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Cheap flights from Calgary to St. Louis from C$ 215

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
1 Apr — 8 Apr1
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 2 March 2026.

Sat 25/47:40 a.m.
YYC
-
STL
2 stops8h 10m
Delta
Fri 1/52:20 p.m.
STL
-
YYC
1 stop9h 40m
Delta
Deal found 27/2C$ 516
Sun 12/45:45 a.m.
YYC
-
STL
1 stop8h 40m
Air Canada
Sun 19/44:05 p.m.
STL
-
YYC
1 stop17h 23m
Air Canada
Deal found 26/2C$ 551
Wed 8/41:25 p.m.
YYC
-
STL
1 stop9h 34m
Multiple Airlines
Sun 12/411:33 a.m.
STL
-
YYC
2 stops35h 44m
Multiple Airlines
Deal found 27/2C$ 559
Sun 12/47:40 a.m.
YYC
-
STL
2 stops14h 51m
Delta
Sun 19/42:20 p.m.
STL
-
YYC
1 stop9h 40m
Delta
Deal found 26/2C$ 573
Sun 29/312:30 p.m.
YYC
-
STL
1 stop10h 51m
Delta
Sun 5/46:32 a.m.
STL
-
YYC
2 stops15h 13m
Delta
Deal found 1/3C$ 580
Tue 24/37:40 a.m.
YYC
-
STL
2 stops14h 45m
Delta
Tue 31/36:29 a.m.
STL
-
YYC
2 stops13h 43m
Delta
Deal found 26/2C$ 607
Wed 8/47:00 a.m.
YYC
-
STL
2 stops9h 05m
Delta
Sun 12/47:03 a.m.
STL
-
YYC
2 stops14h 08m
Delta
Deal found 27/2C$ 627
Mon 23/37:40 a.m.
YYC
-
STL
2 stops14h 45m
Delta
Mon 30/36:29 a.m.
STL
-
YYC
2 stops13h 43m
Delta
Deal found 27/2C$ 652
Tue 24/37:35 p.m.
YYC
-
STL
1 stop14h 44m
Multiple Airlines
Tue 31/311:27 a.m.
STL
-
YYC
1 stop25h 16m
Multiple Airlines
Deal found 26/2C$ 671

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 2 March 2026.

Round-trip from

C$ 516

One-way from

C$ 215

Popular in

November

Cheapest in

July

Average price

C$ 640
Delta
  • Delta
  • 25/4-1/5
  • 3 total stops
  • 17h 50m total
  • Calgary to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 29/4
  • 1 total stop
  • 9h 06m total
  • Calgary to St. Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 2 March 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

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 25/4

7:40 a.m.-4:50 p.m.

2 stops8h 10m

Lambert-St Louis

Fri 1/5

2:20 p.m.-11:00 p.m.

1 stop9h 40m

C$ 516

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 12/4

5:45 a.m.-3:25 p.m.

1 stop8h 40m

Lambert-St Louis

Sun 19/4

4:05 p.m.-8:28 a.m.

1 stop17h 23m

C$ 551

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 8/4

1:25 p.m.-11:59 p.m.

1 stop9h 34m

Lambert-St Louis

Sun 12/4

11:33 a.m.-10:17 p.m.

2 stops35h 44m

C$ 559

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 12/4

7:40 a.m.-11:31 p.m.

2 stops14h 51m

Lambert-St Louis

Sun 19/4

2:20 p.m.-11:00 p.m.

1 stop9h 40m

C$ 573

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 29/3

12:30 p.m.-12:21 a.m.

1 stop10h 51m

Lambert-St Louis

Sun 5/4

6:32 a.m.-8:45 p.m.

2 stops15h 13m

C$ 580

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 24/3

7:40 a.m.-11:25 p.m.

2 stops14h 45m

Lambert-St Louis

Tue 31/3

6:29 a.m.-7:12 p.m.

2 stops13h 43m

C$ 607

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 8/4

7:00 a.m.-5:05 p.m.

2 stops9h 05m

Lambert-St Louis

Sun 12/4

7:03 a.m.-8:11 p.m.

2 stops14h 08m

C$ 627

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 23/3

7:40 a.m.-11:25 p.m.

2 stops14h 45m

Lambert-St Louis

Mon 30/3

6:29 a.m.-7:12 p.m.

2 stops13h 43m

C$ 652

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 24/3

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

1 stop14h 44m

Lambert-St Louis

Tue 31/3

11:27 a.m.-11:43 a.m.

1 stop25h 16m

C$ 671

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 17/6

1:00 a.m.-3:43 p.m.

2 stops13h 43m

Lambert-St Louis

Mon 22/6

2:53 p.m.-11:15 p.m.

1 stop9h 22m

C$ 712

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/2

Showing 1-10 of 20 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, May is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 408). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 726). 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 2 March 2026.
Read reviews from past customers who have flown WestJet and Air Canada 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.
WestJet
7.2
Good
3,279 reviews
Check prices

Boarding

7.4

Comfort

7.0

Crew

7.9

Entertainment

6.1

Food

6.2

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Blaine,Dec 2025

YYC - YVR

The worst I’ve ever had in 50 years of flying
WestJet
7.2
Good
3,279 reviews
WestJet
7.2
Good
3,279 reviews
Check prices

Boarding

7.4

Comfort

7.0

Crew

7.9

Entertainment

6.1

Food

6.2

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Blaine,Dec 2025

YYC - YVR

The worst I’ve ever had in 50 years of flying
Air Canada
7.1
Good
10,764 reviews
WestJet
7.2
Good
3,279 reviews
Check prices

Boarding

7.4

Comfort

7.0

Crew

7.9

Entertainment

6.1

Food

6.2

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Blaine,Dec 2025

YYC - YVR

The worst I’ve ever had in 50 years of flying

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?

    Delta and Air Canada can get you from Calgary to St. Louis in just under 8h 10m. Your travel time can differ by up to 30m. 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$ 356. Another option worth looking into is WestJet, starting at C$ 562 round trip. Air Canada is priced at 45% 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, May is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 408). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 726). 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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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
Edmonton to Columbia flights
Calgary to Columbia flights

Top 2 airlines flying from Calgary to St. Louis

Discover the top 2 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 2 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 356AverageC$ 628FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 562AverageC$ 658FlexibilityNo 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.

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