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Cheap flights from Calgary to St. Louis from C$ 241

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 28/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
15 May — 22 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 15 April 2026.

Wed 20/51:40 p.m.
YYC
-
STL
1 stop9h 16m
American Airlines
Mon 25/59:08 a.m.
STL
-
YYC
1 stop15h 35m
American Airlines
Deal found 13/4C$ 508
Wed 20/51:40 p.m.
YYC
-
STL
1 stop9h 16m
American Airlines
Sun 24/57:00 a.m.
STL
-
YYC
1 stop17h 43m
American Airlines
Deal found 13/4C$ 551
Wed 2/98:30 a.m.
YYC
-
STL
1 stop6h 08m
United Airlines
Sun 6/97:30 a.m.
STL
-
YYC
1 stop16h 06m
United Airlines
Deal found 11/4C$ 556
Thu 3/99:30 a.m.
YYC
-
STL
1 stop13h 20m
United Airlines
Sun 6/95:32 p.m.
STL
-
YYC
1 stop6h 04m
United Airlines
Deal found 14/4C$ 560
Mon 11/58:45 a.m.
YYC
-
STL
1 stop9h 38m
Multiple Airlines
Fri 15/59:18 p.m.
STL
-
YYC
2 stops37h 22m
Multiple Airlines
Deal found 14/4C$ 581
Mon 10/82:00 p.m.
YYC
-
STL
1 stop9h 36m
Delta
Sun 16/82:15 p.m.
STL
-
YYC
1 stop9h 51m
Delta
Deal found 12/4C$ 599
Wed 20/58:00 p.m.
YYC
-
STL
2 stops19h 15m
Multiple Airlines
Mon 25/55:27 p.m.
STL
-
YYC
1 stop18h 33m
Multiple Airlines
Deal found 13/4C$ 606
Tue 12/58:00 a.m.
YYC
-
STL
2 stops11h 25m
Air Canada
Fri 15/57:05 a.m.
STL
-
YYC
1 stop12h 48m
Air Canada
Deal found 14/4C$ 609

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 15 April 2026.

Round-trip from

C$ 419

One-way from

C$ 241

Popular in

November

Cheapest in

October

Average price

C$ 651
30/5-6/6
  • 30/5-6/6
  • 3 total stops
  • 32h 26m total
  • Calgary to St. Louis
Search Deals
28/5
  • 28/5
  • 1 total stop
  • 9h 33m 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 15 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 20/5

1:40 p.m.-11:56 p.m.

1 stop9h 16m

Lambert-St Louis

Sun 24/5

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

1 stop17h 43m

C$ 551
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 3/9

8:30 a.m.-3:38 p.m.

1 stop6h 08m

Lambert-St Louis

Sun 6/9

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

1 stop6h 04m

C$ 556

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 2/9

8:30 a.m.-3:38 p.m.

1 stop6h 08m

Lambert-St Louis

Sun 6/9

7:30 a.m.-10:36 p.m.

1 stop16h 06m

C$ 556

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 10/8

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

1 stop9h 36m

Lambert-St Louis

Sun 16/8

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

1 stop9h 51m

C$ 599

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 12/5

8:00 a.m.-8:25 p.m.

2 stops11h 25m

Lambert-St Louis

Fri 15/5

7:05 a.m.-6:53 p.m.

1 stop12h 48m

C$ 609

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 12/5

11:00 a.m.-11:59 p.m.

2 stops11h 59m

Lambert-St Louis

Fri 15/5

10:19 a.m.-8:05 p.m.

1 stop10h 46m

C$ 640
Cheapest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 27/5

12:00 p.m.-7:23 p.m.

2 stops30h 23m

C$ 255

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 27/5

6:15 a.m.-4:30 p.m.

1 stop9h 15m

C$ 263

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 15/7

6:45 a.m.-10:12 p.m.

2 stops14h 27m

C$ 318

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 15/5

12:27 p.m.-12:30 a.m.

1 stop11h 03m

C$ 318

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 14 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$ 396). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 732). 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 15 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
9,589 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

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
9,589 reviews
United Airlines
7.4
Good
9,589 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

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
3,321 reviews
United Airlines
7.4
Good
9,589 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

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
10,927 reviews
United Airlines
7.4
Good
9,589 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

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?

    American Airlines and United Airlines can get you from Calgary to St. Louis in just under 6h 08m. Your travel time can differ by up to 3h 08m. 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$ 260. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 542 and C$ 568, 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, May is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 396). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 732). 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
Edmonton to St. Louis flights
Calgary to Kansas City 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 15 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 260AverageC$ 651FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 542AverageC$ 615FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 568AverageC$ 695FlexibilityNo 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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