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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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
22 Aug — 29 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 23 July 2026.

Fri 2/107:00 a.m.
YYC
-
STL
1 stop25h 40m
Multiple Airlines
Tue 6/1010:35 a.m.
STL
-
YYC
1 stop25h 25m
Multiple Airlines
Deal found 23/7C$ 457
Tue 18/88:45 a.m.
YYC
-
STL
2 stops55h 37m
Multiple Airlines
Mon 24/86:17 p.m.
STL
-
YYC
1 stop17h 43m
Multiple Airlines
Deal found 20/7C$ 492
Tue 1/97:00 a.m.
YYC
-
STL
2 stops15h 26m
WestJet
Tue 8/911:21 a.m.
STL
-
YYC
2 stops14h 23m
WestJet
Deal found 18/7C$ 500
Wed 26/88:00 p.m.
YYC
-
STL
2 stops12h 54m
WestJet
Tue 1/911:13 a.m.
STL
-
YYC
2 stops9h 27m
WestJet
Deal found 20/7C$ 505
Tue 8/99:00 p.m.
YYC
-
STL
2 stops11h 34m
WestJet
Tue 22/96:15 a.m.
STL
-
YYC
2 stops10h 55m
WestJet
Deal found 21/7C$ 507
Tue 18/811:50 p.m.
YYC
-
STL
2 stops12h 24m
WestJet
Mon 24/86:20 a.m.
STL
-
YYC
2 stops15h 20m
WestJet
Deal found 20/7C$ 516

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 23 July 2026.

Round-trip from

C$ 457

One-way from

C$ 244

Popular in

June

Cheapest in

May

Average price

C$ 827
2/10-6/10
  • 2/10-6/10
  • 2 total stops
  • 51h 05m total
  • Calgary to St. Louis
Search Deals
12/10
  • 12/10
  • 1 total stop
  • 8h 20m 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 23 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

Wed 26/8

8:00 p.m.-9:54 a.m.

2 stops12h 54m

Lambert-St Louis

Tue 1/9

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

2 stops9h 27m

C$ 505

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 1/9

11:00 a.m.-9:37 a.m.

1 stop21h 37m

Lambert-St Louis

Tue 8/9

11:21 a.m.-7:40 p.m.

2 stops9h 19m

C$ 510

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 8/9

9:00 p.m.-12:32 p.m.

2 stops14h 32m

Lambert-St Louis

Tue 22/9

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

2 stops10h 55m

C$ 517

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 17/8

12:20 a.m.-4:17 p.m.

1 stop14h 57m

Lambert-St Louis

Mon 24/8

10:33 a.m.-8:15 p.m.

1 stop10h 42m

C$ 519
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 29/8

12:20 a.m.-9:54 a.m.

1 stop8h 34m

Lambert-St Louis

Mon 31/8

6:00 a.m.-5:10 p.m.

1 stop12h 10m

C$ 569
Cheapest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 26/8

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

2 stops20h 22m

C$ 264

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 29/8

12:20 a.m.-5:22 p.m.

1 stop16h 02m

C$ 266

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 13/9

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

2 stops15h 16m

C$ 297
Quickest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/11

7:45 a.m.-10:18 p.m.

1 stop14h 33m

C$ 299

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 13/10

8:45 a.m.-9:40 a.m.

2 stops23h 55m

C$ 304

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/7

Sorted by cheapest first

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$ 451). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 978). 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 23 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
8,479 reviews
Check prices

Comfort

7.8

Food

7.2

Crew

8.5

Entertainment

7.8

Boarding

8.1

Overall

7.8

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
8,479 reviews
Delta
7.8
Good
8,479 reviews
Check prices

Comfort

7.8

Food

7.2

Crew

8.5

Entertainment

7.8

Boarding

8.1

Overall

7.8

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
3,411 reviews
Delta
7.8
Good
8,479 reviews
Check prices

Comfort

7.8

Food

7.2

Crew

8.5

Entertainment

7.8

Boarding

8.1

Overall

7.8

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
11,371 reviews
Delta
7.8
Good
8,479 reviews
Check prices

Comfort

7.8

Food

7.2

Crew

8.5

Entertainment

7.8

Boarding

8.1

Overall

7.8

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 12h 54m. 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$ 266. Additional round-trip tickets that might be worth considering are offered by Delta and WestJet, with the lowest prices starting at C$ 352 and C$ 650, 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$ 451). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 978). 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 23 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 266AverageC$ 688FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 352AverageC$ 553FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 650AverageC$ 810FlexibilityNo 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?

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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