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Cheap flights from Calgary to St. Louis from C$ 249

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
25 Feb — 4 Mar1
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 January 2026.

Sat 16/51:35 p.m.
YYC
-
STL
1 stop9h 13m
American Airlines
Sat 23/59:17 a.m.
STL
-
YYC
1 stop15h 25m
American Airlines
Deal found 26/1C$ 530
Wed 1/47:45 a.m.
YYC
-
STL
2 stops25h 45m
Multiple Airlines
Tue 7/47:00 a.m.
STL
-
YYC
1 stop11h 50m
Multiple Airlines
Deal found 25/1C$ 549
Wed 1/41:30 p.m.
YYC
-
STL
1 stop9h 14m
American Airlines
Tue 7/46:00 a.m.
STL
-
YYC
1 stop7h 54m
American Airlines
Deal found 25/1C$ 566
Mon 16/311:40 p.m.
YYC
-
STL
1 stop14h 49m
Air Canada
Wed 18/34:05 p.m.
STL
-
YYC
1 stop8h 54m
Air Canada
Deal found 26/1C$ 611
Wed 1/47:00 a.m.
YYC
-
STL
2 stops15h 25m
WestJet
Tue 7/46:29 a.m.
STL
-
YYC
2 stops13h 43m
WestJet
Deal found 25/1C$ 642
Sat 16/58:10 a.m.
YYC
-
STL
2 stops7h 35m
WestJet
Sat 23/510:45 a.m.
STL
-
YYC
1 stop10h 20m
WestJet
Deal found 26/1C$ 645
Mon 16/37:00 a.m.
YYC
-
STL
2 stops15h 25m
WestJet
Wed 18/310:12 a.m.
STL
-
YYC
1 stop9h 57m
WestJet
Deal found 26/1C$ 649
Fri 3/412:30 p.m.
YYC
-
STL
1 stop10h 51m
Delta
Mon 6/42:12 p.m.
STL
-
YYC
1 stop9h 50m
Delta
Deal found 24/1C$ 672
Fri 3/46:30 a.m.
YYC
-
STL
2 stops13h 12m
WestJet
Mon 6/45:25 p.m.
STL
-
YYC
2 stops26h 47m
WestJet
Deal found 24/1C$ 681
Thu 29/112:40 p.m.
YYC
-
STL
1 stop7h 58m
Delta
Thu 5/29:59 a.m.
STL
-
YYC
2 stops14h 03m
Delta
Deal found 25/1C$ 740

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 January 2026.

Round-trip from

C$ 530

One-way from

C$ 249

Popular in

November

Cheapest in

February

Average price

C$ 723
American Airlines
  • American Airlines
  • 16/5-23/5
  • 2 total stops
  • 24h 38m total
  • Calgary to St. Louis
Search Deals
3/3
  • 3/3
  • 2 total stops
  • 19h 18m total
  • Calgary to St. Louis
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 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

Sat 16/5

1:35 p.m.-11:48 p.m.

1 stop9h 13m

Lambert-St Louis

Sat 23/5

9:17 a.m.-11:42 p.m.

1 stop15h 25m

C$ 530

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 1/4

7:45 a.m.-10:30 a.m.

2 stops25h 45m

Lambert-St Louis

Tue 7/4

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

1 stop11h 50m

C$ 549

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 1/4

1:30 p.m.-11:44 p.m.

1 stop9h 14m

Lambert-St Louis

Tue 7/4

6:00 a.m.-12:54 p.m.

1 stop7h 54m

C$ 566

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 1/4

7:00 a.m.-11:25 p.m.

2 stops15h 25m

Lambert-St Louis

Tue 7/4

6:29 a.m.-7:12 p.m.

2 stops13h 43m

C$ 642

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 16/5

8:10 a.m.-4:45 p.m.

2 stops7h 35m

Lambert-St Louis

Sat 23/5

5:30 p.m.-7:40 p.m.

2 stops27h 10m

C$ 642

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 16/3

7:00 a.m.-11:25 p.m.

2 stops15h 25m

Lambert-St Louis

Wed 18/3

10:12 a.m.-7:09 p.m.

1 stop9h 57m

C$ 649

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 3/4

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

1 stop10h 51m

Lambert-St Louis

Mon 6/4

2:12 p.m.-11:02 p.m.

1 stop9h 50m

C$ 672

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 3/4

6:30 a.m.-8:42 p.m.

2 stops13h 12m

Lambert-St Louis

Mon 6/4

5:25 p.m.-7:12 p.m.

2 stops26h 47m

C$ 681

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 3/3

7:35 p.m.-3:53 p.m.

2 stops19h 18m

C$ 249

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 3/3

1:40 p.m.-8:41 a.m.

1 stop18h 01m

C$ 268

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/1

Showing 1-10 of 16 results
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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$ 414). Flying from Calgary to St. Louis in December is currently the most expensive (average of C$ 644). 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 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
9,200 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,200 reviews
United Airlines
7.4
Good
9,200 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
WestJet
7.2
Good
3,249 reviews
United Airlines
7.4
Good
9,200 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
10,656 reviews
United Airlines
7.4
Good
9,200 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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?

    American Airlines and WestJet can get you from Calgary to St. Louis in just under 9h 13m. Your travel time can differ by up to 6h 12m. 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$ 358. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 440 and C$ 565, respectively. Air Canada is priced at 45% 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$ 414). Flying from Calgary to St. Louis in December is currently the most expensive (average of C$ 644). 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.
Edmonton to Kansas City flights
Calgary to Kansas City flights
Calgary to Columbia flights
Edmonton to St. Louis flights
Edmonton 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 26 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 358AverageC$ 624FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 440AverageC$ 612FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 565AverageC$ 661FlexibilityNo 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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