Find flights
When to book
Airlines
FAQs

Cheap flights from Calgary to St. Louis from C$ 239

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
20 Apr — 27 Apr1
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 15 April 2025.

Round-trip from

C$ 413

One-way from

C$ 239

Popular in

November

Cheapest in

January

Average price

C$ 598
Air Canada
  • Air Canada
  • 9/9-21/10
  • 2 total stops
  • 13h 09m total
  • Calgary to St. Louis
Search Deals
Air Canada
  • Air Canada
  • 28/9
  • 1 total stop
  • 8h 16m 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$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 15 April 2025.

Tue 9/97:00 a.m.YYC - STL
1 stop7h 16mAir Canada
Tue 21/109:00 a.m.STL - YYC
1 stop5h 53mAir Canada
Deal found 14/4C$ 413
Thu 22/58:30 a.m.YYC - STL
1 stop13h 18mUnited Airlines
Wed 28/55:27 p.m.STL - YYC
1 stop6h 26mUnited Airlines
Deal found 14/4C$ 419
Tue 2/96:29 a.m.YYC - STL
1 stop5h 19mAmerican Airlines
Wed 8/101:54 p.m.STL - YYC
1 stop9h 01mAmerican Airlines
Deal found 14/4C$ 441
Wed 7/52:00 p.m.YYC - STL
2 stops8h 26mDelta
Tue 13/57:30 a.m.STL - YYC
1 stop6h 27mDelta
Deal found 14/4C$ 456
Tue 6/512:30 a.m.YYC - STL
1 stop10h 34mWestJet
Tue 13/511:32 a.m.STL - YYC
2 stops8h 29mWestJet
Deal found 14/4C$ 530
Tue 9/95:05 p.m.YYC - STL
2 stops18h 20mMultiple Airlines
Tue 21/109:15 a.m.STL - YYC
1 stop8h 47mMultiple Airlines
Deal found 14/4C$ 545

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 15 April 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

Tue 9/9

7:00 a.m.-3:16 p.m.

1 stop7h 16m

Lambert-St Louis

Tue 21/10

9:00 a.m.-1:53 p.m.

1 stop5h 53m

C$ 413

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 22/5

8:30 a.m.-10:48 p.m.

1 stop13h 18m

Lambert-St Louis

Wed 28/5

5:27 p.m.-10:53 p.m.

1 stop6h 26m

C$ 419

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 2/9

6:29 a.m.-12:48 p.m.

1 stop5h 19m

Lambert-St Louis

Wed 8/10

1:54 p.m.-9:55 p.m.

1 stop9h 01m

C$ 441

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 7/5

2:00 p.m.-11:26 p.m.

2 stops8h 26m

Lambert-St Louis

Tue 13/5

7:30 a.m.-12:57 p.m.

1 stop6h 27m

C$ 456

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 6/5

12:30 a.m.-12:04 p.m.

1 stop10h 34m

Lambert-St Louis

Tue 13/5

11:32 a.m.-7:01 p.m.

2 stops8h 29m

C$ 530

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 9/9

5:05 p.m.-12:25 p.m.

2 stops18h 20m

Lambert-St Louis

Tue 21/10

9:15 a.m.-5:02 p.m.

1 stop8h 47m

C$ 545

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 28/9

6:00 a.m.-3:16 p.m.

1 stop8h 16m

C$ 239

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 24/6

6:29 a.m.-8:30 p.m.

1 stop13h 01m

C$ 245

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 23/6

12:30 a.m.-1:57 p.m.

1 stop12h 27m

C$ 247

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 24/6

6:45 a.m.-8:40 p.m.

2 stops12h 55m

C$ 265

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/4

Showing 1-10 of 12 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 15 April 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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 15 April 2025.
Delta
8.0
Very good
7,917 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,917 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,656 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
WestJet
7.2
Good
2,805 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.0
Good
9,127 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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$ 413. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at C$ 419 and C$ 441, respectively. Air Canada is priced at 33% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Calgary to St. Louis one-way?

    C$ 239 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from C$ 245 and C$ 265, respectively.

  • 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 Calgary?

Book flights to Calgary if you plan to visit one of these locations
Chesterfield
St. Peters

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Calgary to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Edmonton to Kansas City flights
Calgary to Kansas City flights
Edmonton to St. Louis 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 15 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 338AverageC$ 575FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 379AverageC$ 437FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 446AverageC$ 740FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 504AverageC$ 701FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Calgary to St. Louis. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Calgary to St. Louis for you. Better yet — we are completely free to use.

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.

Can Cheapflights notify me if prices for flights from Calgary to St. Louis become cheaper?

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

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.