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$137+ Cheap flights from St. Louis (STL) to Calgary (YYC)

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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYC
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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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 Tuesday or Saturday and return on a Friday

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 August 18, 2025.

Round-trip from

$272
(Kiwi.com)

One-way from

$137
(American Airlines)

Popular in

September

Cheapest in

January

Average price

$572
From Lambert-St Louis to Calgary
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One-way flight from Lambert-St Louis to Calgary
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Highest demand for flights based on searches. 1% potential increase in price ($11 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from St. Louis to Calgary

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 August 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/37:54 pmSTL - YYC
1 stop19h 51mMultiple Airlines
Sun 9/78:55 amYYC - STL
1 stop23h 11mMultiple Airlines
Deal found 8/18$272
This Kiwi.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1410:35 amSTL - YYC
2 stops35h 57mMultiple Airlines
Sat 9/2012:30 amYYC - STL
1 stop13h 34mMultiple Airlines
Deal found 8/16$296
This Kiwi.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/284:00 pmSTL - YYC
1 stop20h 19mMultiple Airlines
Sat 10/411:35 pmYYC - STL
2 stops38h 29mMultiple Airlines
Deal found 8/16$302
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:45 pmSTL - YYC
2 stops17h 16mMultiple Airlines
Thu 11/1312:30 amYYC - STL
1 stop14h 04mMultiple Airlines
Deal found 8/17$312
This American Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/96:10 amSTL - YYC
1 stop18h 09mAmerican Airlines
Tue 9/166:29 amYYC - STL
1 stop14h 24mAmerican Airlines
Deal found 8/17$326
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:55 pmSTL - YYC
1 stop27h 15mMultiple Airlines
Tue 9/97:35 pmYYC - STL
2 stops12h 31mMultiple Airlines
Deal found 8/17$336
This American Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/239:56 amSTL - YYC
1 stop14h 23mAmerican Airlines
Fri 9/261:26 pmYYC - STL
1 stop19h 00mAmerican Airlines
Deal found 8/17$339

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 2,558,603 searches. Data last updated August 18, 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

Wed 9/3

7:54 pm-2:45 pm

1 stop19h 51m

Calgary

Sun 9/7

8:55 am-9:06 am

1 stop23h 11m

$272

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sun 9/14

10:35 am-9:32 pm

2 stops35h 57m

Calgary

Sat 9/20

12:30 am-3:04 pm

1 stop13h 34m

$296

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sun 9/28

4:00 pm-11:19 am

1 stop20h 19m

Calgary

Sat 10/4

11:35 pm-3:04 pm

2 stops38h 29m

$302

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 11/11

7:45 pm-12:01 pm

2 stops17h 16m

Calgary

Thu 11/13

12:30 am-3:34 pm

1 stop14h 04m

$312

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 9/9

6:10 am-11:19 pm

1 stop18h 09m

Calgary

Tue 9/16

6:29 am-9:53 pm

1 stop14h 24m

$326

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 9/23

9:56 am-11:19 pm

1 stop14h 23m

Calgary

Tue 9/30

6:29 am-9:53 pm

1 stop14h 24m

$326

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 9/30

6:10 am-11:19 pm

1 stop18h 09m

Calgary

Tue 10/7

1:29 pm-1:44 pm

1 stop23h 15m

$326

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sat 9/6

7:55 pm-10:10 pm

1 stop27h 15m

Calgary

Tue 9/9

7:35 pm-9:06 am

2 stops12h 31m

$336

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 9/30

1:53 pm-11:19 pm

1 stop10h 26m

$137

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 9/22

4:00 pm-3:05 pm

2 stops24h 05m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 16 results
1
2

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 August 8, 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 $300). Flying from St. Louis to Calgary in February is currently the most expensive (average of $402). 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.

Reviews of airlines servicing Calgary

Get insights into the airlines that provide service to Calgary. 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 Calgary. Reviews last updated August 18, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from St. Louis to Calgary by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,925 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
3,018 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,992 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines flying from St. Louis to Calgary round-trip?

    Cheapflights users have booked flights from St. Louis to Calgary round-trip from $168. Other airlines that can offer you cheap pricing are Delta, from $168, and United Airlines, from $343. Users have found that Air Canada is 70% cheaper than the other options available to this destination.

  • 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 $300). Flying from St. Louis to Calgary in February is currently the most expensive (average of $402). 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

Traveling to a place near Calgary?

Book flights to Calgary if you plan to visit one of these locations
Canmore
Airdrie

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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.
Kansas City to Calgary flights
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Top 5 airlines flying from St. Louis to Calgary

Discover the top 5 airlines that operate flights from St. Louis to Calgary. 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 2,558,603 searches. Data last updated August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$168Average$568FlexibilityNo cancel feeOn-time67%
DeltaCheapest$168Average$442FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$343Average$649FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$383Average$553FlexibilityNo cancel feeOn-time71%
WestJetCheapest$459Average$637FlexibilityNo cancel feeOn-time60%

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