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

A quick flight from Calgary to St. Louis can take about 9h 15m. Delta provides one of the quickest options available for as low as $389. There are 1427 mi between Calgary and St. Louis.

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.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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.

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.

$171+ Flights from Calgary to St. Louis

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

Airfare is below average for this route at the moment. Calgary to St. Louis flights typically cost between $468 and $470 in January. The cheapest round-trip price found within the last 3 days was $247 on Multiple Airlines (Jan 12-Jan 19).

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Cheap 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 December 14, 2025.

Mon 12/2212:15 pmYYC - STL

2 stops9h 01mWestJet

Fri 1/27:10 amSTL - YYC

2 stops16h 18mWestJet

Deal found 12/13

$612

Mon 12/225:35 amYYC - STL

1 stop8h 54mAir Canada

Fri 1/24:05 pmSTL - YYC

1 stop9h 09mAir Canada

Deal found 12/13

$641

Mon 12/226:30 amYYC - STL

1 stop7h 30mAmerican Airlines

Fri 1/26:41 amSTL - YYC

1 stop7h 10mAmerican Airlines

Deal found 12/13

$703

Best flights from Calgary to St. Louis
Discover carefully curated flight deals from Calgary to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 14, 2025.

Thu 1/810:00 amYYC - STL

2 stops25h 12mMultiple Airlines

Sun 1/119:46 pmSTL - YYC

1 stop15h 15mMultiple Airlines

Deal found 12/13

$330

Thu 1/226:30 amYYC - STL

1 stop9h 15mDelta

Mon 1/265:25 pmSTL - YYC

1 stop28h 29mDelta

Deal found 12/12

$389

Thu 1/222:13 pmYYC - STL

1 stop5h 45mUnited Airlines

Mon 1/266:30 amSTL - YYC

1 stop6h 05mUnited Airlines

Deal found 12/11

$436

Sat 2/712:30 amYYC - STL

1 stop29h 21mMultiple Airlines

Wed 2/114:51 pmSTL - YYC

2 stops19h 19mMultiple Airlines

Deal found 12/12

$343

Sun 2/81:25 pmYYC - STL

2 stops9h 00mDelta

Wed 2/116:40 amSTL - YYC

2 stops12h 10mDelta

Deal found 12/12

$473

Thu 1/17:35 pmYYC - STL

2 stops13h 10mMultiple Airlines

Sat 1/248:22 pmSTL - YYC

1 stop16h 22mMultiple Airlines

Deal found 12/13

$468

Mon 1/129:45 pmYYC - STL

2 stops10h 08mDelta

Mon 1/196:10 amSTL - YYC

2 stops8h 50mDelta

Deal found 12/12

$489

Last-minute flights from Calgary to St. Louis
Discover last-minute flight deals from Calgary to St. Louis. Data last updated December 14, 2025 and is based on user searches.

Thu 1/17:35 pmYYC - STL

2 stops13h 10mMultiple Airlines

Sat 1/248:22 pmSTL - YYC

1 stop16h 22mMultiple Airlines

Deal found 12/13

$468

Thu 1/810:00 amYYC - STL

2 stops25h 12mMultiple Airlines

Sun 1/119:46 pmSTL - YYC

1 stop15h 15mMultiple Airlines

Deal found 12/13

$330

Thu 1/87:00 amYYC - STL

2 stops12h 32mAmerican Airlines

Sun 1/116:00 amSTL - YYC

2 stops10h 32mAmerican Airlines

Deal found 12/13

$523

Mon 1/129:45 pmYYC - STL

2 stops32h 06mMultiple Airlines

Mon 1/198:32 pmSTL - YYC

1 stop23h 37mMultiple Airlines

Deal found 12/12

$247

Mon 1/126:15 amYYC - STL

1 stop6h 01mUnited Airlines

Mon 1/192:45 pmSTL - YYC

1 stop8h 08mUnited Airlines

Deal found 12/12

$439

Mon 1/129:45 pmYYC - STL

2 stops10h 08mDelta

Mon 1/196:10 amSTL - YYC

2 stops8h 50mDelta

Deal found 12/12

$489

Thu 1/226:30 amYYC - STL

1 stop9h 15mDelta

Mon 1/265:25 pmSTL - YYC

1 stop28h 29mDelta

Deal found 12/13

$389

Thu 1/222:13 pmYYC - STL

1 stop5h 45mUnited Airlines

Mon 1/266:30 amSTL - YYC

1 stop6h 05mUnited Airlines

Deal found 12/11

$436

Thu 1/225:35 amYYC - STL

2 stops11h 08mAir Canada

Mon 1/269:57 amSTL - YYC

2 stops12h 02mAir Canada

Deal found 12/11

$503

One-way flights from Calgary to St. Louis
Search for one-way flight options from Calgary to St. Louis. Find affordable one-way fares based on user searches. Data last updated December 14, 2025.

