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

Air Canada, at $313, was found to be the cheapest airline from Calgary to St. Louis.Alternate airlines to your destination round-trip include American Airlines and Delta. Air Canada is currently priced 30% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Calgary to St. Louis one-way?

$204 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Delta and WestJet, with prices starting from $212 and $231, respectively.

What is the cheapest day to fly from Calgary to St. Louis?

Travelers seeking maximum savings on their Calgary to St. Louis flight should consider departing on Friday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from Calgary to St. Louis?

Flying to your destination on a Saturday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to St. Louis. Check prices with Cheapflights to find a great deal for your trip.

How far in advance should I book a flight from Calgary to St. Louis?

Travelers have found it’s best to book a flight 52 days in advance to save up to 58% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 52 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Calgary to St. Louis 1-2 weeks in advance for as low as $390, or $516 for flights within the next 24 hours.

What is the cheapest month to fly from Calgary to St. Louis?

January can be a great time to fly to St. Louis from Calgary with a flight ticket averaging about $450. Cheapflights users have found deals in the month of January for as cheap as $244. The most expensive prices can be found in the month of November.

Most accurate provider : When it comes to deals on Calgary-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Calgary-St. Louis flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

$163+ Flights from Calgary to St. Louis

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Calgary to Lambert-St Louis are usually found in January or October, booked 87 days in advance, depart on a Friday or Saturday and return on a Tuesday

Cheap flight deals from Calgary to St. Louis

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$313 (Air Canada)
One-way from	$163 (Kiwi.com)
Popular in	November
Cheapest in	January
Average price	$420

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. 4% potential increase in price ($21 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 April 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 April 4, 2025.

Thu 5/81:30 pmYYC - STL

1 stop6h 31mAir Canada

Sun 5/111:30 pmSTL - YYC

1 stop10h 36mAir Canada

Deal found 4/3

$313

Fri 5/1612:45 pmYYC - STL

1 stop19h 14mAmerican Airlines

Mon 5/265:19 amSTL - YYC

1 stop17h 31mAmerican Airlines

Deal found 4/4

$319

Wed 5/72:00 pmYYC - STL

2 stops8h 26mDelta

Mon 5/122:29 pmSTL - YYC

1 stop9h 32mDelta

Deal found 4/4

$347

Fri 6/136:29 amYYC - STL

1 stop13h 01mMultiple Airlines

Mon 6/234:23 pmSTL - YYC

1 stop8h 06mMultiple Airlines

Deal found 4/3

$348

Fri 6/136:45 amYYC - STL

1 stop26h 49mWestJet

Mon 6/236:30 amSTL - YYC

2 stops13h 10mWestJet

Deal found 4/3

$370

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 April 4, 2025.

Thu 5/81:30 pmYYC - STL

1 stop6h 31mAir Canada

Sun 5/111:30 pmSTL - YYC

1 stop10h 36mAir Canada

Deal found 4/3

$313

Fri 5/1612:45 pmYYC - STL

1 stop19h 14mAmerican Airlines

Mon 5/265:19 amSTL - YYC

1 stop17h 31mAmerican Airlines

Deal found 4/4

$319

Wed 5/72:00 pmYYC - STL

2 stops8h 26mDelta

Mon 5/122:29 pmSTL - YYC

1 stop9h 32mDelta

Deal found 4/4

$347

Fri 6/136:29 amYYC - STL

1 stop13h 01mMultiple Airlines

Mon 6/234:23 pmSTL - YYC

1 stop8h 06mMultiple Airlines

Deal found 4/3

$348

Fri 6/136:45 amYYC - STL

1 stop26h 49mWestJet

Mon 6/236:30 amSTL - YYC

2 stops13h 10mWestJet

Deal found 4/3

$370

Last-minute flights from Calgary to St. Louis
Discover last-minute flight deals from Calgary to St. Louis. Data last updated April 4, 2025 and is based on user searches.

Wed 5/72:00 pmYYC - STL

2 stops8h 26mDelta

Mon 5/122:29 pmSTL - YYC

1 stop9h 32mDelta

Deal found 4/4

$347

Thu 5/81:30 pmYYC - STL

1 stop6h 31mAir Canada

Sun 5/111:30 pmSTL - YYC

1 stop10h 36mAir Canada

Deal found 4/3

$313

Thu 5/812:15 pmYYC - STL

2 stops30h 55mMultiple Airlines

Sun 5/1112:15 pmSTL - YYC

2 stops33h 04mMultiple Airlines

Deal found 4/3

$365

Thu 5/1512:30 amYYC - STL

1 stop7h 30mWestJet

Mon 5/266:00 amSTL - YYC

1 stop15h 40mWestJet

Deal found 4/4

$387

Fri 5/1612:45 pmYYC - STL

1 stop19h 14mAmerican Airlines

Mon 5/265:19 amSTL - YYC

1 stop17h 31mAmerican Airlines

Deal found 4/4

$319

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 April 4, 2025.

