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St. Louis

$244+ 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 3/13. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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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 January 29, 2026.

This American Airlines deal was found by Cheapflights users on 1/28. 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.
Mon 5/181:35 pm
YYC
-
STL
1 stop20h 44m
American Airlines
Thu 5/287:15 am
STL
-
YYC
1 stop17h 27m
American Airlines
Deal found 1/28$348
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 2/277:35 pm
YYC
-
STL
1 stop21h 11m
Multiple Airlines
Wed 3/45:18 pm
STL
-
YYC
2 stops22h 51m
Multiple Airlines
Deal found 1/26$350
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 2/263:35 pm
YYC
-
STL
1 stop27h 32m
Multiple Airlines
Wed 3/45:18 pm
STL
-
YYC
2 stops22h 51m
Multiple Airlines
Deal found 1/26$375
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Wed 2/257:35 pm
YYC
-
STL
1 stop24h 51m
Multiple Airlines
Wed 3/45:18 pm
STL
-
YYC
2 stops22h 51m
Multiple Airlines
Deal found 1/26$378
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Tue 2/248:55 am
YYC
-
STL
1 stop20h 56m
Multiple Airlines
Wed 3/45:18 pm
STL
-
YYC
2 stops22h 51m
Multiple Airlines
Deal found 1/26$390
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Sun 2/227:35 pm
YYC
-
STL
1 stop23h 27m
Multiple Airlines
Wed 3/45:18 pm
STL
-
YYC
2 stops22h 51m
Multiple Airlines
Deal found 1/26$398
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/269:50 am
YYC
-
STL
2 stops20h 01m
Multiple Airlines
Sun 3/110:11 pm
STL
-
YYC
1 stop14h 51m
Multiple Airlines
Deal found 1/27$399
This American Airlines deal was found by Cheapflights users on 1/26. 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.
Wed 2/251:40 pm
YYC
-
STL
1 stop9h 08m
American Airlines
Wed 3/45:12 am
STL
-
YYC
1 stop7h 32m
American Airlines
Deal found 1/26$420
This Delta deal was found by Cheapflights users on 1/27. 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.
Thu 3/126:30 am
YYC
-
STL
1 stop6h 54m
Delta
Thu 3/192:22 pm
STL
-
YYC
1 stop9h 40m
Delta
Deal found 1/27$427
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Mon 2/237:55 am
YYC
-
STL
1 stop11h 07m
Multiple Airlines
Wed 3/45:18 pm
STL
-
YYC
2 stops22h 51m
Multiple Airlines
Deal found 1/26$428
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Sat 2/286:30 am
YYC
-
STL
1 stop7h 24m
Multiple Airlines
Wed 3/45:18 pm
STL
-
YYC
2 stops22h 51m
Multiple Airlines
Deal found 1/26$439

Find 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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$348
(American Airlines)

One-way from

$244
(Air Canada)

Popular in

November

Cheapest in

February

Average price

$528
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 ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 29, 2026.
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

Mon 5/18

1:35 pm-11:19 am

1 stop20h 44m

Lambert-St Louis

Thu 5/28

7:15 am-11:42 pm

1 stop17h 27m

$348

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 2/27

7:35 pm-5:46 pm

1 stop21h 11m

Lambert-St Louis

Wed 3/4

5:18 pm-3:09 pm

2 stops22h 51m

$350

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 2/25

7:35 pm-9:26 pm

1 stop24h 51m

Lambert-St Louis

Wed 3/4

5:18 pm-3:09 pm

2 stops22h 51m

$378

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 2/24

8:55 am-6:51 am

1 stop20h 56m

Lambert-St Louis

Wed 3/4

5:18 pm-3:09 pm

2 stops22h 51m

$390

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 2/26

9:50 am-6:51 am

2 stops20h 01m

Lambert-St Louis

Sun 3/1

10:11 pm-12:02 pm

1 stop14h 51m

$399

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 3/12

6:30 am-2:24 pm

1 stop6h 54m

Lambert-St Louis

Thu 3/19

12:28 pm-11:02 pm

2 stops11h 34m

$427

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 2/24

12:40 pm-12:25 am

1 stop10h 45m

Lambert-St Louis

Wed 3/4

2:22 pm-11:05 pm

1 stop9h 43m

$427

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 2/28

6:30 am-2:54 pm

1 stop7h 24m

Lambert-St Louis

Wed 3/4

2:22 pm-11:05 pm

1 stop9h 43m

$427

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 2/26

7:40 am-5:42 pm

1 stop9h 02m

Lambert-St Louis

Wed 3/4

2:22 pm-11:05 pm

1 stop9h 43m

$427

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 2/23

7:55 am-8:02 pm

1 stop11h 07m

Lambert-St Louis

Wed 3/4

5:18 pm-3:09 pm

2 stops22h 51m

$428

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 17 results
1
2
  • 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

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

Currently, May is the cheapest month in which you can book a flight from Calgary to St. Louis (average of $302). Flying from Calgary to St. Louis in December is currently the most expensive (average of $470). 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.

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

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 January 29, 2026.
See what other customers who have flown with 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.
United Airlines
7.4
Good
9,215 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,215 reviews
United Airlines
7.4
Good
9,215 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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 20h 44m. American Airlines provides one of the quickest options available for as low as $348. There are 1427 mi between Calgary and St. Louis.

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

    United Airlines, at $422, was found to be the cheapest airline from Calgary to St. Louis.. United Airlines is currently priced 11% below the average price you’ll pay for this route.

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

    $190 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on WestJet and United Airlines, with prices starting from $207 and $232, 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, May is the cheapest month in which you can book a flight from Calgary to St. Louis (average of $302). Flying from Calgary to St. Louis in December is currently the most expensive (average of $470). 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Calgary to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$422Average$509FlexibilityNo cancel feeOn-time69%

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