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Cheap flights from Calgary to St. Louis from C$ 237

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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
25 Feb — 4 Mar1
1 adult

The best prices from Calgary to Lambert-St Louis are usually found in January or March, booked 82 days in advance, depart on a Sunday or Thursday and return on a Thursday

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 20 February 2025.

Round-trip from

C$ 457

One-way from

C$ 237

Popular in

June

Cheapest in

January

Average price

C$ 587
Delta
  • Delta
  • 2/3-8/3
  • 2 total stops
  • 16h 33m total
  • Calgary to St. Louis
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Air Canada
  • Air Canada
  • 4/4
  • 1 total stop
  • 7h 34m total
  • Calgary to St. Louis
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 116 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 29 potential savings vs. average RT price).
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Average for round-trip flights in February 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 20 February 2025.

Sun 2/36:35 a.m.YYC - STL
1 stop9h 18mDelta
Sat 8/35:00 p.m.STL - YYC
1 stop7h 15mDelta
Deal found 20/2C$ 457
Thu 27/26:14 a.m.YYC - STL
1 stop9h 19mAir Canada
Tue 18/31:45 p.m.STL - YYC
1 stop8h 56mAir Canada
Deal found 20/2C$ 462
Tue 1/46:00 a.m.YYC - STL
2 stops9h 52mWestJet
Wed 16/411:23 a.m.STL - YYC
2 stops8h 42mWestJet
Deal found 20/2C$ 506
Sun 6/411:30 a.m.YYC - STL
2 stops31h 40mMultiple Airlines
Sun 13/412:15 p.m.STL - YYC
2 stops32h 21mMultiple Airlines
Deal found 20/2C$ 531

Find flights from Calgary to St. Louis within your budget

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 20 February 2025.

Fly from

Calgary

Fly to

St. Louis

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 2/3

6:35 a.m.-4:53 p.m.

1 stop9h 18m

Lambert-St Louis

Sat 8/3

5:00 p.m.-11:15 p.m.

1 stop7h 15m

C$ 457

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 1/4

6:00 a.m.-4:52 p.m.

2 stops9h 52m

Lambert-St Louis

Wed 16/4

11:23 a.m.-7:05 p.m.

2 stops8h 42m

C$ 506

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 6/4

11:30 a.m.-8:10 p.m.

2 stops31h 40m

Lambert-St Louis

Sun 13/4

12:15 p.m.-7:36 p.m.

2 stops32h 21m

C$ 531

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 6/6

12:38 p.m.-10:45 p.m.

1 stop9h 07m

Lambert-St Louis

Sun 15/6

1:30 p.m.-11:06 p.m.

1 stop10h 36m

C$ 659

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 4/4

6:15 a.m.-2:49 p.m.

1 stop7h 34m

C$ 237

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 20/3

7:00 a.m.-11:34 a.m.

2 stops27h 34m

C$ 274

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 20/3

6:30 a.m.-4:52 p.m.

1 stop9h 22m

C$ 293

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 19/3

12:20 a.m.-2:49 p.m.

2 stops13h 29m

C$ 378

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/2

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.

Travel insights for flights from Calgary to St. Louis

Get recent, data-driven insights about flights from Calgary to St. Louis including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Calgary to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Calgary to St. Louis. Price data was last updated on 14 February 2025.

The best time to book flights from Calgary to St. Louis is 82 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 20 February 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 20 February 2025.
Read reviews from past customers who have flown Delta, WestJet and Air Canada 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
8,219 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

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
8,219 reviews
Delta
8.0
Very good
8,219 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

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
2,801 reviews
Delta
8.0
Very good
8,219 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

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
8,748 reviews
Delta
8.0
Very good
8,219 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

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 Delta is currently your cheapest option to St. Louis, with prices starting at C$ 457. Additional round-trip tickets that might be worth considering are offered by WestJet and Air Canada, with the lowest prices starting at C$ 506 and C$ 659, respectively. Delta is priced at 27% 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$ 237 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 Delta and WestJet, with prices starting from C$ 293 and C$ 378, 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
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.
Calgary to Kansas City flights
Edmonton to Kansas City flights
Edmonton to St. Louis flights
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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 20 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 322AverageC$ 590FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 379AverageC$ 660FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 388AverageC$ 464FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 546AverageC$ 758FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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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