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Cheap flights from Calgary to St. Louis from C$ 244

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 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
19 Aug — 26 Aug1
1 adult

Cheap 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 14 August 2025.

Round-trip from

C$ 438

One-way from

C$ 244

Popular in

November

Cheapest in

January

Average price

C$ 664
American Airlines
  • American Airlines
  • 8/9-15/9
  • 2 total stops
  • 29h 52m total
  • Calgary to St. Louis
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28/9
  • 28/9
  • 1 total stop
  • 23h 11m total
  • Calgary to St. Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 21 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 Calgary to St. Louis

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 14 August 2025.

Mon 8/96:29 a.m.YYC - STL
1 stop12h 56mAmerican Airlines
Mon 15/97:23 a.m.STL - YYC
1 stop16h 56mAmerican Airlines
Deal found 14/8C$ 438
Fri 29/812:30 a.m.YYC - STL
1 stop12h 03mMultiple Airlines
Sat 6/97:55 p.m.STL - YYC
1 stop27h 15mMultiple Airlines
Deal found 12/8C$ 441
Sat 30/89:15 a.m.YYC - STL
1 stop27h 17mMultiple Airlines
Sun 7/94:00 p.m.STL - YYC
2 stops24h 05mMultiple Airlines
Deal found 12/8C$ 476
Sat 30/89:15 a.m.YYC - STL
1 stop27h 17mMultiple Airlines
Mon 1/92:30 p.m.STL - YYC
1 stop28h 54mMultiple Airlines
Deal found 12/8C$ 498
Wed 3/91:26 p.m.YYC - STL
1 stop25h 26mBritish Airways
Sun 7/96:05 a.m.STL - YYC
1 stop18h 14mBritish Airways
Deal found 12/8C$ 550
Sat 30/812:38 p.m.YYC - STL
1 stop7h 54mUnited Airlines
Sat 6/93:20 p.m.STL - YYC
1 stop8h 33mUnited Airlines
Deal found 12/8C$ 572
Fri 29/86:29 a.m.YYC - STL
1 stop5h 43mAmerican Airlines
Mon 1/95:15 a.m.STL - YYC
1 stop7h 30mAmerican Airlines
Deal found 12/8C$ 585

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 14 August 2025.
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

Mon 8/9

6:29 a.m.-8:25 p.m.

1 stop12h 56m

Lambert-St Louis

Mon 15/9

7:23 a.m.-11:19 p.m.

1 stop16h 56m

C$ 438

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 29/8

12:30 a.m.-1:33 p.m.

1 stop12h 03m

Lambert-St Louis

Sat 6/9

7:55 p.m.-10:10 p.m.

1 stop27h 15m

C$ 441

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 30/8

9:15 a.m.-1:32 p.m.

1 stop27h 17m

Lambert-St Louis

Sun 7/9

4:00 p.m.-3:05 p.m.

2 stops24h 05m

C$ 476

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 30/8

9:15 a.m.-1:32 p.m.

1 stop27h 17m

Lambert-St Louis

Mon 1/9

2:30 p.m.-6:24 p.m.

1 stop28h 54m

C$ 498

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 3/9

1:26 p.m.-3:52 p.m.

1 stop25h 26m

Lambert-St Louis

Sun 7/9

6:05 a.m.-11:19 p.m.

1 stop18h 14m

C$ 550

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 30/8

12:38 p.m.-9:32 p.m.

1 stop7h 54m

Lambert-St Louis

Sat 6/9

3:20 p.m.-10:53 p.m.

1 stop8h 33m

C$ 572

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 28/9

8:55 a.m.-9:06 a.m.

1 stop23h 11m

C$ 244

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 15/11

8:55 a.m.-10:07 a.m.

1 stop24h 12m

C$ 250

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 15/11

6:30 a.m.-11:56 p.m.

2 stops16h 26m

C$ 269

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 26/9

6:29 a.m.-9:53 p.m.

1 stop14h 24m

C$ 294

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/8

Showing 1-10 of 15 results
1
2

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, January is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 365). Flying from Calgary to St. Louis in September is currently the most expensive (average of C$ 491). 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.

What is the cheapest time of day to fly from YYC to STL?

Find hourly flight availability from Calgary to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 August 2025.

It’s typically best to fly out from Calgary to St. Louis in the afternoon. Doing so could potentially save you 32% on the flight price compared to flying in the evening, which is usually more expensive.

What’s the top layover airport for flights from Calgary to St. Louis?

Share of one-stop round-trip flights from Calgary to St. Louis chosen by Cheapflights users in the past 12 months, using the same layover each way.

Denver (DEN) – chosen by Cheapflights users on 45% of one-stop itineraries from Calgary to St. Louis on Cheapflights.

What’s the cheapest layover airport for flights from Calgary to St. Louis?

Average round-trip fare for 1-stop flights from Calgary to St. Louis, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 425.

What’s the fastest layover option from Calgary to St. Louis?

Shortest average travel time for 1-stop one-way flights from Calgary to St. Louis, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Minneapolis (MSP) have the shortest average one-way travel time for 1-stop routes: 5h 40m.

Which airport typically offers the quickest layover for flights from Calgary to St. Louis?

Average layover duration for 1-stop one-way flights from Calgary to St. Louis, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 1h 31m.

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 14 August 2025.
Read reviews from past customers who have flown Delta,United Airlines, andWestJet 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.
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
WestJet
7.2
Good
3,015 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Air Canada
7.1
Good
9,949 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

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.

  • 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$ 336. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at C$ 377 and C$ 443, 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, January is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 365). Flying from Calgary to St. Louis in September is currently the most expensive (average of C$ 491). 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
Chesterfield
St. Peters

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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 St. Louis flights
Calgary to Kansas City flights
Edmonton to Kansas City flights
Edmonton to Columbia flights
Calgary to Columbia flights

Top 4 airlines flying from Calgary to St. Louis

Discover the top 4 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 14 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 336AverageC$ 540FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 377AverageC$ 435FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 443AverageC$ 675FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 524AverageC$ 675FlexibilityNo cancel feeOn-time60%
Search WestJet flights

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How does Cheapflights help users find flights from Calgary to St. Louis?

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

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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.

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