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St. Louis

$173+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
Aug 28 — Sep 41
Fri 8/28
Fri 9/4
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 July 29, 2026.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:20 am
YYC
-
STL
1 stop8h 20m
Multiple Airlines
Sun 10/2510:35 am
STL
-
YYC
1 stop9h 39m
Multiple Airlines
Deal found 7/28$290
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 10/1112:20 am
YYC
-
STL
1 stop8h 20m
Multiple Airlines
Fri 10/1610:35 am
STL
-
YYC
1 stop25h 25m
Multiple Airlines
Deal found 7/26$313
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 am
YYC
-
STL
1 stop9h 22m
Multiple Airlines
Mon 8/246:17 pm
STL
-
YYC
1 stop28h 33m
Multiple Airlines
Deal found 7/27$318
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 9/612:20 am
YYC
-
STL
1 stop16h 02m
Multiple Airlines
Mon 9/142:29 pm
STL
-
YYC
1 stop8h 21m
Multiple Airlines
Deal found 7/26$319
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2712:20 am
YYC
-
STL
1 stop16h 02m
Multiple Airlines
Sun 8/306:17 pm
STL
-
YYC
1 stop28h 33m
Multiple Airlines
Deal found 7/27$320
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 am
YYC
-
STL
1 stop9h 22m
Multiple Airlines
Thu 8/276:17 pm
STL
-
YYC
2 stops21h 58m
Multiple Airlines
Deal found 7/27$329

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 July 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$290
(Kiwi.com)

One-way from

$173
(Trip.com)

Popular in

June

Cheapest in

May

Average price

$499
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
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 29, 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
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 10/21

12:20 am-9:40 am

1 stop8h 20m

Lambert-St Louis

Sun 10/25

10:35 am-7:14 pm

1 stop9h 39m

$290

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 9/6

12:20 am-5:22 pm

1 stop16h 02m

Lambert-St Louis

Mon 9/14

2:29 pm-9:50 pm

1 stop8h 21m

$319

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 8/27

12:20 am-5:22 pm

1 stop16h 02m

Lambert-St Louis

Sun 8/30

6:17 pm-9:50 pm

1 stop28h 33m

$320

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 10/12

9:00 pm-9:40 am

2 stops11h 40m

Lambert-St Louis

Fri 10/16

10:35 am-11:00 am

1 stop25h 25m

$325

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 9/7

11:50 pm-12:32 pm

2 stops11h 42m

Lambert-St Louis

Mon 9/14

4:59 pm-11:00 am

1 stop19h 01m

$379

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 8/21

8:20 am-8:42 pm

2 stops11h 22m

Lambert-St Louis

Mon 9/14

6:00 am-6:10 pm

2 stops13h 10m

$380

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 8/30

6:00 am-11:31 pm

1 stop16h 31m

Lambert-St Louis

Mon 8/31

4:40 pm-9:48 pm

1 stop6h 08m

$388
Cheapest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 10/12

12:20 am-9:40 am

1 stop8h 20m

$177

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 9/12

12:20 am-9:34 am

1 stop8h 14m

$214

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 9/8

7:00 am-12:14 am

1 stop16h 14m

$215

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 13 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, May is the cheapest month in which you can book a flight from Calgary to St. Louis (average of $320). Flying from Calgary to St. Louis in June is currently the most expensive (average of $694). 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?

Airfare is below average for this route at the moment.

Calgary to St. Louis flights typically cost between $429 and $505 in October.
The cheapest round-trip price found within the last 5 days was $290 on Multiple Airlines (Oct 21-Oct 25).

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.

  • 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 $320). Flying from Calgary to St. Louis in June is currently the most expensive (average of $694). 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
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington

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