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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 13/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
13 Nov — 20 Nov1
1 adult
1 adult, Economy

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 14 October 2025.

Sat 25/1012:05 p.m.YYC - STL
2 stops20h 02mMultiple Airlines
Fri 31/104:52 p.m.STL - YYC
1 stop27h 17mMultiple Airlines
Deal found 12/10C$ 462
Fri 28/116:35 a.m.YYC - STL
1 stop9h 14mMultiple Airlines
Fri 5/126:26 p.m.STL - YYC
2 stops21h 44mMultiple Airlines
Deal found 14/10C$ 593
Sat 25/101:30 p.m.YYC - STL
1 stop6h 16mUnited Airlines
Fri 31/105:24 p.m.STL - YYC
1 stop19h 11mUnited Airlines
Deal found 12/10C$ 594
Sat 25/106:45 a.m.YYC - STL
2 stops10h 17mDelta
Fri 31/1010:30 a.m.STL - YYC
2 stops11h 17mDelta
Deal found 12/10C$ 610
Thu 27/1112:30 a.m.YYC - STL
1 stop8h 19mDelta
Fri 5/126:00 a.m.STL - YYC
2 stops12h 50mDelta
Deal found 14/10C$ 697
Fri 24/101:10 a.m.YYC - STL
2 stops13h 34mAir Canada
Fri 31/106:30 a.m.STL - YYC
1 stop6h 05mAir Canada
Deal found 12/10C$ 709
Thu 27/1112:15 a.m.YYC - STL
2 stops17h 20mWestJet
Fri 5/125:12 p.m.STL - YYC
2 stops22h 58mWestJet
Deal found 14/10C$ 871

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 October 2025.

Round-trip from

C$ 462

One-way from

C$ 237

Popular in

November

Cheapest in

January

Average price

C$ 645
25/10-31/10
  • 25/10-31/10
  • 3 total stops
  • 47h 19m total
  • Calgary to St. Louis
Search Deals
13/12
  • 13/12
  • 2 total stops
  • 18h 46m total
  • Calgary to St. Louis
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 78 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).
Search Deals
Average for round-trip flights in October 2025
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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 October 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

Sat 25/10

12:05 p.m.-9:07 a.m.

2 stops20h 02m

Lambert-St Louis

Fri 31/10

4:52 p.m.-7:09 p.m.

1 stop27h 17m

C$ 462

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 28/11

6:35 a.m.-4:49 p.m.

1 stop9h 14m

Lambert-St Louis

Fri 5/12

6:26 p.m.-3:10 p.m.

2 stops21h 44m

C$ 593

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 25/10

1:30 p.m.-8:46 p.m.

1 stop6h 16m

Lambert-St Louis

Fri 31/10

5:24 p.m.-11:35 a.m.

1 stop19h 11m

C$ 594

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 25/10

6:45 a.m.-6:02 p.m.

2 stops10h 17m

Lambert-St Louis

Fri 31/10

10:30 a.m.-8:47 p.m.

2 stops11h 17m

C$ 610

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 28/11

9:45 p.m.-9:41 a.m.

2 stops10h 56m

Lambert-St Louis

Fri 5/12

6:00 a.m.-5:50 p.m.

2 stops12h 50m

C$ 697

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 24/10

1:10 a.m.-3:44 p.m.

2 stops13h 34m

Lambert-St Louis

Fri 31/10

6:30 a.m.-11:35 a.m.

1 stop6h 05m

C$ 709

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 27/11

12:15 a.m.-6:35 p.m.

2 stops17h 20m

Lambert-St Louis

Fri 5/12

5:12 p.m.-3:10 p.m.

2 stops22h 58m

C$ 871

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 13/12

9:45 p.m.-5:31 p.m.

2 stops18h 46m

C$ 237

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 28/11

7:50 a.m.-11:54 p.m.

2 stops15h 04m

C$ 340

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 13/12

3:30 p.m.-3:40 p.m.

3 stops23h 10m

C$ 369

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/10

Showing 1-10 of 15 results
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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$ 343). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 641). 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 October 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.

How much does it cost to fly round-trip from Calgary to St. Louis?

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 October 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
8,976 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
8,976 reviews
United Airlines
7.4
Good
8,976 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
WestJet
7.2
Good
3,125 reviews
United Airlines
7.4
Good
8,976 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Air Canada
7.1
Good
10,297 reviews
United Airlines
7.4
Good
8,976 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

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?

    United Airlines and Delta can get you from Calgary to St. Louis in just under 6h 16m. Your travel time can differ by up to 4h 01m. 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$ 342. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 452 and C$ 579, 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$ 343). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 641). 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.
Calgary to Kansas City flights
Edmonton to St. Louis flights
Edmonton to Kansas City flights
Calgary to Columbia flights
Edmonton 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 14 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 342AverageC$ 580FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 452AverageC$ 688FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 579AverageC$ 684FlexibilityNo 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?

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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?

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