HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$116+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Calgary to St. Louis with Cheapflights

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

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 11, 2025.

Round-trip from

$315
(Kiwi.com)

One-way from

$116
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$469
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 ($20 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 September 2025
Search Deals

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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 10/171:29 pmYYC - STL
1 stop17h 40mAmerican Airlines
Sun 10/194:34 pmSTL - YYC
1 stop21h 00mAmerican Airlines
Deal found 9/11$283
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 9/258:55 amYYC - STL
1 stop23h 11mMultiple Airlines
Sun 9/284:00 pmSTL - YYC
2 stops33h 44mMultiple Airlines
Deal found 9/11$315
This American Airlines deal was found by Cheapflights users on 9/9. 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 10/91:29 pmYYC - STL
1 stop17h 40mAmerican Airlines
Thu 10/165:11 amSTL - YYC
1 stop17h 43mAmerican Airlines
Deal found 9/9$330
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/99:00 amYYC - STL
2 stops25h 43mMultiple Airlines
Thu 10/166:33 amSTL - YYC
1 stop10h 58mMultiple Airlines
Deal found 9/9$348
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/1612:30 amYYC - STL
1 stop9h 07mMultiple Airlines
Sun 10/1910:57 amSTL - YYC
2 stops35h 29mMultiple Airlines
Deal found 9/11$362
This Air Canada deal was found by Cheapflights users on 9/11. 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.
Wed 9/241:10 amYYC - STL
1 stop17h 47mAir Canada
Sun 9/281:30 pmSTL - YYC
1 stop10h 46mAir Canada
Deal found 9/11$423
This Delta deal was found by Cheapflights users on 9/9. 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 10/911:00 amYYC - STL
2 stops12h 24mDelta
Thu 10/166:00 amSTL - YYC
2 stops12h 00mDelta
Deal found 9/9$453

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 September 11, 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 10/17

1:29 pm-8:09 am

1 stop17h 40m

Lambert-St Louis

Sun 10/19

4:34 pm-12:34 pm

1 stop21h 00m

$283

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 9/25

8:55 am-9:06 am

1 stop23h 11m

Lambert-St Louis

Sun 9/28

4:00 pm-12:44 am

2 stops33h 44m

$315

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 10/9

1:29 pm-8:09 am

1 stop17h 40m

Lambert-St Louis

Thu 10/16

5:11 am-9:54 pm

1 stop17h 43m

$330

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 10/8

12:30 am-10:37 am

1 stop9h 07m

Lambert-St Louis

Thu 10/16

10:57 am-8:02 pm

2 stops34h 05m

$340

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 10/16

12:30 am-10:37 am

1 stop9h 07m

Lambert-St Louis

Sun 10/19

10:57 am-9:26 pm

2 stops35h 29m

$362

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 9/24

1:10 am-7:57 pm

1 stop17h 47m

Lambert-St Louis

Sun 9/28

1:30 pm-11:16 pm

1 stop10h 46m

$423

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 10/9

11:00 am-12:24 am

2 stops12h 24m

Lambert-St Louis

Thu 10/16

6:00 am-5:00 pm

2 stops12h 00m

$453

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 10/6

7:35 pm-9:07 am

2 stops36h 32m

$153

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 10/26

1:29 pm-11:54 pm

1 stop9h 25m

$178

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 10/26

1:25 pm-9:07 am

2 stops18h 42m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 14 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 September 11, 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 September 11, 2025.
See what other customers who have flown with 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.
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Food

6.4

Overall

7.2

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Nordia,Sep 2025

KIN - MIA

We were to land in Miami sometime after 3pm but couldn’t due to bad weather, we flew around for 2 hrs until we had to land in Forth Myers to refuel, we had to sit another 2 hrs at Forth Myers until given the clearance to refuel, we were hungry, thirsty and frustrated at that point. All the had on the flight to offer was a small plastic glass of water and a pack of biscoff, I requested a cup of tea and was told none was there. We were basically at another airport and not one of the staff could consider that the passengers might be hungry or thirsty being on a plane for around 8 hrs, which you weren’t prepared for, at least find some hot water on board.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Food

6.4

Overall

7.2

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Nordia,Sep 2025

KIN - MIA

We were to land in Miami sometime after 3pm but couldn’t due to bad weather, we flew around for 2 hrs until we had to land in Forth Myers to refuel, we had to sit another 2 hrs at Forth Myers until given the clearance to refuel, we were hungry, thirsty and frustrated at that point. All the had on the flight to offer was a small plastic glass of water and a pack of biscoff, I requested a cup of tea and was told none was there. We were basically at another airport and not one of the staff could consider that the passengers might be hungry or thirsty being on a plane for around 8 hrs, which you weren’t prepared for, at least find some hot water on board.

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 17h 40m. American Airlines provides one of the quickest options available for as low as $283. There are 1427 mi between Calgary and St. Louis.

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

    American Airlines, at $309, was found to be the cheapest airline from Calgary to St. Louis.. American Airlines is currently priced 31% 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, 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
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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Calgary to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Calgary to Kansas City flights
Edmonton to St. Louis flights
Edmonton to Kansas City flights

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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$309Average$516FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.