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Cheap flights from Calgary to St. Louis from C$ 282

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 15/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
25 Jul — 1 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 25 June 2026.

Thu 24/912:20 a.m.
YYC
-
STL
1 stop8h 20m
Multiple Airlines
Mon 28/910:35 a.m.
STL
-
YYC
1 stop12h 15m
Multiple Airlines
Deal found 22/6C$ 493
Fri 18/97:45 a.m.
YYC
-
STL
1 stop8h 52m
Delta
Mon 21/92:25 p.m.
STL
-
YYC
1 stop9h 41m
Delta
Deal found 22/6C$ 498
Thu 23/77:00 a.m.
YYC
-
STL
2 stops8h 46m
WestJet
Sun 26/76:21 a.m.
STL
-
YYC
2 stops14h 19m
WestJet
Deal found 21/6C$ 537
Mon 10/812:20 a.m.
YYC
-
STL
1 stop10h 26m
WestJet
Mon 17/812:52 p.m.
STL
-
YYC
1 stop9h 58m
WestJet
Deal found 23/6C$ 539
Sat 1/87:00 a.m.
YYC
-
STL
2 stops26h 28m
WestJet
Sat 22/86:20 a.m.
STL
-
YYC
2 stops14h 20m
WestJet
Deal found 21/6C$ 542
Thu 16/711:00 a.m.
YYC
-
STL
1 stop21h 31m
WestJet
Tue 21/71:22 p.m.
STL
-
YYC
1 stop9h 28m
WestJet
Deal found 23/6C$ 543
Tue 14/77:00 a.m.
YYC
-
STL
2 stops8h 46m
WestJet
Thu 23/76:30 a.m.
STL
-
YYC
1 stop14h 45m
WestJet
Deal found 23/6C$ 545
Tue 14/77:00 a.m.
YYC
-
STL
2 stops8h 46m
WestJet
Tue 21/711:18 a.m.
STL
-
YYC
2 stops9h 22m
WestJet
Deal found 23/6C$ 546
Wed 14/1012:20 a.m.
YYC
-
STL
1 stop9h 28m
WestJet
Sun 18/106:45 a.m.
STL
-
YYC
1 stop14h 30m
WestJet
Deal found 23/6C$ 549
Sat 8/87:00 a.m.
YYC
-
STL
2 stops26h 23m
WestJet
Sat 15/86:20 a.m.
STL
-
YYC
2 stops14h 20m
WestJet
Deal found 24/6C$ 550

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 25 June 2026.

Round-trip from

C$ 493

One-way from

C$ 282

Popular in

June

Cheapest in

May

Average price

C$ 987
24/9-28/9
  • 24/9-28/9
  • 2 total stops
  • 20h 35m total
  • Calgary to St. Louis
Search Deals
15/8
  • 15/8
  • 1 total stop
  • 9h 38m total
  • Calgary to St. Louis
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 25 June 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
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 18/9

7:45 a.m.-5:37 p.m.

1 stop8h 52m

Lambert-St Louis

Mon 21/9

2:25 p.m.-11:06 p.m.

1 stop9h 41m

C$ 498

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 21/9

10:15 a.m.-11:16 p.m.

1 stop12h 01m

Lambert-St Louis

Thu 1/10

4:59 p.m.-11:00 a.m.

1 stop19h 01m

C$ 553

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 17/7

7:00 a.m.-10:15 p.m.

1 stop14h 15m

Lambert-St Louis

Mon 20/7

5:36 p.m.-7:40 p.m.

2 stops27h 04m

C$ 554

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 31/8

7:00 a.m.-9:20 a.m.

1 stop25h 20m

Lambert-St Louis

Tue 1/9

12:52 p.m.-9:50 p.m.

1 stop9h 58m

C$ 573

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 23/7

7:00 a.m.-8:19 a.m.

1 stop24h 19m

Lambert-St Louis

Thu 30/7

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

1 stop12h 10m

C$ 586
Cheapest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 15/8

8:45 a.m.-7:23 p.m.

1 stop9h 38m

C$ 282

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 1/8

8:45 a.m.-7:23 p.m.

1 stop9h 38m

C$ 289
Quickest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 6/9

6:00 a.m.-4:34 p.m.

1 stop9h 34m

C$ 293

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 13/9

11:05 a.m.-11:16 p.m.

2 stops11h 11m

C$ 296

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 4/8

7:00 a.m.-10:23 a.m.

2 stops26h 23m

C$ 304

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/6

Showing 1-10 of 11 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$ 455). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 987). 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 25 June 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
8,453 reviews
Check prices

Overall

7.8

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Crew

8.5

Food

7.2

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
8,453 reviews
Delta
7.8
Good
8,453 reviews
Check prices

Overall

7.8

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Crew

8.5

Food

7.2

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
3,384 reviews
Delta
7.8
Good
8,453 reviews
Check prices

Overall

7.8

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Crew

8.5

Food

7.2

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
11,261 reviews
Delta
7.8
Good
8,453 reviews
Check prices

Overall

7.8

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Crew

8.5

Food

7.2

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?

    Delta and WestJet can get you from Calgary to St. Louis in just under 8h 52m. Your travel time can differ by up to 3h 09m. 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$ 268. Additional round-trip tickets that might be worth considering are offered by Delta and WestJet, with the lowest prices starting at C$ 326 and C$ 686, respectively. Air Canada is priced at 62% 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$ 455). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 987). 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 St. Louis flights
Edmonton to Columbia flights
Edmonton to Kansas City 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 25 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 268AverageC$ 694FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 326AverageC$ 558FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 686AverageC$ 805FlexibilityNo 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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