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Cheap flights from St. Louis to Calgary from C$ 204

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYC
26 Aug — 2 Sep1
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 July 2026.

Mon 24/86:17 p.m.
STL
-
YYC
1 stop28h 33m
Multiple Airlines
Mon 31/87:00 a.m.
YYC
-
STL
1 stop9h 22m
Multiple Airlines
Deal found 25/7C$ 435
Mon 5/102:29 p.m.
STL
-
YYC
1 stop8h 21m
Multiple Airlines
Mon 12/1012:20 a.m.
YYC
-
STL
1 stop8h 20m
Multiple Airlines
Deal found 24/7C$ 437
Sun 11/1010:35 a.m.
STL
-
YYC
1 stop25h 25m
Multiple Airlines
Wed 14/1012:20 a.m.
YYC
-
STL
1 stop8h 20m
Multiple Airlines
Deal found 26/7C$ 438
Tue 20/1010:35 a.m.
STL
-
YYC
1 stop25h 25m
Multiple Airlines
Fri 23/1012:20 a.m.
YYC
-
STL
1 stop8h 20m
Multiple Airlines
Deal found 22/7C$ 461
Thu 8/1010:35 a.m.
STL
-
YYC
1 stop25h 25m
Multiple Airlines
Tue 3/1112:30 a.m.
YYC
-
STL
1 stop8h 10m
Multiple Airlines
Deal found 23/7C$ 466
Mon 31/86:17 p.m.
STL
-
YYC
1 stop28h 33m
Multiple Airlines
Sun 6/98:45 a.m.
YYC
-
STL
1 stop9h 28m
Multiple Airlines
Deal found 22/7C$ 475
Fri 28/86:17 p.m.
STL
-
YYC
1 stop17h 43m
Multiple Airlines
Mon 31/87:00 a.m.
YYC
-
STL
1 stop9h 22m
Multiple Airlines
Deal found 22/7C$ 489

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 July 2026.

Round-trip from

C$ 435

One-way from

C$ 204

Popular in

February

Cheapest in

April

Average price

C$ 1,023
24/8-31/8
  • 24/8-31/8
  • 2 total stops
  • 37h 55m total
  • St. Louis to Calgary
Search Deals
5/10
  • 5/10
  • 1 total stop
  • 8h 21m total
  • St. Louis to Calgary
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 93 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 42 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 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 July 2026.
Use the filters below to find and compare flights from St. Louis to Calgary that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sun 11/10

10:35 a.m.-11:00 a.m.

1 stop25h 25m

Calgary

Thu 15/10

6:50 p.m.-9:40 a.m.

2 stops13h 50m

C$ 468

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 31/8

6:17 p.m.-9:50 p.m.

1 stop28h 33m

Calgary

Sun 6/9

8:45 a.m.-7:13 p.m.

1 stop9h 28m

C$ 475

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Thu 10/9

10:35 a.m.-11:00 a.m.

1 stop25h 25m

Calgary

Mon 14/9

8:45 a.m.-7:15 p.m.

1 stop9h 30m

C$ 493

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 17/8

4:57 p.m.-3:15 p.m.

2 stops23h 18m

Calgary

Fri 21/8

7:00 a.m.-5:22 p.m.

1 stop9h 22m

C$ 514

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sun 11/10

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

1 stop12h 10m

Calgary

Thu 15/10

7:00 a.m.-9:09 a.m.

1 stop25h 09m

C$ 588

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 15/9

6:40 a.m.-8:15 p.m.

1 stop14h 35m

Calgary

Wed 23/9

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

1 stop12h 01m

C$ 589

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 26/8

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

1 stop10h 42m

Calgary

Sun 30/8

7:00 a.m.-11:58 p.m.

1 stop15h 58m

C$ 610
Quickest round-trip

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 7/10

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

2 stops13h 10m

Calgary

Sun 11/10

8:00 p.m.-8:49 a.m.

2 stops11h 49m

C$ 644

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sat 29/8

6:20 a.m.-8:40 p.m.

2 stops15h 20m

Calgary

Fri 4/9

9:35 a.m.-11:58 p.m.

2 stops13h 23m

C$ 644

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 28/8

5:34 p.m.-7:40 p.m.

2 stops27h 06m

Calgary

Fri 4/9

7:00 a.m.-11:26 p.m.

2 stops15h 26m

C$ 655

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/7

Showing 1-10 of 15 resultsSorted by cheapest first
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?

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 86 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$ 788). Flying from St. Louis to Calgary in February is currently the most expensive (average of C$ 1,277). 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 St. Louis to Calgary?

Airfare is below average for this route at the moment.

St. Louis to Calgary flights typically cost between C$ 807 and C$ 1,064 in August.
The cheapest round-trip price found within the last 5 days was C$ 435 on Multiple Airlines (24 Aug-31 Aug).

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.

  • 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$ 788). Flying from St. Louis to Calgary in February is currently the most expensive (average of C$ 1,277). 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
Kananaskis
Airdrie
Drumheller

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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.

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