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St. Louis

$166+ 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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
Mar 10 — Mar 171
Mon 3/10
Mon 3/17
1 adult, Economy
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The best prices from Calgary to Lambert-St Louis are usually found in January or March, booked 82 days in advance, depart on a Friday or Saturday and return on a Tuesday

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 March 5, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$308
(American Airlines)

One-way from

$166
(Air Canada)

Popular in

June

Cheapest in

January

Average price

$341
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.
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From Calgary to Lambert-St Louis
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One-way flight from Calgary to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 5, 2025.

This American Airlines deal was found by Cheapflights users on 3/5. 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.
Mon 3/3112:45 pmYYC - STL
1 stop19h 03mAmerican Airlines
Mon 4/75:26 amSTL - YYC
1 stop7h 19mAmerican Airlines
Deal found 3/5$308
This Delta deal was found by Cheapflights users on 3/5. 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 4/37:40 amYYC - STL
1 stop9h 50mDelta
Thu 4/107:05 amSTL - YYC
2 stops17h 11mDelta
Deal found 3/5$310
This Air Canada deal was found by Cheapflights users on 3/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/106:15 amYYC - STL
1 stop13h 46mAir Canada
Sat 5/171:30 pmSTL - YYC
1 stop10h 36mAir Canada
Deal found 3/4$311
This United deal was found by Cheapflights users on 3/4. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/16:15 amYYC - STL
1 stop14h 35mMultiple Airlines
Wed 4/308:00 amSTL - YYC
2 stops16h 08mMultiple Airlines
Deal found 3/4$349
This FlightHub deal was found by Cheapflights users on 3/4. 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.
Sat 4/129:00 amYYC - STL
2 stops13h 04mWestJet
Mon 4/219:06 amSTL - YYC
2 stops14h 21mWestJet
Deal found 3/4$524
This deal was found by Cheapflights users on 3/5. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/126:15 amYYC - STL
1 stop5h 32mUnited Airlines
Mon 4/218:48 amSTL - YYC
1 stop6h 05mUnited Airlines
Deal found 3/5$564

Find flights from Calgary to St. Louis within your budget

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 March 5, 2025.

Fly from

Calgary

Fly to

St. Louis

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 3/31

12:45 pm-8:48 am

1 stop19h 03m

Lambert-St Louis

Mon 4/7

5:26 am-11:45 am

1 stop7h 19m

$308

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 4/3

7:40 am-6:30 pm

1 stop9h 50m

Lambert-St Louis

Thu 4/10

2:20 pm-11:16 pm

1 stop9h 56m

$310

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 5/10

6:15 am-9:01 pm

1 stop13h 46m

Lambert-St Louis

Sat 5/17

1:30 pm-11:06 pm

1 stop10h 36m

$311

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 4/1

6:15 am-9:50 pm

1 stop14h 35m

Lambert-St Louis

Wed 4/30

8:00 am-11:08 pm

2 stops16h 08m

$349

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 4/12

9:00 am-11:04 pm

2 stops13h 04m

Lambert-St Louis

Mon 4/21

9:06 am-10:27 pm

2 stops14h 21m

$524

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 4/12

6:15 am-12:47 pm

1 stop5h 32m

Lambert-St Louis

Mon 4/21

8:48 am-1:53 pm

1 stop6h 05m

$564

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 4/5

6:15 am-4:31 pm

1 stop9h 16m

$166

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 6/7

6:29 am-8:30 pm

1 stop13h 01m

$179

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 4/12

7:40 am-9:33 pm

2 stops12h 53m

$181

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 3/14

2:01 pm-9:34 pm

1 stop6h 33m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/5

Showing 1-10 of 13 results
1
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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 March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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.

Travel insights for flights from Calgary to St. Louis

Get recent, data-driven insights about flights from Calgary to St. Louis including ideal travel times, pricing trends, and more.

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 February 28, 2025.

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?

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 March 5, 2025.

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

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

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

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 March 5, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and United Airlines from Calgary to St. Louis. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,711 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

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
9,711 reviews
Alaska Airlines
8.0
Very good
9,711 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

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
8,044 reviews
Alaska Airlines
8.0
Very good
9,711 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

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
8,655 reviews
Alaska Airlines
8.0
Very good
9,711 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

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
9,711 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

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
2,788 reviews
Alaska Airlines
8.0
Very good
9,711 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

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

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?

    American Airlines, at $308, was found to be the cheapest airline from Calgary to St. Louis.Alternate airlines to your destination round-trip include Delta and Air Canada. American Airlines is currently priced 29% below the average price you’ll pay for this route.

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

    $166 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 American Airlines and Delta, with prices starting from $179 and $181, 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

Traveling to a place near Calgary?

Book flights to Calgary if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
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Chesterfield

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Top airline flying from Calgary to St. Louis

Discover the top airline 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 March 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$295Average$296FlexibilityNo cancel feeOn-time67%
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