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Cheap flights from Calgary to St. Louis from C$ 205

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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
17 Jun — 24 Jun1
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 12 June 2025.

Round-trip from

C$ 421

One-way from

C$ 205

Popular in

November

Cheapest in

January

Average price

C$ 632
9/7-13/7
  • 9/7-13/7
  • 3 total stops
  • 57h 50m total
  • Calgary to St. Louis
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9/7
  • 9/7
  • 1 total stop
  • 20h 37m total
  • Calgary to St. Louis
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Highest demand for flights based on searches. 5% potential increase in price (C$ 46 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
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Average for round-trip flights in June 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 12 June 2025.

Wed 9/79:15 a.m.YYC - STL
1 stop23h 37mMultiple Airlines
Sun 13/710:47 a.m.STL - YYC
2 stops34h 13mMultiple Airlines
Deal found 10/6C$ 421
Tue 15/712:30 a.m.YYC - STL
1 stop14h 48mWestJet
Sat 19/71:23 p.m.STL - YYC
1 stop22h 56mWestJet
Deal found 10/6C$ 592
Wed 9/77:00 a.m.YYC - STL
2 stops8h 42mDelta
Sun 13/72:23 p.m.STL - YYC
1 stop9h 34mDelta
Deal found 11/6C$ 636
Fri 13/61:27 p.m.YYC - STL
1 stop6h 03mAmerican Airlines
Mon 23/67:20 a.m.STL - YYC
1 stop17h 09mAmerican Airlines
Deal found 11/6C$ 655

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 12 June 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

Wed 9/7

9:15 a.m.-9:52 a.m.

1 stop23h 37m

Lambert-St Louis

Sun 13/7

10:47 a.m.-8:00 p.m.

2 stops34h 13m

C$ 421

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 15/7

12:30 a.m.-4:18 p.m.

1 stop14h 48m

Lambert-St Louis

Sat 19/7

1:23 p.m.-11:19 a.m.

1 stop22h 56m

C$ 592

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 9/7

7:00 a.m.-4:42 p.m.

2 stops8h 42m

Lambert-St Louis

Sun 13/7

2:23 p.m.-10:57 p.m.

1 stop9h 34m

C$ 636

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 9/7

12:15 p.m.-9:52 a.m.

1 stop20h 37m

C$ 205

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 29/9

6:29 a.m.-11:48 p.m.

1 stop16h 19m

C$ 257

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 22/8

6:00 a.m.-3:21 p.m.

1 stop8h 21m

C$ 279

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 29/9

6:35 a.m.-8:35 p.m.

2 stops13h 00m

C$ 283

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 8/7

12:30 a.m.-9:41 a.m.

1 stop8h 11m

C$ 332

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 22/8

3:49 p.m.-3:44 p.m.

3 stops22h 55m

C$ 488

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

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 12 June 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 12 June 2025.
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
2,868 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
9,531 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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 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 WestJet is currently your cheapest option to St. Louis, with prices starting at C$ 592. Another option worth looking into is Delta, starting at C$ 636 round trip. WestJet is priced at 2% 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$ 257 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from C$ 279 and C$ 283, 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

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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 Kansas City flights
Calgary to Kansas City flights
Edmonton to St. Louis flights
Calgary to Columbia flights
Edmonton 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 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 333AverageC$ 560FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 374AverageC$ 431FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 440AverageC$ 730FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 498AverageC$ 646FlexibilityNo cancel feeOn-time60%
Search WestJet flights

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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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