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Cheap flights from Calgary to St. Louis from C$ 226

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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
26 Mar — 2 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 24 February 2026.

Wed 8/41:40 p.m.
YYC
-
STL
1 stop9h 06m
American Airlines
Wed 15/48:03 p.m.
STL
-
YYC
1 stop17h 56m
American Airlines
Deal found 22/2C$ 374
Fri 1/57:00 a.m.
YYC
-
STL
1 stop22h 50m
Multiple Airlines
Sat 9/58:12 p.m.
STL
-
YYC
1 stop19h 33m
Multiple Airlines
Deal found 24/2C$ 400
Wed 1/41:30 p.m.
YYC
-
STL
1 stop9h 14m
American Airlines
Sun 5/46:00 a.m.
STL
-
YYC
1 stop7h 50m
American Airlines
Deal found 22/2C$ 481
Thu 12/312:30 p.m.
YYC
-
STL
1 stop10h 51m
Delta
Mon 16/32:22 p.m.
STL
-
YYC
1 stop9h 40m
Delta
Deal found 24/2C$ 518
Thu 12/35:35 a.m.
YYC
-
STL
1 stop8h 54m
Multiple Airlines
Mon 16/39:50 a.m.
STL
-
YYC
2 stops11h 34m
Multiple Airlines
Deal found 24/2C$ 532
Wed 11/36:30 a.m.
YYC
-
STL
1 stop6h 54m
Delta
Fri 20/32:12 p.m.
STL
-
YYC
1 stop9h 50m
Delta
Deal found 22/2C$ 555
Wed 11/35:35 a.m.
YYC
-
STL
1 stop8h 54m
Air Canada
Wed 18/34:05 p.m.
STL
-
YYC
1 stop8h 54m
Air Canada
Deal found 22/2C$ 562
Fri 13/311:40 p.m.
YYC
-
STL
1 stop14h 49m
Air Canada
Wed 18/34:05 p.m.
STL
-
YYC
1 stop8h 54m
Air Canada
Deal found 22/2C$ 596

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 24 February 2026.

Round-trip from

C$ 374

One-way from

C$ 226

Popular in

November

Cheapest in

July

Average price

C$ 672
American Airlines
  • American Airlines
  • 8/4-15/4
  • 2 total stops
  • 27h 02m total
  • Calgary to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 25/3
  • 1 total stop
  • 9h 14m total
  • Calgary to St. Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 30 potential increase over avg. RT price).
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 February 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 24 February 2026.
Use the filters below to find and compare flights from Calgary to St. Louis that are best for you.

Fly from

Calgary

Fly to

St. Louis

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 8/4

6:45 a.m.-10:17 p.m.

2 stops14h 32m

Lambert-St Louis

Wed 15/4

5:21 p.m.-12:59 p.m.

1 stop20h 38m

C$ 388

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 1/4

1:30 p.m.-11:44 p.m.

1 stop9h 14m

Lambert-St Louis

Sun 5/4

6:00 a.m.-12:50 p.m.

1 stop7h 50m

C$ 481

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/3

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

1 stop10h 51m

Lambert-St Louis

Mon 16/3

2:22 p.m.-11:02 p.m.

1 stop9h 40m

C$ 518

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/3

5:35 a.m.-3:29 p.m.

1 stop8h 54m

Lambert-St Louis

Mon 16/3

9:50 a.m.-8:24 p.m.

2 stops11h 34m

C$ 532

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/3

7:40 a.m.-5:07 p.m.

1 stop8h 27m

Lambert-St Louis

Fri 20/3

2:12 p.m.-11:02 p.m.

1 stop9h 50m

C$ 555

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 13/3

6:30 a.m.-5:05 p.m.

1 stop9h 35m

Lambert-St Louis

Fri 20/3

2:12 p.m.-11:02 p.m.

1 stop9h 50m

C$ 555

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 11/3

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

2 stops9h 00m

Lambert-St Louis

Wed 18/3

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

2 stops14h 08m

C$ 629

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/3

7:40 a.m.-5:07 p.m.

1 stop8h 27m

Lambert-St Louis

Thu 19/3

7:15 a.m.-6:17 p.m.

2 stops12h 02m

C$ 629

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 13/3

6:30 a.m.-5:05 p.m.

1 stop9h 35m

Lambert-St Louis

Wed 18/3

6:29 a.m.-1:55 p.m.

2 stops8h 26m

C$ 629

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 2/8

6:00 a.m.-6:02 p.m.

2 stops11h 02m

Lambert-St Louis

Sat 8/8

12:10 p.m.-7:40 p.m.

2 stops8h 30m

C$ 737

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/2

Showing 1-10 of 20 results
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$ 410). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 729). 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.

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 24 February 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
9,345 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Entertainment

7.1

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
9,345 reviews
United Airlines
7.4
Good
9,345 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Entertainment

7.1

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
3,274 reviews
United Airlines
7.4
Good
9,345 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Entertainment

7.1

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
10,745 reviews
United Airlines
7.4
Good
9,345 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Entertainment

7.1

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?

    American Airlines and Delta can get you from Calgary to St. Louis in just under 10h 51m. Your travel time can differ by up to 3h 41m. 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$ 358. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 441 and C$ 565, respectively. 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$ 410). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 729). 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
Edmonton to Columbia flights
Calgary 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 24 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 358AverageC$ 631FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 441AverageC$ 612FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 565AverageC$ 661FlexibilityNo 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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