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Cheap flights from Calgary to St. Louis from C$ 230

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
10 May — 17 May1
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 10 April 2026.

Sat 3/102:00 p.m.
YYC
-
STL
1 stop9h 36m
Delta
Sat 10/103:45 p.m.
STL
-
YYC
1 stop6h 09m
Delta
Deal found 6/4C$ 465
Tue 28/47:00 a.m.
YYC
-
STL
1 stop22h 50m
Multiple Airlines
Fri 1/58:23 p.m.
STL
-
YYC
1 stop15h 37m
Multiple Airlines
Deal found 7/4C$ 476
Tue 12/57:00 a.m.
YYC
-
STL
1 stop24h 55m
Multiple Airlines
Thu 14/56:55 p.m.
STL
-
YYC
2 stops20h 50m
Multiple Airlines
Deal found 8/4C$ 486
Wed 2/96:00 a.m.
YYC
-
STL
1 stop13h 39m
United Airlines
Sun 6/95:32 p.m.
STL
-
YYC
1 stop6h 04m
United Airlines
Deal found 7/4C$ 495
Tue 22/96:45 a.m.
YYC
-
STL
1 stop7h 00m
American Airlines
Mon 28/97:44 a.m.
STL
-
YYC
1 stop16h 36m
American Airlines
Deal found 8/4C$ 499
Thu 21/51:40 p.m.
YYC
-
STL
1 stop17h 52m
American Airlines
Thu 28/56:00 a.m.
STL
-
YYC
1 stop18h 43m
American Airlines
Deal found 6/4C$ 505
Tue 22/97:15 a.m.
YYC
-
STL
2 stops14h 46m
Delta
Mon 28/92:15 p.m.
STL
-
YYC
1 stop9h 51m
Delta
Deal found 8/4C$ 508
Sat 19/127:15 a.m.
YYC
-
STL
1 stop9h 41m
Delta
Mon 4/12:15 p.m.
STL
-
YYC
1 stop9h 58m
Delta
Deal found 5/4C$ 515
Sat 12/92:00 p.m.
YYC
-
STL
1 stop9h 36m
Delta
Sat 19/93:50 p.m.
STL
-
YYC
1 stop5h 54m
Delta
Deal found 6/4C$ 531

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 10 April 2026.

Round-trip from

C$ 448

One-way from

C$ 230

Popular in

November

Cheapest in

October

Average price

C$ 654
American Airlines
  • American Airlines
  • 20/5-27/5
  • 2 total stops
  • 27h 59m total
  • Calgary to St. Louis
Search Deals
20/5
  • 20/5
  • 1 total stop
  • 14h 45m total
  • Calgary to St. Louis
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 16 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 10 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

Sat 3/10

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

1 stop9h 36m

Lambert-St Louis

Sat 10/10

3:45 p.m.-8:54 p.m.

1 stop6h 09m

C$ 465

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 28/4

7:00 a.m.-6:50 a.m.

1 stop22h 50m

Lambert-St Louis

Fri 1/5

8:23 p.m.-11:00 a.m.

1 stop15h 37m

C$ 476

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 12/9

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

1 stop9h 36m

Lambert-St Louis

Sat 19/9

12:10 p.m.-11:06 p.m.

2 stops11h 56m

C$ 486

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 2/9

6:00 a.m.-8:39 p.m.

1 stop13h 39m

Lambert-St Louis

Sun 6/9

5:32 p.m.-10:36 p.m.

1 stop6h 04m

C$ 495

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 22/9

6:45 a.m.-2:45 p.m.

1 stop7h 00m

Lambert-St Louis

Mon 28/9

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

1 stop16h 36m

C$ 499
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 22/8

9:30 a.m.-4:31 p.m.

1 stop6h 01m

Lambert-St Louis

Mon 24/8

5:32 p.m.-10:36 p.m.

1 stop6h 04m

C$ 542

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 12/5

7:00 a.m.-5:33 p.m.

1 stop9h 33m

Lambert-St Louis

Thu 14/5

6:55 p.m.-11:00 a.m.

1 stop17h 05m

C$ 553

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 26/5

11:00 a.m.-9:09 p.m.

1 stop9h 09m

Lambert-St Louis

Fri 29/5

1:59 p.m.-8:05 p.m.

1 stop7h 06m

C$ 564

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 24/4

6:40 a.m.-4:50 p.m.

1 stop9h 10m

Lambert-St Louis

Tue 28/4

9:59 a.m.-8:05 p.m.

2 stops11h 06m

C$ 587
Cheapest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 23/5

8:45 a.m.-7:23 p.m.

1 stop9h 38m

C$ 270

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/4

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, July is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 434). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 736). 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 10 April 2026.
Read reviews from past customers who have flown United Airlines,WestJet, andAir 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.
United Airlines
7.4
Good
9,561 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,561 reviews
United Airlines
7.4
Good
9,561 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
WestJet
7.2
Good
3,320 reviews
United Airlines
7.4
Good
9,561 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
10,915 reviews
United Airlines
7.4
Good
9,561 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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, United Airlines, and American Airlines can get you from Calgary to St. Louis in just under 7h. Your travel time can differ by up to 6h 39m. 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$ 261. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 545 and C$ 570, 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, July is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 434). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 736). 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
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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
Calgary to Columbia flights
Edmonton to Columbia flights

Top 3 airlines flying from Calgary to St. Louis

Discover the top 3 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 10 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 261AverageC$ 655FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 545AverageC$ 618FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 570AverageC$ 681FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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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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