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St. Louis

$142+ Cheap flights from Calgary (YYC) to St. Louis (STL)

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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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 October 28, 2025.

This American Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/181:31 pmYYC - STL
1 stop9h 14mAmerican Airlines
Mon 12/225:16 pmSTL - YYC
1 stop20h 32mAmerican Airlines
Deal found 10/28$394
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/187:30 amYYC - STL
2 stops33h 43mMultiple Airlines
Mon 12/2210:10 pmSTL - YYC
1 stop14h 51mMultiple Airlines
Deal found 10/28$441
This FlightHub deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2312:15 pmYYC - STL
2 stops9h 01mWestJet
Sat 1/36:05 amSTL - YYC
2 stops11h 10mWestJet
Deal found 10/28$552
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2212:30 amYYC - STL
1 stop8h 10mMultiple Airlines
Sat 1/37:43 pmSTL - YYC
2 stops39h 58mMultiple Airlines
Deal found 10/28$573
This WestJet deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/187:45 amYYC - STL
2 stops14h 44mWestJet
Mon 12/227:06 pmSTL - YYC
2 stops25h 09mWestJet
Deal found 10/26$591
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1812:15 pmYYC - STL
2 stops10h 14mDelta
Mon 12/2211:59 amSTL - YYC
2 stops12h 16mDelta
Deal found 10/28$604

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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$394
(American Airlines)

One-way from

$142
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$459
Provider with most accurate pricing for Calgary-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Calgary-Lambert-St Louis flights.
Search Deals
From Calgary to Lambert-St Louis
Search Deals
One-way flight from Calgary to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 2,558,603 searches. Data last updated October 28, 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

Thu 12/18

1:31 pm-11:45 pm

1 stop9h 14m

Lambert-St Louis

Mon 12/22

5:16 pm-12:48 pm

1 stop20h 32m

$394

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/18

7:30 am-6:13 pm

2 stops33h 43m

Lambert-St Louis

Mon 12/22

10:10 pm-12:01 pm

1 stop14h 51m

$441

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 12/23

12:15 pm-10:16 pm

2 stops9h 01m

Lambert-St Louis

Sat 1/3

6:05 am-9:06 pm

1 stop16h 01m

$566

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 12/22

12:30 am-9:40 am

1 stop8h 10m

Lambert-St Louis

Sat 1/3

7:43 pm-10:41 am

2 stops39h 58m

$573

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/18

7:45 am-11:29 pm

2 stops14h 44m

Lambert-St Louis

Mon 12/22

7:06 pm-7:15 pm

2 stops25h 09m

$591

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/18

12:15 pm-11:29 pm

2 stops10h 14m

Lambert-St Louis

Mon 12/22

11:59 am-11:15 pm

2 stops12h 16m

$604

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/11

8:55 am-9:47 am

1 stop23h 52m

$142

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 12/24

9:45 pm-9:40 am

2 stops10h 55m

$162

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/18

1:31 pm-11:45 pm

1 stop9h 14m

$190

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 12/18

9:00 am-10:02 am

3 stops24h 02m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 13 results
1
2

Compare providers for flights from Calgary to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Calgary to St. Louis in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Calgary-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Calgary-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Calgary-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Calgary-St. Louis flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Calgary-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 $244). Flying from Calgary to St. Louis in June is currently the most expensive (average of $456). 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 October 28, 2025.

When flying from Calgary to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 34% versus a flight at noon.

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 October 28, 2025.
See what other customers who have flown with United Airlines and American Airlines from Calgary to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,001 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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
9,001 reviews
United Airlines
7.4
Good
9,001 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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
American Airlines
7.2
Good
11,032 reviews
United Airlines
7.4
Good
9,001 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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?

    A quick flight from Calgary to St. Louis can take about 9h 01m. American Airlines provides one of the quickest options available for as low as $566. There are 1427 mi between Calgary and St. Louis. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Calgary to St. Louis round-trip?

    American Airlines, at $309, was found to be the cheapest airline from Calgary to St. Louis. An alternate airline flying to your destination would be United Airlines. American Airlines is currently priced 32% below the average price you’ll pay for this route.

  • 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 $244). Flying from Calgary to St. Louis in June is currently the most expensive (average of $456). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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

Top 2 airlines flying from Calgary to St. Louis

Discover the top 2 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 2,558,603 searches. Data last updated October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$309Average$516FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$422Average$509FlexibilityNo cancel feeOn-time69%

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