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Cheap flights from Calgary to St. Louis from C$ 241

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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
9 Sep — 16 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Calgary to St. Louis

Enter your travel dates to find the best prices.

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 10 August 2026.

Wed 14/107:00 a.m. -
1 stop25h 40m
Sun 18/1010:35 a.m. -
1 stop25h 25m
Deal found 7/8C$ 438
Wed 14/107:00 a.m. -
1 stop25h 40m
Fri 23/1010:35 a.m. -
1 stop25h 25m
Deal found 9/8C$ 456
Sun 11/107:00 a.m. -
1 stop25h 40m
Mon 19/1010:35 a.m. -
1 stop25h 25m
Deal found 6/8C$ 457
Sun 11/1012:20 a.m. -
1 stop8h 20m
Mon 19/1010:35 a.m. -
1 stop25h 25m
Deal found 6/8C$ 458
Sun 11/107:00 a.m. -
1 stop25h 40m
Fri 16/1010:35 a.m. -
1 stop25h 25m
Deal found 6/8C$ 461
Sun 11/107:00 a.m. -
1 stop25h 40m
Sun 18/1010:35 a.m. -
1 stop25h 25m
Deal found 6/8C$ 463
Sun 11/1012:20 a.m. -
1 stop8h 20m
Sun 18/1010:35 a.m. -
1 stop25h 25m
Deal found 6/8C$ 464
Wed 14/107:00 a.m. -
1 stop25h 40m
Wed 28/1010:35 a.m. -
1 stop9h 39m
Deal found 9/8C$ 465
Tue 6/1012:20 a.m. -
1 stop11h 50m
Mon 26/1010:35 a.m. -
1 stop26h 09m
Deal found 9/8C$ 468
Sun 11/1012:20 a.m. -
1 stop8h 20m
Sat 17/1010:35 a.m. -
1 stop25h 25m
Deal found 6/8C$ 478
Tue 6/1012:20 a.m. -
1 stop11h 50m
Mon 19/1010:35 a.m. -
1 stop25h 25m
Deal found 6/8C$ 479
Mon 12/1012:20 a.m. -
1 stop8h 20m
Thu 15/1010:35 a.m. -
1 stop25h 25m
Deal found 6/8C$ 481

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 10 August 2026.

Round-trip from

C$ 438

One-way from

C$ 241

Popular in

June

Cheapest in

May

Average price

C$ 697
14/10-18/10
  • 14/10-18/10
  • 2 total stops
  • 51h 05m total
  • Calgary to St. Louis
Search Deals
14/10
  • 14/10
  • 1 total stop
  • 25h 40m total
  • Calgary to St. Louis
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 629,999 searches. Data last updated 10 August 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 Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Wed 14/10

7:00 a.m.-9:40 a.m.

1 stop25h 40m

Lambert-St Louis

Fri 23/10

10:35 a.m.-11:00 a.m.

1 stop25h 25m

C$ 456

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Tue 6/10

12:20 a.m.-1:10 p.m.

1 stop11h 50m

Lambert-St Louis

Mon 26/10

10:35 a.m.-11:44 a.m.

1 stop26h 09m

C$ 468
Quickest round-trip

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Mon 21/9

10:15 a.m.-11:16 p.m.

1 stop12h 01m

Lambert-St Louis

Wed 23/9

11:21 a.m.-5:00 p.m.

1 stop6h 39m

C$ 492

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Fri 25/9

12:20 a.m.-4:32 p.m.

1 stop15h 12m

Lambert-St Louis

Tue 29/9

1:55 p.m.-8:15 p.m.

1 stop7h 20m

C$ 493

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Tue 6/10

12:20 a.m.-1:10 p.m.

1 stop11h 50m

Lambert-St Louis

Sat 24/10

10:35 a.m.-11:44 a.m.

1 stop26h 09m

C$ 496

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Fri 4/9

10:15 a.m.-11:26 p.m.

1 stop12h 11m

Lambert-St Louis

Fri 11/9

6:00 a.m.-5:10 p.m.

1 stop12h 10m

C$ 498

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Wed 2/9

12:20 a.m.-9:20 a.m.

1 stop8h 00m

Lambert-St Louis

Thu 10/9

6:15 a.m.-8:42 p.m.

1 stop15h 27m

C$ 498

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Wed 7/10

9:00 p.m.-9:09 a.m.

2 stops11h 09m

Lambert-St Louis

Sat 24/10

6:00 a.m.-5:10 p.m.

1 stop12h 10m

C$ 511

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Wed 7/10

8:00 p.m.-9:09 a.m.

2 stops12h 09m

Lambert-St Louis

Mon 26/10

5:35 p.m.-11:44 a.m.

1 stop19h 09m

C$ 511

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Tue 27/10

12:33 p.m.-12:44 a.m.

1 stop11h 11m

Lambert-St Louis

Fri 30/10

12:28 p.m.-8:40 p.m.

1 stop9h 12m

C$ 514

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 17 resultsSorted by cheapest first
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, May is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 446). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 967). 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 C$ 694 and C$ 704 in October.
The cheapest round-trip price found within the last 5 days was C$ 438 on Multiple Airlines (14 Oct-18 Oct).

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 10 August 2026.
Read reviews from past customers who have flown Delta and WestJet from Calgary to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,501 reviews
Check prices

Entertainment

7.8

Food

7.2

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Delta
7.8
Good
8,501 reviews
Delta
7.8
Good
8,501 reviews
Check prices

Entertainment

7.8

Food

7.2

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
WestJet
7.2
Good
3,430 reviews
Delta
7.8
Good
8,501 reviews
Check prices

Entertainment

7.8

Food

7.2

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,

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?

    WestJet can get you from Calgary to St. Louis in just under 12h 01m. Your travel time can differ by up to . Airlines will cover a distance of 2297 km.

  • What are the cheapest airlines flying from Calgary to St. Louis round-trip?

    Flying on Delta is currently your cheapest option to St. Louis, with prices starting at C$ 348. Another option worth looking into is WestJet, starting at C$ 570 round trip. Delta is priced at 51% lower than the current average price of a flight leaving 3 months from now.

  • 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 C$ 446). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 967). 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

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Chesterfield

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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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Calgary to Kansas City flights
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Edmonton to Columbia flights

Top 2 airlines flying from Calgary to St. Louis

Discover the top 2 airlines 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 629,999 searches. Data last updated 10 August 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 348AverageC$ 547FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 570AverageC$ 704FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Calgary to St. Louis?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Calgary to St. Louis. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Calgary to St. Louis?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Calgary to St. Louis for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Calgary to St. Louis with no change fees?

Need flexible booking options for your flight to St. Louis from Calgary? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Calgary to St. Louis become cheaper?

Of course! You can now track prices for flights from Calgary to St. Louis and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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