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Cheap flights from Calgary to St. Louis from C$ 242

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 21/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
11 Aug — 18 Aug1
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 12 July 2026.

Thu 8/1012:33 p.m.
YYC
-
STL
1 stop11h 01m
Delta
Wed 14/102:22 p.m.
STL
-
YYC
1 stop9h 42m
Delta
Deal found 9/7C$ 457
Fri 4/911:55 p.m.
YYC
-
STL
1 stop13h 07m
Air Canada
Sat 12/92:40 p.m.
STL
-
YYC
1 stop9h 17m
Air Canada
Deal found 11/7C$ 468
Sun 23/87:00 a.m.
YYC
-
STL
2 stops15h 26m
WestJet
Sun 30/86:20 a.m.
STL
-
YYC
2 stops10h 50m
WestJet
Deal found 9/7C$ 511
Fri 4/97:00 a.m.
YYC
-
STL
1 stop9h 53m
WestJet
Sat 12/96:15 a.m.
STL
-
YYC
2 stops10h 55m
WestJet
Deal found 11/7C$ 514
Wed 21/106:00 a.m.
YYC
-
STL
1 stop13h 36m
Multiple Airlines
Sun 25/104:05 p.m.
STL
-
YYC
1 stop17h 39m
Multiple Airlines
Deal found 8/7C$ 519
Fri 9/1011:55 p.m.
YYC
-
STL
1 stop13h 05m
Air Canada
Wed 14/108:55 a.m.
STL
-
YYC
1 stop9h 12m
Air Canada
Deal found 9/7C$ 522
Mon 10/81:00 a.m.
YYC
-
STL
2 stops11h 14m
WestJet
Thu 13/83:39 p.m.
STL
-
YYC
1 stop20h 21m
WestJet
Deal found 9/7C$ 532
Sat 1/87:00 a.m.
YYC
-
STL
2 stops14h 03m
Multiple Airlines
Sun 9/86:34 p.m.
STL
-
YYC
1 stop17h 26m
Multiple Airlines
Deal found 10/7C$ 536
Sun 23/88:45 a.m.
YYC
-
STL
2 stops31h 37m
Multiple Airlines
Sun 30/86:17 p.m.
STL
-
YYC
1 stop28h 33m
Multiple Airlines
Deal found 9/7C$ 538
Mon 10/812:55 a.m.
YYC
-
STL
1 stop12h 09m
Air Canada
Thu 13/812:10 p.m.
STL
-
YYC
1 stop12h 42m
Air Canada
Deal found 9/7C$ 539
Fri 7/87:00 a.m.
YYC
-
STL
1 stop8h 17m
WestJet
Fri 7/86:25 p.m.
STL
-
YYC
1 stop26h 50m
WestJet
Deal found 11/7C$ 548

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 12 July 2026.

Round-trip from

C$ 457

One-way from

C$ 242

Popular in

June

Cheapest in

May

Average price

C$ 831
Delta
  • Delta
  • 8/10-14/10
  • 2 total stops
  • 20h 43m total
  • Calgary to St. Louis
Search Deals
21/8
  • 21/8
  • 1 total stop
  • 9h 22m total
  • Calgary to St. Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 12 July 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

Fri 4/9

7:00 a.m.-5:53 p.m.

1 stop9h 53m

Lambert-St Louis

Sat 12/9

6:15 a.m.-4:10 p.m.

2 stops10h 55m

C$ 514

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 21/10

6:00 a.m.-8:36 p.m.

1 stop13h 36m

Lambert-St Louis

Sun 25/10

4:05 p.m.-8:44 a.m.

1 stop17h 39m

C$ 519

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 22/10

12:30 p.m.-9:21 p.m.

1 stop7h 51m

Lambert-St Louis

Sun 25/10

4:05 p.m.-8:44 a.m.

1 stop17h 39m

C$ 519

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 23/8

7:00 a.m.-11:26 p.m.

2 stops15h 26m

Lambert-St Louis

Sun 30/8

3:39 p.m.-5:10 p.m.

1 stop26h 31m

C$ 521

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 7/8

7:00 a.m.-4:17 p.m.

1 stop8h 17m

Lambert-St Louis

Fri 7/8

6:25 p.m.-8:15 p.m.

1 stop26h 50m

C$ 548

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 8/10

8:00 p.m.-10:51 a.m.

2 stops13h 51m

Lambert-St Louis

Wed 14/10

10:15 a.m.-8:15 p.m.

1 stop11h 00m

C$ 549

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 1/10

7:00 a.m.-11:16 p.m.

2 stops15h 16m

Lambert-St Louis

Mon 5/10

6:15 a.m.-6:10 p.m.

2 stops12h 55m

C$ 556

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 21/10

12:20 a.m.-10:51 a.m.

1 stop9h 31m

Lambert-St Louis

Sun 25/10

6:00 a.m.-6:30 p.m.

2 stops13h 30m

C$ 560
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 23/10

12:33 p.m.-12:34 a.m.

1 stop11h 01m

Lambert-St Louis

Sun 25/10

2:22 p.m.-11:04 p.m.

1 stop9h 42m

C$ 562
Cheapest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 20/8

8:00 p.m.-5:22 p.m.

2 stops20h 22m

C$ 259

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/7

Showing 1-10 of 16 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$ 453). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 982). 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 12 July 2026.
Read reviews from past customers who have flown Delta,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.
Delta
7.8
Good
8,458 reviews
Check prices

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Delta
7.8
Good
8,458 reviews
Delta
7.8
Good
8,458 reviews
Check prices

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
WestJet
7.2
Good
3,409 reviews
Delta
7.8
Good
8,458 reviews
Check prices

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Air Canada
7.1
Good
11,328 reviews
Delta
7.8
Good
8,458 reviews
Check prices

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,

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?

    WestJet can get you from Calgary to St. Louis in just under 9h 53m. Your travel time can differ by up to . Airlines will cover a distance of 2297 km.

  • 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$ 267. Additional round-trip tickets that might be worth considering are offered by Delta and WestJet, with the lowest prices starting at C$ 353 and C$ 578, respectively. Air Canada is priced at 63% 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$ 453). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 982). 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.
Calgary to Kansas City flights
Edmonton 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 12 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 267AverageC$ 691FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 353AverageC$ 556FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 578AverageC$ 812FlexibilityNo 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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