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Cheap flights from Canada to St. Louis from C$ 186

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 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
18 Feb — 25 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Canada to St. Louis

Keep the following information in mind while searching for Canada to St. Louis flight deals. Data was last updated 19 January 2026.

Round-trip from

C$ 364

One-way from

C$ 186

Popular in

September

Cheapest in

June

Average price

C$ 550

Good round-trip deal

C$ 575 or less

Good one-way deal

C$ 499 or less
United Airlines
  • United Airlines
  • 4/3-11/3
  • 2 total stops
  • 16h 07m total
  • Canada to St. Louis
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4/3
  • 4/3
  • 1 total stop
  • 16h 17m total
  • Canada to St. Louis
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from Canada to Lambert-St Louis.
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Price to beat on a one-way flight from Canada to Lambert-St Louis.
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Find flight deals from Canada to St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from Canada to St. Louis
Explore the most affordable flight options available from Canada to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 January 2026.

Wed 4/37:15 p.m.
YVR
-
STL
2 stops16h 04m
United Airlines
Wed 11/35:55 p.m.
STL
-
YVR
2 stops19h 05m
United Airlines
Deal found 18/1C$ 364
Tue 3/38:20 p.m.
YYZ
-
STL
1 stop27h 07m
Multiple Airlines
Tue 10/34:51 p.m.
STL
-
YYZ
1 stop17h 35m
Multiple Airlines
Deal found 17/1C$ 416
Thu 5/28:20 p.m.
YYZ
-
STL
2 stops35h 31m
Multiple Airlines
Mon 16/23:49 p.m.
STL
-
YYZ
1 stop21h 27m
Multiple Airlines
Deal found 18/1C$ 419
Sat 7/22:15 p.m.
YOW
-
STL
2 stops7h 58m
United Airlines
Sat 14/27:41 a.m.
STL
-
YOW
1 stop8h 26m
United Airlines
Deal found 16/1C$ 428
Thu 26/26:20 a.m.
YVR
-
STL
2 stops9h 22m
Delta
Mon 2/36:40 p.m.
STL
-
YVR
2 stops18h 09m
Delta
Deal found 17/1C$ 442
Tue 3/21:44 p.m.
YVR
-
STL
1 stop7h 15m
American Airlines
Tue 10/212:03 p.m.
STL
-
YVR
1 stop11h 12m
American Airlines
Deal found 17/1C$ 447
Thu 12/210:30 a.m.
YVR
-
STL
1 stop8h 35m
United Airlines
Tue 17/24:30 p.m.
STL
-
YVR
1 stop8h 36m
United Airlines
Deal found 18/1C$ 448
Tue 17/25:25 p.m.
YUL
-
STL
2 stops30h 02m
Multiple Airlines
Mon 23/23:49 p.m.
STL
-
YUL
1 stop7h 41m
Multiple Airlines
Deal found 18/1C$ 467
Tue 3/312:30 a.m.
YYC
-
STL
2 stops20h 57m
Multiple Airlines
Wed 11/311:32 a.m.
STL
-
YYC
1 stop8h 37m
Multiple Airlines
Deal found 18/1C$ 474
Wed 18/26:00 a.m.
YHZ
-
STL
2 stops29h 32m
WestJet
Tue 24/21:13 p.m.
STL
-
YHZ
2 stops10h 28m
WestJet
Deal found 16/1C$ 474
Tue 10/38:00 a.m.
YVR
-
STL
2 stops23h 49m
Multiple Airlines
Fri 13/312:14 p.m.
STL
-
YVR
1 stop12h 06m
Multiple Airlines
Deal found 18/1C$ 481
Mon 2/312:30 a.m.
YYC
-
STL
1 stop29h 21m
Multiple Airlines
Tue 10/37:00 a.m.
STL
-
YYC
1 stop11h 50m
Multiple Airlines
Deal found 16/1C$ 486

Cheapflights Fare Finder

 
Customize your flight search to find flights from Canada 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, Cheapflights users made 629,999 searches. Data last updated 19 January 2026.
Use the filters below to find and compare flights from Canada to St. Louis that are best for you.

Fly from

Canada

Fly to

St. Louis

Route

Depart

Return

Price

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Wed 4/3

7:15 p.m.-1:19 p.m.

2 stops16h 04m

Lambert-St Louis

Wed 11/3

5:55 p.m.-11:00 a.m.

2 stops19h 05m

C$ 364

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 3/3

8:20 p.m.-10:27 p.m.

1 stop27h 07m

Lambert-St Louis

Tue 10/3

4:51 p.m.-11:26 a.m.

1 stop17h 35m

C$ 416

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Mon 9/2

5:55 p.m.-11:59 p.m.

1 stop7h 04m

Lambert-St Louis

Sat 14/2

9:55 a.m.-9:56 p.m.

2 stops11h 01m

C$ 428

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 7/2

5:11 p.m.-9:13 p.m.

1 stop5h 02m

Lambert-St Louis

Mon 9/2

7:00 a.m.-1:32 p.m.

1 stop5h 32m

C$ 428

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 10/2

6:00 a.m.-2:30 p.m.

