Find flights
When to book
Airlines
FAQs

Cheap flights from Calgary 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
30 May — 6 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Calgary to St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from Calgary to St. Louis
Explore the most affordable flight options available from Calgary to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2026.

Wed 10/67:00 a.m.
YYC
-
STL
1 stop16h 16m
American Airlines
Wed 17/69:08 a.m.
STL
-
YYC
1 stop15h 34m
American Airlines
Deal found 26/4C$ 477
Tue 22/96:30 a.m.
YYC
-
STL
1 stop12h 33m
American Airlines
Thu 24/97:44 a.m.
STL
-
YYC
1 stop16h 36m
American Airlines
Deal found 25/4C$ 501
Fri 23/102:00 p.m.
YYC
-
STL
1 stop9h 36m
Delta
Sun 25/102:15 p.m.
STL
-
YYC
1 stop9h 58m
Delta
Deal found 28/4C$ 502
Thu 21/51:27 p.m.
YYC
-
STL
1 stop6h 43m
United Airlines
Fri 22/59:06 a.m.
STL
-
YYC
1 stop5h 47m
United Airlines
Deal found 25/4C$ 512
Mon 11/57:45 a.m.
YYC
-
STL
2 stops15h 14m
Delta
Wed 13/52:27 p.m.
STL
-
YYC
1 stop9h 30m
Delta
Deal found 27/4C$ 520
Mon 1/69:00 p.m.
YYC
-
STL
2 stops19h 33m
Multiple Airlines
Fri 5/68:08 p.m.
STL
-
YYC
1 stop19h 37m
Multiple Airlines
Deal found 28/4C$ 555
Sat 23/58:45 a.m.
YYC
-
STL
2 stops31h 48m
Multiple Airlines
Sat 30/55:27 p.m.
STL
-
YYC
1 stop18h 33m
Multiple Airlines
Deal found 25/4C$ 562
Fri 23/107:00 a.m.
YYC
-
STL
1 stop7h 58m
WestJet
Sun 25/106:30 a.m.
STL
-
YYC
2 stops12h 50m
WestJet
Deal found 28/4C$ 565
Fri 19/610:15 a.m.
YYC
-
STL
1 stop5h 31m
WestJet
Fri 26/610:20 a.m.
STL
-
YYC
1 stop10h 45m
WestJet
Deal found 28/4C$ 572
Mon 11/512:30 a.m.
YYC
-
STL
1 stop8h 14m
WestJet
Fri 15/511:25 a.m.
STL
-
YYC
1 stop6h 35m
WestJet
Deal found 28/4C$ 574

Find flight deals from Calgary to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Calgary (YYC) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 30 April 2026.

Round-trip from

C$ 477

One-way from

C$ 252

Popular in

June

Cheapest in

October

Average price

C$ 649
American Airlines
  • American Airlines
  • 10/6-17/6
  • 2 total stops
  • 31h 50m total
  • Calgary to St. Louis
Search Deals
10/6
  • 10/6
  • 1 total stop
  • 9h 38m total
  • Calgary to St. Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Calgary 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 30 April 2026.
Use the filters below to find and compare flights from Calgary to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 10/6

7:00 a.m.-12:16 a.m.

1 stop16h 16m

Lambert-St Louis

Wed 17/6

9:08 a.m.-11:42 p.m.

1 stop15h 34m

C$ 477

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 22/9

6:30 a.m.-8:03 p.m.

1 stop12h 33m

Lambert-St Louis

Thu 24/9

7:44 a.m.-11:20 p.m.

1 stop16h 36m

C$ 501

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 23/10

2:00 p.m.-12:36 a.m.

1 stop9h 36m

Lambert-St Louis

Sun 25/10

2:15 p.m.-11:13 p.m.

1 stop9h 58m

C$ 502
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 21/5

1:27 p.m.-9:10 p.m.

1 stop6h 43m

Lambert-St Louis

Fri 22/5

9:06 a.m.-1:53 p.m.

1 stop5h 47m

C$ 512

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 22/5

1:40 p.m.-8:32 a.m.

1 stop17h 52m

Lambert-St Louis

Mon 25/5

7:00 a.m.-11:43 p.m.

1 stop17h 43m

C$ 518

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 11/5

7:45 a.m.-11:59 p.m.

2 stops15h 14m

Lambert-St Louis

Wed 13/5

2:27 p.m.-10:57 p.m.

1 stop9h 30m

C$ 520

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 11/5

12:30 a.m.-9:44 a.m.

1 stop8h 14m

Lambert-St Louis

Fri 15/5

11:25 a.m.-5:00 p.m.

1 stop6h 35m

C$ 574

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 19/8

6:35 a.m.-2:31 p.m.

1 stop6h 56m

Lambert-St Louis

Sun 23/8

2:15 p.m.-11:06 p.m.

1 stop9h 51m

C$ 581

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 9/7

9:00 p.m.-8:19 a.m.

2 stops10h 19m

Lambert-St Louis

Fri 17/7

6:30 a.m.-8:05 p.m.

1 stop14h 35m

C$ 587
Cheapest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 19/9

2:00 p.m.-12:36 a.m.

1 stop9h 36m

C$ 295

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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

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

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

Currently, October is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 525). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 812). 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.

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

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 30 April 2026.
Read reviews from past customers who have flown Delta,United Airlines, andWestJet from Calgary to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,463 reviews
Check prices

Entertainment

7.8

Overall

7.9

Boarding

8.1

Food

7.2

Comfort

7.9

Crew

8.5

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
8,463 reviews
Delta
7.9
Good
8,463 reviews
Check prices

Entertainment

7.8

Overall

7.9

Boarding

8.1

Food

7.2

Comfort

7.9

Crew

8.5

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
9,677 reviews
Delta
7.9
Good
8,463 reviews
Check prices

Entertainment

7.8

Overall

7.9

Boarding

8.1

Food

7.2

Comfort

7.9

Crew

8.5

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
3,330 reviews
Delta
7.9
Good
8,463 reviews
Check prices

Entertainment

7.8

Overall

7.9

Boarding

8.1

Food

7.2

Comfort

7.9

Crew

8.5

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
10,982 reviews
Delta
7.9
Good
8,463 reviews
Check prices

Entertainment

7.8

Overall

7.9

Boarding

8.1

Food

7.2

Comfort

7.9

Crew

8.5

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 Calgary to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    American Airlines, Delta, and United Airlines can get you from Calgary to St. Louis in just under 6h 43m. Your travel time can differ by up to 9h 33m. Airlines will cover a distance of 2297 km. This flight may include one or multiple stops.

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

    Flying on Air Canada is currently your cheapest option to St. Louis, with prices starting at C$ 257. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at C$ 313 and C$ 537, respectively. Air Canada is priced at 61% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 525). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 812). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Calgary to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Edmonton to Kansas City flights
Calgary to Kansas City flights
Edmonton to St. Louis flights
Calgary to Columbia flights
Edmonton to Columbia flights

Top 4 airlines flying from Calgary to St. Louis

Discover the top 4 airlines that operate flights from Calgary 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 30 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 257AverageC$ 666FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 313AverageC$ 536FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 537AverageC$ 609FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 587AverageC$ 717FlexibilityNo 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 Calgary to St. Louis?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Calgary 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 Calgary to St. Louis?

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

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

Need flexible booking options for your flight to St. Louis from Calgary? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Of course! You can now track prices for flights from Calgary 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.