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St. Louis

$166+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
May 12 — May 191
Tue 5/12
Tue 5/19
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 12, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/7. 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 4/287:00 am
YYC
-
STL
1 stop22h 50m
Multiple Airlines
Fri 5/18:23 pm
STL
-
YYC
1 stop15h 37m
Multiple Airlines
Deal found 4/7$344
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 5/127:00 am
YYC
-
STL
1 stop24h 55m
Multiple Airlines
Thu 5/146:55 pm
STL
-
YYC
2 stops20h 50m
Multiple Airlines
Deal found 4/8$351
This United Airlines deal was found by Cheapflights users on 4/7. 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 9/26:00 am
YYC
-
STL
1 stop13h 39m
United Airlines
Sun 9/65:32 pm
STL
-
YYC
1 stop6h 04m
United Airlines
Deal found 4/7$358
This American Airlines deal was found by Cheapflights users on 4/8. 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 9/226:45 am
YYC
-
STL
1 stop7h 00m
American Airlines
Mon 9/287:44 am
STL
-
YYC
1 stop16h 36m
American Airlines
Deal found 4/8$361
This Delta deal was found by Cheapflights users on 4/8. 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.
Tue 9/227:15 am
YYC
-
STL
2 stops14h 46m
Delta
Mon 9/282:15 pm
STL
-
YYC
1 stop9h 51m
Delta
Deal found 4/8$367
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 5/127:00 am
YYC
-
STL
1 stop9h 33m
Multiple Airlines
Fri 5/159:18 pm
STL
-
YYC
1 stop16h 02m
Multiple Airlines
Deal found 4/8$387

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 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$344
(Kiwi.com)

One-way from

$166
(Trip.com)

Popular in

November

Cheapest in

October

Average price

$473
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, 2% potential price rise
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 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 12, 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

Tue 4/28

7:00 am-6:50 am

1 stop22h 50m

Lambert-St Louis

Fri 5/1

8:23 pm-11:00 am

1 stop15h 37m

$344

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 9/2

6:00 am-8:39 pm

1 stop13h 39m

Lambert-St Louis

Sun 9/6

5:32 pm-10:36 pm

1 stop6h 04m

$358

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 9/22

6:45 am-2:45 pm

1 stop7h 00m

Lambert-St Louis

Mon 9/28

7:44 am-11:20 pm

1 stop16h 36m

$361

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 9/22

7:15 am-11:01 pm

2 stops14h 46m

Lambert-St Louis

Mon 9/28

2:15 pm-11:06 pm

1 stop9h 51m

$367

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 5/12

7:00 am-5:33 pm

1 stop9h 33m

Lambert-St Louis

Thu 5/14

6:55 pm-11:00 am

1 stop17h 05m

$400

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 9/2

7:15 am-6:00 pm

1 stop9h 45m

Lambert-St Louis

Sun 9/6

12:10 pm-7:40 pm

2 stops8h 30m

$444

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 5/12

11:05 am-11:21 pm

2 stops11h 16m

Lambert-St Louis

Fri 5/15

10:19 am-8:05 pm

1 stop10h 46m

$446

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 5/12

11:05 am-11:21 pm

2 stops11h 16m

Lambert-St Louis

Thu 5/14

11:25 am-7:40 pm

2 stops9h 15m

$446
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 6/25

8:30 am-3:46 pm

1 stop6h 16m

Lambert-St Louis

Mon 6/29

4:48 pm-9:48 pm

1 stop6h 00m

$448
Cheapest one-way
Quickest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 5/21

8:45 am-7:23 pm

1 stop9h 38m

$166

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/7

Showing 1-10 of 16 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 $288). Flying from Calgary to St. Louis in January is currently the most expensive (average of $532). 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 7h. United Airlines provides one of the quickest options available for as low as $361. There are 1427 mi between Calgary and St. Louis. This flight may include one or multiple stops.

  • 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 12% 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 United Airlines and WestJet, with prices starting from $232 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, May is the cheapest month in which you can book a flight from Calgary to St. Louis (average of $288). Flying from Calgary to St. Louis in January is currently the most expensive (average of $532). 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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