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Cheap flights from Calgary to St. Louis from C$ 218

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
13 Apr — 20 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 14 March 2026.

Mon 13/412:30 a.m.
YYC
-
STL
1 stop29h 20m
Multiple Airlines
Sat 18/48:23 p.m.
STL
-
YYC
1 stop23h 46m
Multiple Airlines
Deal found 11/3C$ 426
Sat 25/412:30 a.m.
YYC
-
STL
1 stop29h 20m
Multiple Airlines
Sun 3/54:59 p.m.
STL
-
YYC
2 stops19h 01m
Multiple Airlines
Deal found 12/3C$ 513
Sat 2/51:40 p.m.
YYC
-
STL
1 stop9h 06m
American Airlines
Mon 11/58:03 p.m.
STL
-
YYC
1 stop17h 56m
American Airlines
Deal found 12/3C$ 530
Sat 16/51:40 p.m.
YYC
-
STL
1 stop9h 16m
American Airlines
Sat 23/59:08 a.m.
STL
-
YYC
1 stop15h 30m
American Airlines
Deal found 13/3C$ 556
Thu 23/47:40 a.m.
YYC
-
STL
2 stops14h 33m
Delta
Thu 30/42:20 p.m.
STL
-
YYC
1 stop9h 40m
Delta
Deal found 9/3C$ 573
Tue 31/31:30 p.m.
YYC
-
STL
1 stop23h 09m
American Airlines
Sat 4/44:13 p.m.
STL
-
YYC
1 stop20h 31m
American Airlines
Deal found 9/3C$ 577
Wed 1/46:00 a.m.
YYC
-
STL
1 stop9h 56m
United Airlines
Sat 4/46:30 a.m.
STL
-
YYC
1 stop6h 02m
United Airlines
Deal found 9/3C$ 580
Tue 14/46:40 a.m.
YYC
-
STL
2 stops15h 56m
Delta
Fri 17/42:20 p.m.
STL
-
YYC
1 stop9h 40m
Delta
Deal found 11/3C$ 588
Sat 2/58:00 p.m.
YYC
-
STL
2 stops33h 50m
Multiple Airlines
Mon 11/55:27 p.m.
STL
-
YYC
1 stop18h 33m
Multiple Airlines
Deal found 12/3C$ 592

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 14 March 2026.

Round-trip from

C$ 426

One-way from

C$ 218

Popular in

November

Cheapest in

October

Average price

C$ 695
13/4-18/4
  • 13/4-18/4
  • 2 total stops
  • 53h 06m total
  • Calgary to St. Louis
Search Deals
27/4
  • 27/4
  • 2 total stops
  • 32h 50m total
  • Calgary to St. Louis
Search Deals
High demand for flights, 3% potential price rise
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 14 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

Cheapest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 23/4

7:40 a.m.-11:13 p.m.

2 stops14h 33m

Lambert-St Louis

Thu 30/4

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

1 stop9h 40m

C$ 573

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 14/4

7:40 a.m.-11:36 p.m.

2 stops14h 56m

Lambert-St Louis

Fri 17/4

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

1 stop9h 40m

C$ 580

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 2/5

8:00 p.m.-6:50 a.m.

2 stops33h 50m

Lambert-St Louis

Mon 11/5

5:27 p.m.-11:00 a.m.

1 stop18h 33m

C$ 592

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 16/5

12:34 p.m.-9:13 p.m.

1 stop7h 39m

Lambert-St Louis

Sun 24/5

9:23 a.m.-10:37 p.m.

1 stop14h 14m

C$ 606
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 13/5

6:00 a.m.-8:43 p.m.

1 stop13h 43m

Lambert-St Louis

Sun 24/5

6:00 a.m.-11:32 a.m.

1 stop6h 32m

C$ 606
Cheapest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 23/4

1:40 p.m.-11:46 p.m.

1 stop9h 06m

C$ 298

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 24/4

7:50 a.m.-7:32 p.m.

3 stops34h 42m

C$ 298

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 25/4

1:40 p.m.-11:46 p.m.

1 stop9h 06m

C$ 308

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 24/4

1:40 p.m.-8:27 a.m.

1 stop17h 47m

C$ 322

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 23/4

9:00 a.m.-6:50 a.m.

3 stops44h 50m

C$ 331

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

Showing 1-10 of 15 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$ 409). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 728). 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 14 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
3,295 reviews
Check prices

Crew

7.9

Boarding

7.4

Food

6.2

Overall

7.2

Comfort

7.0

Entertainment

6.1

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
3,295 reviews
WestJet
7.2
Good
3,295 reviews
Check prices

Crew

7.9

Boarding

7.4

Food

6.2

Overall

7.2

Comfort

7.0

Entertainment

6.1

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
10,800 reviews
WestJet
7.2
Good
3,295 reviews
Check prices

Crew

7.9

Boarding

7.4

Food

6.2

Overall

7.2

Comfort

7.0

Entertainment

6.1

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 can get you from Calgary to St. Louis in just under 14h 33m. 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$ 358. Another option worth looking into is WestJet, starting at C$ 564 round trip. Air Canada is priced at 46% 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$ 409). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 728). 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.
Calgary to Kansas City flights
Edmonton to St. Louis flights
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Edmonton 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 14 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 258AverageC$ 646FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 564AverageC$ 660FlexibilityNo 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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