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Cheap flights from Calgary to St. Louis from C$ 345

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 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
5 Dec — 12 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Calgary to St. Louis

Enter your travel dates to find the best prices.

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 5 November 2025.

Mon 1/127:35 p.m.YYC - STL
2 stops37h 39mMultiple Airlines
Mon 8/1210:47 a.m.STL - YYC
1 stop25h 57mMultiple Airlines
Deal found 3/11C$ 435
Sat 22/1112:41 p.m.YYC - STL
1 stop11h 05mDelta
Sat 29/116:00 a.m.STL - YYC
1 stop9h 06mDelta
Deal found 3/11C$ 605
Thu 13/1112:45 p.m.YYC - STL
1 stop20h 54mAmerican Airlines
Wed 19/115:58 p.m.STL - YYC
1 stop18h 49mAmerican Airlines
Deal found 3/11C$ 610
Thu 13/1112:41 p.m.YYC - STL
1 stop11h 05mDelta
Wed 19/1111:39 a.m.STL - YYC
2 stops10h 14mDelta
Deal found 3/11C$ 611
Wed 26/1112:37 p.m.YYC - STL
1 stop6h 02mUnited Airlines
Mon 1/129:00 a.m.STL - YYC
1 stop13h 53mUnited Airlines
Deal found 2/11C$ 666
Wed 26/117:45 a.m.YYC - STL
2 stops32h 04mWestJet
Mon 1/125:17 p.m.STL - YYC
1 stop26h 52mWestJet
Deal found 4/11C$ 729
Fri 26/126:15 a.m.YYC - STL
1 stop15h 07mMultiple Airlines
Tue 30/124:05 p.m.STL - YYC
1 stop17h 38mMultiple Airlines
Deal found 3/11C$ 741

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 5 November 2025.

Round-trip from

C$ 435

One-way from

C$ 345

Popular in

November

Cheapest in

January

Average price

C$ 798
1/12-8/12
  • 1/12-8/12
  • 3 total stops
  • 63h 36m total
  • Calgary to St. Louis
Search Deals
United Airlines
  • United Airlines
  • 13/11
  • 1 total stop
  • 6h 41m total
  • Calgary to St. Louis
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 80 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 5 November 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 1/12

7:35 p.m.-10:14 a.m.

2 stops37h 39m

Lambert-St Louis

Mon 8/12

10:47 a.m.-11:44 a.m.

1 stop25h 57m

C$ 435

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 22/11

7:45 a.m.-9:58 p.m.

2 stops13h 13m

Lambert-St Louis

Sat 29/11

6:34 a.m.-11:51 a.m.

1 stop6h 17m

C$ 605

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 26/11

12:37 p.m.-7:39 p.m.

1 stop6h 02m

Lambert-St Louis

Mon 1/12

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

1 stop13h 53m

C$ 666

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 26/11

7:45 a.m.-4:49 p.m.

2 stops32h 04m

Lambert-St Louis

Mon 1/12

5:17 p.m.-7:09 p.m.

1 stop26h 52m

C$ 729

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 4/5

12:25 a.m.-3:16 p.m.

1 stop13h 51m

Lambert-St Louis

Wed 6/5

1:30 p.m.-9:30 p.m.

1 stop9h 00m

C$ 738

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 13/11

2:13 p.m.-9:54 p.m.

1 stop6h 41m

C$ 345

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

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$ 344). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 642). 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 5 November 2025.

It’s typically best to fly out from Calgary to St. Louis in the afternoon. Doing so could potentially save you 31% on the flight price compared to flying in the evening, which is usually more expensive.

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 5 November 2025.
Read reviews from past customers who have flown United Airlines,WestJet, andAir 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.
United Airlines
7.4
Good
9,002 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,002 reviews
United Airlines
7.4
Good
9,002 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
WestJet
7.2
Good
3,153 reviews
United Airlines
7.4
Good
9,002 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,409 reviews
United Airlines
7.4
Good
9,002 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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.

  • How long is the flight from Calgary to St. Louis?

    Delta and United Airlines can get you from Calgary to St. Louis in just under 6h 02m. Your travel time can differ by up to 7h 11m. Airlines will cover a distance of 2297 km. This flight may include one or multiple stops.

  • 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$ 343. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 453 and C$ 580, respectively. Air Canada is priced at 46% 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$ 344). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 642). 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 3 airlines flying from Calgary to St. Louis

Discover the top 3 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 5 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 343AverageC$ 581FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 453AverageC$ 662FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 580AverageC$ 693FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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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.

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