2 stops9h 30m

Lambert-St Louis

Wed 11/2

8:30 a.m.-2:27 p.m.

1 stop4h 57m

C$ 428

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 7/2

2:15 p.m.-9:13 p.m.

2 stops7h 58m

Lambert-St Louis

Tue 10/2

11:20 a.m.-9:56 p.m.

2 stops9h 36m

C$ 428

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 10/2

6:00 a.m.-2:30 p.m.

2 stops9h 30m

Lambert-St Louis

Sat 14/2

9:55 a.m.-9:56 p.m.

2 stops11h 01m

C$ 428

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Mon 9/2

5:55 p.m.-11:59 p.m.

1 stop7h 04m

Lambert-St Louis

Tue 10/2

9:57 a.m.-9:18 p.m.

1 stop10h 21m

C$ 428

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 10/2

5:11 p.m.-10:58 p.m.

1 stop6h 47m

Lambert-St Louis

Fri 13/2

6:45 p.m.-10:26 a.m.

1 stop14h 41m

C$ 428

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 13/2

5:48 p.m.-11:59 p.m.

1 stop7h 11m

Lambert-St Louis

Sat 14/2

11:25 a.m.-9:56 p.m.

2 stops9h 31m

C$ 428

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/1

Showing 1-10 of 60 results
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Best time to book a flight from Canada to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Canada 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 Canada to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from Canada to St. Louis (average of C$ 273). Flying from Canada to St. Louis in September is currently the most expensive (average of C$ 479). 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 CA to STL?

Find hourly flight availability from Canada 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 19 January 2026.

When flying from Canada to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 43% versus a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Canada to St. Louis. Price data was last updated on 17 January 2026.

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

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated 19 January 2026.
Read through reviews of airlines operating flights from Canada to St. Louis, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,075 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,075 reviews
Delta
7.9
Good
8,075 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,177 reviews
Delta
7.9
Good
8,075 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,160 reviews
Delta
7.9
Good
8,075 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
WestJet
7.2
Good
3,245 reviews
Delta
7.9
Good
8,075 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,635 reviews
Delta
7.9
Good
8,075 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Canada 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 Canada?

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Canada to St. Louis. It is only a 20.4 km journey from Lambert-St Louis (STL) to St. Louis’s city centre.

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

    For as low as C$ 442, United Airlines can have you in St. Louis from Canada in 9h 22m. Canada and St. Louis are separated by a distance of 2840 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Canada to St. Louis one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at C$ 244. Air Canada flights start at C$ 267 while deals on WestJet start at C$ 376 one-way.

  • What are the most popular routes from Canada to St. Louis?

    While some choose either Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis or Vancouver Intl - Lambert-St Louis, Toronto Pearson Intl - Lambert-St Louis is the most popular route from Canada to St. Louis.

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

    Before booking your flight to St. Louis from Canada, check out the most reliable airlines to get you to your destination on time: Air Canada (83%), Jazz (83%), United Airlines( 83%).

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

    On average you can expect to pay C$ 587 for a flight from Canada to St. Louis. The cheapest flight overall is C$ 575 while the most popular route, (Toronto Pearson Intl - Lambert-St Louis) is currently priced at C$ 352.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Canada 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 Canada to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Canada to St. Louis (average of C$ 273). Flying from Canada to St. Louis in September is currently the most expensive (average of C$ 479). 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
St. Peters

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Alternative routes for Canada to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to St. Louis flights
Vancouver Intl to St. Louis flights
Pierre Elliott Trudeau Intl to St. Louis flights
Vancouver Intl to Kansas City flights
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Pearson Intl to Kansas City flights
Edmonton to Kansas City flights
Vancouver Intl to Springfield flights
Ottawa to St. Louis flights
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Calgary to Kansas City flights
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Halifax to St. Louis flights
Winnipeg to Kansas City flights
Québec City to St. Louis flights
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Ottawa to Kansas City flights
Pearson Intl to Springfield flights
Saskatoon to St. Louis flights
Saskatoon to Kansas City flights
Victoria to Kansas City flights
Pearson Intl to Columbia flights
Halifax to Kansas City flights
Comox to Kansas City flights
Edmonton to St. Louis flights
Victoria to St. Louis flights
Charlottetown to St. Louis flights
Calgary to Columbia flights
Edmonton to Columbia flights
Pearson Intl to Quincy flights
Regina to Branson flights
Buffalo to Kansas City flights

Top 5 airlines flying from Canada to St. Louis

Discover the top 5 airlines that operate flights from Canada to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 19 January 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 340AverageC$ 664FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 375AverageC$ 690FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 421AverageC$ 681FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 455AverageC$ 684FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 466AverageC$ 770FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Canada to St. Louis?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Canada to St. Louis. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

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

Can Cheapflights find flights from Canada to St. Louis with no change fees?

Yes! Cheapflights helps users easily find flights from Canada to St. Louis with no change fees.

Can Cheapflights notify me if prices for flights from Canada to St. Louis become cheaper?

Of course! You can now track prices for flights from Canada to St. Louis and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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