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St. Louis

$180+ 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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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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 July 29, 2025.

Round-trip from

$322
(Kiwi.com)

One-way from

$180
(American Airlines)

Popular in

November

Cheapest in

January

Average price

$433
From Calgary to Lambert-St Louis
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One-way flight from Calgary to Lambert-St Louis
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Highest demand for flights based on searches. 5% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Fri 9/268:55 amYYC - STL
1 stop23h 11mMultiple Airlines
Sun 9/2812:05 pmSTL - YYC
1 stop7h 19mMultiple Airlines
Deal found 7/29$322
This American Airlines deal was found by Cheapflights users on 7/28. 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 9/116:29 amYYC - STL
1 stop16h 19mAmerican Airlines
Thu 9/187:23 amSTL - YYC
1 stop16h 56mAmerican Airlines
Deal found 7/28$385
This Air Canada deal was found by Cheapflights users on 7/29. 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.
Thu 9/2512:20 amYYC - STL
1 stop13h 58mAir Canada
Sun 9/281:30 pmSTL - YYC
1 stop10h 46mAir Canada
Deal found 7/29$407
This Delta deal was found by Cheapflights users on 7/27. 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.
Sun 8/247:55 amYYC - STL
1 stop9h 21mDelta
Sun 8/3111:23 amSTL - YYC
2 stops8h 17mDelta
Deal found 7/27$456
This FlightHub deal was found by Cheapflights users on 7/29. 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 7/2912:30 amYYC - STL
1 stop8h 11mWestJet
Tue 8/195:11 pmSTL - YYC
1 stop19h 08mWestJet
Deal found 7/29$488

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 July 29, 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

Fri 9/26

8:55 am-9:06 am

1 stop23h 11m

Lambert-St Louis

Sun 9/28

12:05 pm-6:24 pm

1 stop7h 19m

$322

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 9/11

6:29 am-11:48 pm

1 stop16h 19m

Lambert-St Louis

Thu 9/18

7:23 am-11:19 pm

1 stop16h 56m

$385

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 9/25

12:20 am-3:18 pm

1 stop13h 58m

Lambert-St Louis

Sun 9/28

1:30 pm-11:16 pm

1 stop10h 46m

$407

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 8/24

7:55 am-6:16 pm

1 stop9h 21m

Lambert-St Louis

Sun 8/31

11:23 am-6:40 pm

2 stops8h 17m

$456

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 8/23

12:30 am-12:31 pm

1 stop11h 01m

Lambert-St Louis

Sun 8/31

6:00 am-4:25 pm

2 stops11h 25m

$508

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 9/17

6:29 am-8:32 pm

1 stop13h 03m

$180

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 8/13

12:30 am-1:34 pm

1 stop12h 04m

$194

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 8/22

9:40 am-7:45 pm

1 stop9h 05m

$213

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 8/22

7:55 am-11:14 pm

2 stops14h 19m

$214

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 9/29

6:15 am-2:39 pm

1 stop7h 24m

$230

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 12 results
1
2

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, 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 July 29, 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.

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 July 29, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and United 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
WestJet
7.2
Good
2,972 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave

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 $385, was found to be the cheapest airline from Calgary to St. Louis.Alternate airlines to your destination round-trip include Air Canada and Delta. American Airlines is currently priced 13% below the average price you’ll pay for this route.

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

    $180 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from $213 and $214, 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 St. Louis?

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

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Alternative routes for Calgary to St. Louis

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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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$309Average$516FlexibilityNo cancel feeOn-time71%

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