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St. Louis

$185+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
May 30 — Jun 61
Sat 5/30
Sat 6/6
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 April 30, 2026.

This American Airlines deal was found by Cheapflights users on 4/26. 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 6/107:00 am
YYC
-
STL
1 stop16h 16m
American Airlines
Wed 6/179:08 am
STL
-
YYC
1 stop15h 34m
American Airlines
Deal found 4/26$350
This American Airlines deal was found by Cheapflights users on 4/25. 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.
Tue 9/226:30 am
YYC
-
STL
1 stop12h 33m
American Airlines
Thu 9/247:44 am
STL
-
YYC
1 stop16h 36m
American Airlines
Deal found 4/25$367
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/232:00 pm
YYC
-
STL
1 stop9h 36m
Delta
Sun 10/252:15 pm
STL
-
YYC
1 stop9h 58m
Delta
Deal found 4/28$368
This United Airlines deal was found by Cheapflights users on 4/25. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:27 pm
YYC
-
STL
1 stop6h 43m
United Airlines
Fri 5/229:06 am
STL
-
YYC
1 stop5h 47m
United Airlines
Deal found 4/25$375
This United Airlines deal was found by Cheapflights users on 4/24. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:30 am
YYC
-
STL
1 stop6h 08m
United Airlines
Sun 8/235:32 pm
STL
-
YYC
1 stop6h 04m
United Airlines
Deal found 4/24$380
This Delta deal was found by Cheapflights users on 4/27. 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.
Mon 5/117:45 am
YYC
-
STL
2 stops15h 14m
Delta
Wed 5/132:27 pm
STL
-
YYC
1 stop9h 30m
Delta
Deal found 4/27$381
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:00 pm
YYC
-
STL
2 stops19h 33m
Multiple Airlines
Fri 6/58:08 pm
STL
-
YYC
1 stop19h 37m
Multiple Airlines
Deal found 4/28$407
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 5/238:45 am
YYC
-
STL
2 stops31h 48m
Multiple Airlines
Sat 5/305:27 pm
STL
-
YYC
1 stop18h 33m
Multiple Airlines
Deal found 4/25$412
This Justfly.com deal was found by Cheapflights users on 4/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:00 am
YYC
-
STL
1 stop7h 58m
WestJet
Sun 10/256:30 am
STL
-
YYC
2 stops12h 50m
WestJet
Deal found 4/28$414
This Justfly.com deal was found by Cheapflights users on 4/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1910:15 am
YYC
-
STL
1 stop5h 31m
WestJet
Fri 6/2610:20 am
STL
-
YYC
1 stop10h 45m
WestJet
Deal found 4/28$419

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 April 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$350
(American Airlines)

One-way from

$185
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$476
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. 3% potential increase in price ($17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 30, 2026.
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

Cheapest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 6/10

7:00 am-12:16 am

1 stop16h 16m

Lambert-St Louis

Wed 6/17

9:08 am-11:42 pm

1 stop15h 34m

$350

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 9/22

6:30 am-8:03 pm

1 stop12h 33m

Lambert-St Louis

Thu 9/24

7:44 am-11:20 pm

1 stop16h 36m

$367

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 10/23

2:00 pm-12:36 am

1 stop9h 36m

Lambert-St Louis

Sun 10/25

2:15 pm-11:13 pm

1 stop9h 58m

$368
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 5/21

1:27 pm-9:10 pm

1 stop6h 43m

Lambert-St Louis

Fri 5/22

9:06 am-1:53 pm

1 stop5h 47m

$375

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 5/11

7:45 am-11:59 pm

2 stops15h 14m

Lambert-St Louis

Wed 5/13

2:27 pm-10:57 pm

1 stop9h 30m

$381

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 5/11

12:30 am-9:44 am

1 stop8h 14m

Lambert-St Louis

Fri 5/15

11:25 am-5:00 pm

1 stop6h 35m

$421

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 8/19

6:35 am-2:31 pm

1 stop6h 56m

Lambert-St Louis

Sun 8/23

2:15 pm-11:06 pm

1 stop9h 51m

$426

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 6/19

10:15 am-4:46 pm

1 stop5h 31m

Lambert-St Louis

Fri 6/26

10:20 am-8:50 pm

2 stops11h 30m

$438

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 8/24

12:30 am-10:41 am

1 stop9h 11m

Lambert-St Louis

Wed 8/26

12:10 pm-7:40 pm

2 stops8h 30m

$443
Cheapest one-way
Quickest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 9/19

2:00 pm-12:36 am

1 stop9h 36m

$216

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 17 resultsSorted by cheapest first
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, October is the cheapest month in which you can book a flight from Calgary to St. Louis (average of $385). Flying from Calgary to St. Louis in June is currently the most expensive (average of $595). 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?

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 6h 43m. American Airlines provides one of the quickest options available for as low as $375. There are 1427 mi between Calgary and St. Louis. This flight may include one or multiple stops.

  • 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 United Airlines and WestJet, with prices starting from $209 and $260, 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, October is the cheapest month in which you can book a flight from Calgary to St. Louis (average of $385). Flying from Calgary to St. Louis in June is currently the most expensive (average of $595). 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
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

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