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Cheap flights from Calgary to St. Louis from C$ 278

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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — STL
13 Jul — 20 Jul1
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 13 June 2026.

Thu 24/912:20 a.m.
YYC
-
STL
1 stop8h 20m
Multiple Airlines
Mon 5/1010:35 a.m.
STL
-
YYC
1 stop12h 15m
Multiple Airlines
Deal found 13/6C$ 562
Wed 30/912:20 a.m.
YYC
-
STL
1 stop8h 20m
Multiple Airlines
Mon 5/1010:35 a.m.
STL
-
YYC
1 stop12h 15m
Multiple Airlines
Deal found 9/6C$ 571
Tue 25/89:25 a.m.
YYC
-
STL
1 stop8h 17m
Air Canada
Wed 26/82:40 p.m.
STL
-
YYC
1 stop12h 11m
Air Canada
Deal found 8/6C$ 572
Thu 23/77:45 p.m.
YYC
-
STL
1 stop17h 17m
Air Canada
Sun 26/78:55 a.m.
STL
-
YYC
1 stop17h 26m
Air Canada
Deal found 10/6C$ 585
Fri 25/98:00 p.m.
YYC
-
STL
2 stops12h 34m
WestJet
Mon 5/1010:00 a.m.
STL
-
YYC
1 stop26h 00m
WestJet
Deal found 13/6C$ 608
Wed 28/106:00 a.m.
YYC
-
STL
1 stop8h 30m
Air Canada
Thu 29/104:15 p.m.
STL
-
YYC
1 stop8h 09m
Air Canada
Deal found 11/6C$ 618
Fri 24/77:00 a.m.
YYC
-
STL
1 stop24h 57m
Multiple Airlines
Sun 26/76:34 p.m.
STL
-
YYC
1 stop17h 26m
Multiple Airlines
Deal found 11/6C$ 624
Fri 24/77:00 a.m.
YYC
-
STL
2 stops26h 28m
WestJet
Sun 26/76:21 a.m.
STL
-
YYC
2 stops14h 19m
WestJet
Deal found 9/6C$ 632
Wed 22/712:20 a.m.
YYC
-
STL
1 stop16h 17m
Multiple Airlines
Sun 26/76:34 p.m.
STL
-
YYC
2 stops21h 41m
Multiple Airlines
Deal found 9/6C$ 636
Wed 22/712:20 a.m.
YYC
-
STL
1 stop16h 33m
WestJet
Sun 26/76:21 a.m.
STL
-
YYC
1 stop11h 39m
WestJet
Deal found 9/6C$ 638
Tue 7/77:45 p.m.
YYC
-
STL
1 stop17h 17m
Air Canada
Tue 14/72:40 p.m.
STL
-
YYC
1 stop11h 41m
Air Canada
Deal found 8/6C$ 642

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 13 June 2026.

Round-trip from

C$ 562

One-way from

C$ 278

Popular in

June

Cheapest in

May

Average price

C$ 918
24/9-5/10
  • 24/9-5/10
  • 2 total stops
  • 20h 35m total
  • Calgary to St. Louis
Search Deals
6/8
  • 6/8
  • 1 total stop
  • 9h 37m 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$ 31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 13 June 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 30/9

12:20 a.m.-9:40 a.m.

1 stop8h 20m

Lambert-St Louis

Mon 5/10

10:35 a.m.-9:50 p.m.

1 stop12h 15m

C$ 571

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 25/8

9:25 a.m.-6:42 p.m.

1 stop8h 17m

Lambert-St Louis

Wed 26/8

8:55 a.m.-1:51 a.m.

1 stop17h 56m

C$ 573

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 23/7

7:45 p.m.-2:02 p.m.

1 stop17h 17m

Lambert-St Louis

Sun 26/7

8:55 a.m.-1:21 a.m.

1 stop17h 26m

C$ 585

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 25/9

8:00 p.m.-9:34 a.m.

2 stops12h 34m

Lambert-St Louis

Mon 5/10

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

1 stop26h 00m

C$ 608
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 28/10

6:00 a.m.-3:30 p.m.

1 stop8h 30m

Lambert-St Louis

Thu 29/10

4:15 p.m.-11:24 p.m.

1 stop8h 09m

C$ 618

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 24/7

7:00 a.m.-10:28 a.m.

2 stops26h 28m

Lambert-St Louis

Sun 26/7

6:21 a.m.-7:40 p.m.

2 stops14h 19m

C$ 632

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 22/7

12:20 a.m.-5:37 p.m.

1 stop16h 17m

Lambert-St Louis

Sun 26/7

6:34 p.m.-3:15 p.m.

2 stops21h 41m

C$ 636

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 23/7

8:20 a.m.-8:37 p.m.

2 stops11h 17m

Lambert-St Louis

Sun 26/7

6:21 a.m.-7:40 p.m.

2 stops14h 19m

C$ 642

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 7/7

9:00 p.m.-8:19 a.m.

2 stops10h 19m

Lambert-St Louis

Tue 14/7

11:18 a.m.-7:40 p.m.

2 stops9h 22m

C$ 645
Cheapest one-way

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 16/9

12:33 p.m.-12:34 a.m.

1 stop11h 01m

C$ 287

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 18 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$ 417). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 834). 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 13 June 2026.
Read reviews from past customers who have flown Delta,WestJet, andAir Canada 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
7.9
Good
8,405 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

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
7.9
Good
8,405 reviews
Delta
7.9
Good
8,405 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

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
3,360 reviews
Delta
7.9
Good
8,405 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

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 ,
Air Canada
7.1
Good
11,176 reviews
Delta
7.9
Good
8,405 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

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?

    Air Canada and WestJet can get you from Calgary to St. Louis in just under 8h 17m. Your travel time can differ by up to 4h 17m. Airlines will cover a distance of 2297 km. This flight may include one or multiple stops.

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

    Flying on Air Canada is currently your cheapest option to St. Louis, with prices starting at C$ 264. Additional round-trip tickets that might be worth considering are offered by Delta and WestJet, with the lowest prices starting at C$ 320 and C$ 674, respectively. Air Canada is priced at 61% 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$ 417). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 834). 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.
Calgary to Kansas City flights
Edmonton to Kansas City flights
Edmonton to St. Louis flights
Edmonton to Columbia flights
Calgary to Columbia flights

Top 3 airlines flying from Calgary to St. Louis

Discover the top 3 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 13 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 264AverageC$ 683FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 320AverageC$ 549FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 674AverageC$ 735FlexibilityNo 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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