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Cheap flights from St. Louis to Calgary from C$ 144

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYC
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Lambert-St Louis to Calgary are usually found in January or April, booked 26 days in advance, depart on a Thursday or Wednesday and return on a Sunday

Find 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 29 October 2025.

Tue 18/117:45 p.m.STL - YYC
2 stops16h 59mMultiple Airlines
Sat 22/1112:30 a.m.YYC - STL
1 stop12h 59mMultiple Airlines
Deal found 28/10C$ 447
Mon 17/117:45 p.m.STL - YYC
2 stops16h 59mMultiple Airlines
Sat 22/111:25 p.m.YYC - STL
1 stop9h 29mMultiple Airlines
Deal found 27/10C$ 492
Fri 19/128:42 p.m.STL - YYC
1 stop27h 10mMultiple Airlines
Wed 7/18:55 a.m.YYC - STL
1 stop23h 52mMultiple Airlines
Deal found 28/10C$ 569
Sat 13/127:43 p.m.STL - YYC
2 stops17h 01mMultiple Airlines
Sat 20/128:55 a.m.YYC - STL
1 stop23h 45mMultiple Airlines
Deal found 28/10C$ 662
Wed 24/125:19 p.m.STL - YYC
1 stop19h 42mMultiple Airlines
Wed 31/129:45 p.m.YYC - STL
2 stops10h 55mMultiple Airlines
Deal found 28/10C$ 665
Mon 24/114:15 p.m.STL - YYC
1 stop19h 35mMultiple Airlines
Fri 28/116:35 a.m.YYC - STL
1 stop9h 14mMultiple Airlines
Deal found 29/10C$ 755

Cheap 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 29 October 2025.

Round-trip from

C$ 447

One-way from

C$ 144

Popular in

September

Cheapest in

January

Average price

C$ 752
18/11-22/11
  • 18/11-22/11
  • 3 total stops
  • 29h 58m total
  • St. Louis to Calgary
Search Deals
12/12
  • 12/12
  • 1 total stop
  • 9h 27m total
  • St. Louis to Calgary
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 29 October 2025.
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

Mon 17/11

7:45 p.m.-11:44 a.m.

2 stops16h 59m

Calgary

Sat 22/11

1:25 p.m.-11:54 p.m.

1 stop9h 29m

C$ 492

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 18/11

7:45 p.m.-11:44 a.m.

2 stops16h 59m

Calgary

Sun 23/11

7:35 p.m.-3:08 p.m.

1 stop18h 33m

C$ 509

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 19/12

8:42 p.m.-10:52 p.m.

1 stop27h 10m

Calgary

Wed 7/1

9:45 p.m.-9:47 a.m.

2 stops11h 02m

C$ 553

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 14/1

6:00 a.m.-9:58 p.m.

2 stops16h 58m

Calgary

Sat 24/1

1:40 p.m.-6:14 p.m.

1 stop27h 34m

C$ 598

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sat 13/12

7:43 p.m.-11:44 a.m.

2 stops17h 01m

Calgary

Sat 20/12

8:55 a.m.-9:40 a.m.

1 stop23h 45m

C$ 662

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 3/3

7:00 a.m.-6:17 p.m.

1 stop12h 17m

Calgary

Wed 4/3

6:55 p.m.-1:52 p.m.

1 stop17h 57m

C$ 742

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 12/12

10:42 a.m.-7:09 p.m.

1 stop9h 27m

C$ 144

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sun 15/2

8:21 a.m.-11:35 a.m.

1 stop28h 14m

C$ 285

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sun 15/2

10:42 a.m.-4:15 p.m.

2 stops30h 33m

C$ 316

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sun 15/3

10:42 a.m.-7:15 p.m.

2 stops33h 33m

C$ 394

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 14 results
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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 24 October 2025.

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, January is the cheapest month in which you can book a flight from St. Louis to Calgary (average of C$ 221). Flying from St. Louis to Calgary in August is currently the most expensive (average of C$ 639). 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?

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 16h 58m. American Airlines provides one of the quickest options available for as low as C$ 598. There are 2297 km between St. Louis and Calgary.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Calgary (average of C$ 221). Flying from St. Louis to Calgary in August is currently the most expensive (average of C$ 639). 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
Drumheller
Kananaskis

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

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