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Cheap flights from Calgary to St. Louis from C$ 298

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
25 Apr — 2 May1
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 26 March 2026.

Mon 13/412:29 p.m.
YYC
-
STL
1 stop10h 56m
Delta
Fri 17/42:20 p.m.
STL
-
YYC
1 stop9h 40m
Delta
Deal found 25/3C$ 517
Sun 5/412:30 p.m.
YYC
-
STL
1 stop10h 51m
Delta
Tue 14/42:20 p.m.
STL
-
YYC
1 stop9h 40m
Delta
Deal found 22/3C$ 520
Tue 19/512:34 p.m.
YYC
-
STL
1 stop7h 39m
United Airlines
Wed 27/56:00 a.m.
STL
-
YYC
1 stop6h 32m
United Airlines
Deal found 22/3C$ 521
Fri 22/51:40 p.m.
YYC
-
STL
1 stop5h 50m
American Airlines
Tue 26/56:00 a.m.
STL
-
YYC
1 stop7h 44m
American Airlines
Deal found 26/3C$ 530
Wed 29/47:00 a.m.
YYC
-
STL
1 stop7h 25m
Air Canada
Sat 2/51:05 p.m.
STL
-
YYC
1 stop9h 27m
Air Canada
Deal found 22/3C$ 549
Fri 22/57:00 a.m.
YYC
-
STL
1 stop24h 55m
Multiple Airlines
Tue 26/58:08 p.m.
STL
-
YYC
2 stops21h 52m
Multiple Airlines
Deal found 26/3C$ 583
Thu 28/510:30 a.m.
YYC
-
STL
1 stop8h 39m
Air Canada
Mon 1/67:05 a.m.
STL
-
YYC
1 stop14h 58m
Air Canada
Deal found 23/3C$ 586
Thu 28/58:30 a.m.
YYC
-
STL
1 stop11h 46m
United Airlines
Mon 1/68:15 p.m.
STL
-
YYC
1 stop16h 17m
United Airlines
Deal found 25/3C$ 601
Tue 19/511:05 a.m.
YYC
-
STL
2 stops11h 16m
Delta
Wed 27/510:19 a.m.
STL
-
YYC
1 stop10h 46m
Delta
Deal found 22/3C$ 604
Sat 4/76:45 a.m.
YYC
-
STL
1 stop10h 49m
American Airlines
Sat 25/79:08 a.m.
STL
-
YYC
1 stop15h 32m
American Airlines
Deal found 26/3C$ 614
Fri 12/66:45 a.m.
YYC
-
STL
2 stops12h 54m
Delta
Sun 14/68:49 a.m.
STL
-
YYC
2 stops15h 12m
Delta
Deal found 25/3C$ 616

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 26 March 2026.

Round-trip from

C$ 517

One-way from

C$ 298

Popular in

November

Cheapest in

October

Average price

C$ 701
Delta
  • Delta
  • 13/4-17/4
  • 2 total stops
  • 20h 36m total
  • Calgary to St. Louis
Search Deals
United Airlines
  • United Airlines
  • 9/5
  • 1 total stop
  • 7h 39m 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 26 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

Mon 13/4

12:29 p.m.-12:25 a.m.

1 stop10h 56m

Lambert-St Louis

Fri 17/4

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

1 stop9h 40m

C$ 517
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 17/4

6:00 a.m.-8:54 p.m.

1 stop13h 54m

Lambert-St Louis

Tue 21/4

6:30 a.m.-11:32 a.m.

1 stop6h 02m

C$ 520

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 5/4

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

1 stop10h 51m

Lambert-St Louis

Tue 14/4

9:59 a.m.-11:00 p.m.

2 stops14h 01m

C$ 520

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 28/5

8:30 a.m.-9:16 p.m.

1 stop11h 46m

Lambert-St Louis

Mon 1/6

8:15 p.m.-11:32 a.m.

1 stop16h 17m

C$ 601

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 19/5

11:05 a.m.-11:21 p.m.

2 stops11h 16m

Lambert-St Louis

Wed 27/5

10:19 a.m.-8:05 p.m.

1 stop10h 46m

C$ 604

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 12/6

6:45 a.m.-8:39 p.m.

2 stops12h 54m

Lambert-St Louis

Sun 14/6

8:49 a.m.-11:01 p.m.

2 stops15h 12m

C$ 616

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 29/4

7:00 a.m.-9:13 p.m.

2 stops13h 13m

Lambert-St Louis

Sat 2/5

10:25 a.m.-10:58 p.m.

2 stops13h 33m

C$ 637

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 28/5

12:25 p.m.-11:21 p.m.

2 stops9h 56m

Lambert-St Louis

Mon 1/6

10:19 a.m.-8:05 p.m.

1 stop10h 46m

C$ 656
Cheapest one-way
Quickest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 9/5

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

1 stop7h 39m

C$ 298

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 9/5

7:45 a.m.-11:59 p.m.

2 stops15h 14m

C$ 298

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/3

Showing 1-10 of 17 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$ 412). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 734). 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 26 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
3,303 reviews
Check prices

Food

6.2

Boarding

7.4

Crew

7.9

Entertainment

6.1

Overall

7.2

Comfort

7.0

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
3,303 reviews
WestJet
7.2
Good
3,303 reviews
Check prices

Food

6.2

Boarding

7.4

Crew

7.9

Entertainment

6.1

Overall

7.2

Comfort

7.0

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
10,842 reviews
WestJet
7.2
Good
3,303 reviews
Check prices

Food

6.2

Boarding

7.4

Crew

7.9

Entertainment

6.1

Overall

7.2

Comfort

7.0

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 and United Airlines can get you from Calgary to St. Louis in just under 10h 56m. Your travel time can differ by up to 2h 58m. 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$ 260. Another option worth looking into is WestJet, starting at C$ 568 round trip. Air Canada is priced at 61% 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$ 412). Flying from Calgary to St. Louis in January is currently the most expensive (average of C$ 734). 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.
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Edmonton to Kansas City flights
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Calgary 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 26 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 260AverageC$ 653FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 568AverageC$ 666FlexibilityNo 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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