Sun 5/188:55 amYYC - STL

1 stop23h 14mMultiple Airlines

Deal found 4/3

$163

Wed 5/712:45 amYYC - STL

1 stop10h 51mAir Canada

Deal found 4/4

$204

Sat 5/1712:30 amYYC - STL

1 stop7h 30mDelta

Deal found 4/3

$212

Wed 5/712:20 amYYC - STL

2 stops15h 15mWestJet

Deal found 4/4

$231

Sun 9/287:33 pmYYC - STL

1 stop27h 26mAlaska Airlines

Deal found 4/4

$272

Mon 9/293:49 pmYYC - STL

3 stops22h 32mUnited Airlines

Deal found 4/4

$454

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 5/8

1:30 pm-9:01 pm

1 stop6h 31m

Lambert-St Louis

Sun 5/11

1:30 pm-11:06 pm

1 stop10h 36m

$313

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 5/16

12:45 pm-8:59 am

1 stop19h 14m

Lambert-St Louis

Mon 5/26

5:19 am-9:50 pm

1 stop17h 31m

$319

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 5/7

2:00 pm-11:26 pm

2 stops8h 26m

Lambert-St Louis

Mon 5/12

2:29 pm-11:01 pm

1 stop9h 32m

$347

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 6/13

6:29 am-8:30 pm

1 stop13h 01m

Lambert-St Louis

Mon 6/23

4:23 pm-11:29 pm

1 stop8h 06m

$348

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 6/13

6:45 am-10:34 am

1 stop26h 49m

Lambert-St Louis

Mon 6/23

6:30 am-6:40 pm

2 stops13h 10m

$370

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 5/18

8:55 am-9:09 am

1 stop23h 14m

$163

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 5/7

12:45 am-12:36 pm

1 stop10h 51m

$204

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 5/17

12:30 am-9:00 am

1 stop7h 30m

$212

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 5/7

12:20 am-4:35 pm

2 stops15h 15m

$231

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 9/28

7:33 pm-11:59 pm

1 stop27h 26m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/3

Showing 1-10 of 11 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 April.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Calgary-St. Louis flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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

How far ahead should I book a flight from Calgary to St. Louis?

To ensure you get the cheapest price possible for a flight from Calgary to St. Louis, you should look to book at least 82 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Calgary to St. Louis (average of $311). Flying from Calgary to St. Louis in March is currently the most expensive (average of $356). 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?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Calgary to St. Louis as you normally would.

Rainfall in St. Louis by month

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.

Temperature in St. Louis 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 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).

Reviews of airlines servicing St. Louis

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,837 reviews

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,899 reviews

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,618 reviews

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

WestJet

7.2

Good

2,795 reviews

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

What are the cheapest airlines flying from Calgary to St. Louis round-trip?
Air Canada, at $313, was found to be the cheapest airline from Calgary to St. Louis.Alternate airlines to your destination round-trip include American Airlines and Delta. Air Canada is currently priced 30% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Calgary to St. Louis one-way?
$204 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Delta and WestJet, with prices starting from $212 and $231, 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, August is the cheapest month in which you can book a flight from Calgary to St. Louis (average of $311). Flying from Calgary to St. Louis in March is currently the most expensive (average of $356). 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

Fenton

Maryland Heights

Fairview Heights

Collinsville

Wentzville

Eureka

St. Peters

Festus

Glencoe

Alton

Farmington

Chesterfield

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Top 2 airlines flying from Calgary to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$295	Average$296	FlexibilityNo cancel fee	On-time67%
American Airlines	Cheapest$309	Average$468	FlexibilityNo cancel fee	On-time71%

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$163+ 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 5/18. 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

Cheapflights Tip: The best prices from Calgary to Lambert-St Louis are usually found in January or October, booked 87 days in advance, depart on a Friday or Saturday and return on a Tuesday

Cheap 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

Find 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 April 4, 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 April 4, 2025.

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 April.

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

How far ahead should I book a flight from Calgary to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Calgary to St. Louis. Price data was last updated on March 28, 2025.

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?

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 April 4, 2025.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Louis

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?

What are the cheapest airlines to fly from Calgary to St. Louis one-way?

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?

Traveling to a place near Calgary?

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Alternative routes for 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 April 4, 2025.