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Cheap flights from Calgary to St. Louis from C$ 244

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 27/2. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
11 Feb — 18 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 January 2026.

Round-trip from

C$ 396

One-way from

C$ 244

Popular in

November

Cheapest in

February

Average price

C$ 655
2/2-8/2
  • 2/2-8/2
  • 3 total stops
  • 55h 07m total
  • Calgary to St. Louis
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27/2
  • 27/2
  • 1 total stop
  • 24h 31m total
  • Calgary to St. Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 18 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find 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 January 2026.

Mon 2/212:30 a.m.
YYC
-
STL
1 stop29h 21m
Multiple Airlines
Sun 8/25:42 p.m.
STL
-
YYC
2 stops25h 46m
Multiple Airlines
Deal found 11/1C$ 396
Mon 2/212:30 a.m.
YYC
-
STL
1 stop29h 21m
Multiple Airlines
Tue 10/23:49 p.m.
STL
-
YYC
1 stop30h 30m
Multiple Airlines
Deal found 11/1C$ 404
Mon 2/212:20 p.m.
YYC
-
STL
2 stops34h 13m
Multiple Airlines
Sun 8/25:42 p.m.
STL
-
YYC
1 stop18h 37m
Multiple Airlines
Deal found 11/1C$ 484
Tue 10/21:40 p.m.
YYC
-
STL
1 stop24h 10m
American Airlines
Tue 17/26:00 a.m.
STL
-
YYC
1 stop8h 00m
American Airlines
Deal found 12/1C$ 533
Tue 3/312:30 a.m.
YYC
-
STL
2 stops20h 57m
Multiple Airlines
Sun 8/37:00 a.m.
STL
-
YYC
1 stop11h 50m
Multiple Airlines
Deal found 11/1C$ 537
Tue 3/26:30 a.m.
YYC
-
STL
2 stops13h 13m
Delta
Tue 10/29:59 a.m.
STL
-
YYC
2 stops14h 03m
Delta
Deal found 11/1C$ 552
Wed 4/35:35 a.m.
YYC
-
STL
1 stop8h 54m
Air Canada
Sun 8/34:05 p.m.
STL
-
YYC
1 stop10h 09m
Air Canada
Deal found 12/1C$ 568
Tue 10/27:40 a.m.
YYC
-
STL
2 stops12h 03m
Delta
Tue 17/23:40 p.m.
STL
-
YYC
1 stop6h 14m
Delta
Deal found 12/1C$ 640

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 January 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

Mon 2/2

12:30 a.m.-6:51 a.m.

1 stop29h 21m

Lambert-St Louis

Sun 8/2

5:42 p.m.-6:28 p.m.

2 stops25h 46m

C$ 396

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 2/2

12:30 a.m.-6:51 a.m.

1 stop29h 21m

Lambert-St Louis

Tue 10/2

3:49 p.m.-9:19 p.m.

1 stop30h 30m

C$ 404

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 9/2

12:30 a.m.-6:51 a.m.

1 stop29h 21m

Lambert-St Louis

Tue 17/2

3:49 p.m.-5:02 p.m.

2 stops50h 13m

C$ 428

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 2/2

12:20 p.m.-11:33 p.m.

2 stops34h 13m

Lambert-St Louis

Sun 8/2

5:42 p.m.-11:19 a.m.

1 stop18h 37m

C$ 484

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 3/3

12:30 a.m.-10:27 p.m.

2 stops20h 57m

Lambert-St Louis

Sun 8/3

7:00 a.m.-5:50 p.m.

1 stop11h 50m

C$ 537

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 3/2

6:30 a.m.-8:43 p.m.

2 stops13h 13m

Lambert-St Louis

Tue 10/2

9:59 a.m.-11:02 p.m.

2 stops14h 03m

C$ 552

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 4/3

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

1 stop8h 54m

Lambert-St Louis

Sun 8/3

4:05 p.m.-1:14 a.m.

1 stop10h 09m

C$ 568

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 27/2

9:00 a.m.-11:41 a.m.

2 stops25h 41m

C$ 244

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 4/7

6:45 a.m.-4:33 p.m.

1 stop8h 48m

C$ 355

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 17/6

7:15 a.m.-6:00 p.m.

1 stop9h 45m

C$ 361

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

Showing 1-10 of 16 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$ 419). Flying from Calgary to St. Louis in December is currently the most expensive (average of C$ 652). 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 January 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
9,144 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,144 reviews
United Airlines
7.4
Good
9,144 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
WestJet
7.2
Good
3,236 reviews
United Airlines
7.4
Good
9,144 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Air Canada
7.1
Good
10,616 reviews
United Airlines
7.4
Good
9,144 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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.

  • 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$ 420. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 446 and C$ 572, respectively. Air Canada is priced at 35% 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$ 419). Flying from Calgary to St. Louis in December is currently the most expensive (average of C$ 652). 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
St. Peters

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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
Edmonton 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 12 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 420AverageC$ 581FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 446AverageC$ 620FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 572AverageC$ 678FlexibilityNo 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?

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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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