590). Flying from Toronto to St. Louis in April is currently the most expensive (average of C$ 857). 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 in the evening, when flights are generally more expensive, you can save up to 36% on flights from Toronto to St. Louis by exploring options for tickets in the afternoon.

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$ 634 and C$ 975 in November.
The cheapest round-trip price found within the last 5 days was C$ 547 on Multiple Airlines (12 Nov-16 Nov).

What’s the top layover airport for flights from Toronto to St. Louis?

Chicago (ORD) – chosen by Cheapflights users on 80% of one-stop itineraries from Toronto to St. Louis on Cheapflights.

What’s the cheapest layover airport for flights from Toronto to St. Louis?

Chicago (ORD) is the most affordable 1-stop option, with an average round-trip price of C$ 561.

What’s the fastest layover option from Toronto to St. Louis?

Flights via Detroit (DTW) have the shortest average one-way travel time for 1-stop routes: 4h 19m.

Which airport typically offers the quickest layover for flights from Toronto to St. Louis?

Flights via Detroit (DTW) offer the fastest connection on this route, with an average layover time of 1h 26m.

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

Booking 63 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.

Reviews of airlines servicing St. Louis

Check out reviews from past customers who have flown with Air 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.
Air Canada
7.1
Good
11,793 reviews
Check prices

Boarding

7.3

Entertainment

6.8

Overall

7.1

Comfort

7.1

Food

6.3

Crew

7.8

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had
Air Canada
7.1
Good
11,793 reviews
Air Canada
7.1
Good
11,793 reviews
Check prices

Boarding

7.3

Entertainment

6.8

Overall

7.1

Comfort

7.1

Food

6.3

Crew

7.8

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had

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 2 flights from Toronto to Lambert-St Louis per day from 2 different airlines.

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

    For as low as C$ 616, Delta can have you in St. Louis from Toronto in 13h 52m. The distance from Toronto to St. Louis is about 1051 km.

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

    Flying on United Airlines is currently your cheapest option to St. Louis, with prices starting at C$ 350. Another option worth looking into is Air Canada, starting at C$ 448 round trip. United Airlines is currently priced 56% 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 (73%), Jazz (73%) and United Airlines (73%).

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

    While on average a flight from Toronto to St. Louis is generally C$ 814, our data shows the cheapest flight currently is C$ 580. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 547 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$ 590). Flying from Toronto to St. Louis in April is currently the most expensive (average of C$ 857). 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

Travelling to a place near St. Louis?

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

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Top 2 airlines flying from Toronto to St. Louis

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 350AverageC$ 757FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 448AverageC$ 679FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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