Sun 3/88:15 pmYYC - STL

2 stops16h 04mMultiple Airlines

Deal found 12/12

$171

Thu 2/57:15 amYYC - STL

2 stops36h 33mMultiple Airlines

Deal found 12/12

$175

Fri 1/27:55 amYYC - STL

2 stops25h 07mMultiple Airlines

Deal found 12/11

$285

Thu 1/17:35 pmYYC - STL

2 stops13h 10mMultiple Airlines

Deal found 12/13

$353

Find flight deals from Calgary to St. Louis

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$247 (Kiwi.com)
One-way from	$171 (Kiwi.com)
Popular in	November
Cheapest in	January
Average price	$469

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 December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 1/8

10:00 am-12:12 pm

2 stops25h 12m

Lambert-St Louis

Sun 1/11

9:46 pm-12:01 pm

1 stop15h 15m

$330

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 2/7

12:30 am-6:51 am

1 stop29h 21m

Lambert-St Louis

Wed 2/11

4:51 pm-11:10 am

2 stops19h 19m

$343

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 1/22

6:30 am-4:45 pm

1 stop9h 15m

Lambert-St Louis

Mon 1/26

5:25 pm-8:54 pm

1 stop28h 29m

$389

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 1/22

2:13 pm-8:58 pm

1 stop5h 45m

Lambert-St Louis

Mon 1/26

6:30 am-11:35 am

1 stop6h 05m

$436

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 1/1

7:35 pm-9:45 am

2 stops13h 10m

Lambert-St Louis

Sat 1/24

8:22 pm-11:44 am

1 stop16h 22m

$468

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 2/8

1:25 pm-11:25 pm

2 stops9h 00m

Lambert-St Louis

Wed 2/11

6:40 am-5:50 pm

2 stops12h 10m

$473

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 1/12

9:45 pm-8:53 am

2 stops10h 08m

Lambert-St Louis

Mon 1/19

6:10 am-2:00 pm

2 stops8h 50m

$489

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 2/5

7:15 am-8:48 pm

2 stops36h 33m

$175

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 3/8

4:20 pm-7:07 am

1 stop13h 47m

$212

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 1/2

7:55 am-10:02 am

2 stops25h 07m

$285

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Showing 1-10 of 12 results

Compare providers for flights from Calgary to St. Louis

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 December.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust 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 November is currently the most expensive (average of $463). 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?

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

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

9,094 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

United Airlines

7.4

Good

9,094 reviews

United Airlines

7.4

Good

9,094 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

American Airlines

7.2

Good

11,054 reviews

United Airlines

7.4

Good

9,094 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

Related info for your journey

How long is the flight from Calgary to St. Louis?
A quick flight from Calgary to St. Louis can take about 9h 15m. Delta provides one of the quickest options available for as low as $389. There are 1427 mi between Calgary and St. Louis.
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 November is currently the most expensive (average of $463). 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.

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Other flights to St. Louis

Top 2 airlines flying from Calgary to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$309	Average$516	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$422	Average$509	FlexibilityNo cancel fee	On-time69%

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$171+ 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 3/8. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Calgary to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Calgary to St. Louis

Cheapest flights from Calgary to St. LouisExplore 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 December 14, 2025.

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 December 14, 2025.

Find flight deals from Calgary to St. Louis

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Calgary to St. Louis that are best for you.

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 December.

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.

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?

What is the cheapest time of day to fly from YYC to STL?

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

Reviews of airlines servicing St. Louis

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.

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?

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

Can I find deals for flights from Calgary to St. Louis that include hotel bookings?

How can I find direct flights from Calgary to St. Louis?

Can I find deals for business class flights from Calgary to St. Louis?

What is the cheapest month to book a flight from Calgary to St. Louis?

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Top 2 airlines flying from Calgary to St. Louis

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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 December 14, 2025.