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Cheap flights from St. Louis to Calgary from C$ 138

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 26/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYC
26 Feb — 5 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St. Louis to Calgary

Enter your travel dates to find the best prices.

Cheapest flights from St. Louis to Calgary
Explore the most affordable flight options available from St. Louis to Calgary. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 January 2026.

Wed 11/38:12 p.m.
STL
-
YYC
2 stops17h 02m
Multiple Airlines
Wed 18/34:15 p.m.
YYC
-
STL
1 stop19h 00m
Multiple Airlines
Deal found 25/1C$ 657
Mon 3/87:30 p.m.
STL
-
YYC
1 stop16h 02m
Multiple Airlines
Tue 11/810:00 a.m.
YYC
-
STL
1 stop7h 02m
Multiple Airlines
Deal found 26/1C$ 709
Mon 2/34:30 p.m.
STL
-
YYC
1 stop6h 23m
United Airlines
Wed 4/312:33 p.m.
YYC
-
STL
1 stop7h 32m
United Airlines
Deal found 25/1C$ 712
Tue 15/911:51 a.m.
STL
-
YYC
1 stop9h 09m
WestJet
Tue 22/912:30 a.m.
YYC
-
STL
1 stop11h 23m
WestJet
Deal found 27/1C$ 720
Fri 24/76:30 a.m.
STL
-
YYC
2 stops13h 10m
WestJet
Sun 2/810:00 a.m.
YYC
-
STL
1 stop25h 53m
WestJet
Deal found 27/1C$ 723
Tue 7/410:12 a.m.
STL
-
YYC
2 stops13h 50m
Delta
Sun 12/412:30 p.m.
YYC
-
STL
1 stop10h 51m
Delta
Deal found 25/1C$ 726
Sat 30/57:56 p.m.
STL
-
YYC
1 stop15h 45m
Alaska Airlines
Mon 1/611:31 a.m.
YYC
-
STL
1 stop27h 19m
Alaska Airlines
Deal found 27/1C$ 728

Find flight deals from St. Louis to Calgary

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Calgary (YYC). 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 27 January 2026.

Round-trip from

C$ 611

One-way from

C$ 138

Popular in

September

Cheapest in

November

Average price

C$ 865
American Airlines
  • American Airlines
  • 1/3-5/3
  • 2 total stops
  • 22h 29m total
  • St. Louis to Calgary
Search Deals
26/2
  • 26/2
  • 3 total stops
  • 37h 54m total
  • St. Louis to Calgary
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 89 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 19 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 St. Louis to Calgary 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 27 January 2026.
Use the filters below to find and compare flights from St. Louis to Calgary that are best for you.

Fly from

St. Louis

Fly to

Calgary

Route

Depart

Return

Price

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 11/3

8:12 p.m.-12:14 p.m.

2 stops17h 02m

Calgary

Wed 18/3

4:15 p.m.-12:15 p.m.

1 stop19h 00m

C$ 657

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 2/3

4:30 p.m.-9:53 p.m.

1 stop6h 23m

Calgary

Wed 4/3

12:33 p.m.-9:40 p.m.

1 stop8h 07m

C$ 712

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 7/4

12:28 p.m.-8:45 p.m.

1 stop9h 17m

Calgary

Sun 12/4

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

1 stop10h 51m

C$ 712

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 24/7

6:30 a.m.-4:53 p.m.

1 stop11h 23m

Calgary

Sun 2/8

10:00 a.m.-12:53 p.m.

1 stop25h 53m

C$ 720

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sat 30/5

6:30 a.m.-5:00 p.m.

1 stop11h 30m

Calgary

Mon 1/6

10:15 a.m.-11:01 p.m.

1 stop11h 46m

C$ 720

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 15/6

6:45 a.m.-8:05 p.m.

1 stop14h 20m

Calgary

Sat 27/6

6:35 a.m.-11:01 p.m.

1 stop15h 26m

C$ 720

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 29/5

6:30 a.m.-5:00 p.m.

1 stop11h 30m

Calgary

Mon 1/6

10:15 a.m.-11:01 p.m.

1 stop11h 46m

C$ 720

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 19/6

6:45 a.m.-8:05 p.m.

1 stop14h 20m

Calgary

Sat 27/6

10:15 a.m.-11:01 p.m.

1 stop11h 46m

C$ 720

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Thu 26/2

10:11 p.m.-11:05 a.m.

3 stops37h 54m

C$ 138

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sun 15/3

8:06 p.m.-11:10 a.m.

2 stops40h 04m

C$ 246

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/1

Showing 1-10 of 13 results
1
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Best time to book a flight from St. Louis to Calgary

Have a flexible travel schedule? Discover the best time to fly to Calgary from St. Louis 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 St. Louis to Calgary

How far ahead should I book a flight from St. Louis to Calgary?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Calgary. Price data was last updated on 23 January 2026.

The price you pay for your flight from St. Louis to Calgary may vary depending on when you book. For the best chance of a lower fare, look to book 26 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to Calgary?

Currently, April is the cheapest month in which you can book a flight from St. Louis to Calgary (average of C$ 231). Flying from St. Louis to Calgary in August is currently the most expensive (average of C$ 626). 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.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Calgary. 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 St. Louis to Calgary?

    A quick flight from St. Louis to Calgary can take about 6h 23m. United Airlines provides one of the quickest options available for as low as C$ 712. There are 2297 km between St. Louis and Calgary. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from St. Louis to Calgary that include hotel bookings?

    Yes. In addition to deals on St. Louis to Calgary flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Calgary?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Calgary.

  • Can I find deals for business class flights from St. Louis to Calgary?

    Yes. Cheapflights offers flight deals from St. Louis to Calgary 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 St. Louis to Calgary?

    Currently, April is the cheapest month in which you can book a flight from St. Louis to Calgary (average of C$ 231). Flying from St. Louis to Calgary in August is currently the most expensive (average of C$ 626). 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 Calgary?

Book flights to Calgary if you plan to visit one of these locations
Canmore
Radium Hot Springs
Airdrie
Kananaskis
Drumheller

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Alternative routes for St. Louis to Calgary

See prices for flight routes from nearby airports that may be better suited for you.
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How does Cheapflights help users find flights from St. Louis to Calgary?

When you search for this flight from St. Louis to Calgary, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Calgary?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Calgary from St. Louis.

Can Cheapflights find flights from St. Louis to Calgary with no change fees?

Need flexible booking options for your flight to Calgary from St. Louis? 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 St. Louis to Calgary become cheaper?

Of course! You can now track prices for flights from St. Louis to Calgary 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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