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Cheap flights from St. Louis to Calgary from C$ 266

STL — YYC
7 Oct — 14 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St. Louis to Calgary

Enter your travel dates to find the best prices.

Cheapest flights from St. Louis to Calgary

Fri 25/92:29 p.m. -
1 stop8h 21m
Tue 29/99:00 p.m. -
2 stops15h 10m
Deal found 4/9C$ 403
Wed 21/106:35 p.m. -
1 stop17h 25m
Tue 27/1012:25 a.m. -
1 stop16h 15m
Deal found 6/9C$ 448
Mon 5/102:29 p.m. -
1 stop21h 31m
Tue 13/109:00 p.m. -
2 stops19h 40m
Deal found 2/9C$ 495
Fri 25/92:29 p.m. -
1 stop8h 21m
Mon 28/99:55 p.m. -
2 stops38h 15m
Deal found 2/9C$ 545
Fri 25/911:01 a.m. -
1 stop13h 28m
Sat 3/101:51 p.m. -
1 stop9h 36m
Deal found 3/9C$ 577
Fri 25/92:29 p.m. -
1 stop27h 41m
Wed 30/97:25 p.m. -
2 stops38h 52m
Deal found 5/9C$ 609
Thu 1/102:10 p.m. -
2 stops9h 05m
Tue 6/107:00 a.m. -
1 stop29h 10m
Deal found 5/9C$ 617
Sun 18/107:29 a.m. -
1 stop6h 22m
Sun 25/101:51 p.m. -
1 stop20h 00m
Deal found 3/9C$ 620

Find flight deals from St. Louis to Calgary

Round-trip from

C$ 403

One-way from

C$ 266

Popular in

February

Cheapest in

November

Average price

C$ 935
25/9-29/9
  • 25/9-29/9
  • 3 total stops
  • 23h 31m total
  • St. Louis to Calgary
Search Deals
16/9-31/12
  • 16/9-31/12
  • 2 total stops
  • 9h 15m total
  • St. Louis to Calgary
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 103 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from St. Louis to Calgary that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisCalgary

STL Lambert-St Louis - YYC Calgary

STLYYC

Lambert-St Louis

Tue 6/10

5:40 a.m.-11:59 a.m.

1 stop7h 19m

Calgary

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 295

St. LouisCalgary

STL Lambert-St Louis - YYC Calgary

STLYYC

Lambert-St Louis

Tue 6/10

7:02 a.m.-8:35 p.m.

3 stops14h 33m

Calgary

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 307

St. LouisCalgary

STL Lambert-St Louis - YYC Calgary

STLYYC

Lambert-St Louis

Sun 13/9

2:00 p.m.-8:20 a.m.

3 stops43h 20m

Calgary

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 340
Quickest round-trip

St. LouisCalgary

STL Lambert-St Louis - YYC Calgary

STLYYC

Lambert-St Louis

Thu 17/9

8:46 a.m.-1:00 p.m.

1 stop5h 14m

Calgary

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 353

St. LouisCalgary

STL Lambert-St Louis - YYC Calgary

STLYYC

Lambert-St Louis

Mon 14/9

8:10 p.m.-12:10 p.m.

2 stops17h 00m

Calgary

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 358

St. LouisCalgary

STL Lambert-St Louis - YYC Calgary

STLYYC

Lambert-St Louis

Mon 14/9

5:18 p.m.-11:29 p.m.

1 stop7h 11m

Calgary

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 495

St. LouisCalgary

STL Lambert-St Louis - YYC Calgary

STLYYC

Lambert-St Louis

Sun 13/9

7:27 a.m.-12:56 p.m.

1 stop6h 29m

Calgary

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 495

St. LouisCalgary

STL Lambert-St Louis - YYC Calgary

STLYYC

Lambert-St Louis

Mon 5/10

2:29 p.m.-11:00 a.m.

1 stop21h 31m

Calgary

Tue 13/10

9:00 p.m.-5:40 p.m.

2 stops19h 40m

C$ 495

St. LouisCalgary

STL Lambert-St Louis - YYC Calgary

STLYYC

Lambert-St Louis

Sun 13/9

6:15 a.m.-5:00 p.m.

2 stops11h 45m

Calgary

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 519

St. LouisCalgary

STL Lambert-St Louis - YYC Calgary

STLYYC

Lambert-St Louis

Mon 14/9

2:30 p.m.-4:10 p.m.

2 stops26h 40m

Calgary

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 548

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 17 resultsSorted by cheapest first
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Best time to book a flight from St. Louis to Calgary

Have a flexible travel schedule? Discover the best time to fly to Calgary from St. Louis with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Calgary

How far ahead should I book a flight from St. Louis to Calgary?

The price you pay for your flight from St. Louis to Calgary may vary depending on when you book. For the best chance of a lower fare, look to book 86 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to Calgary?

Currently, November is the cheapest month in which you can book a flight from St. Louis to Calgary (average of C$ 668). Flying from St. Louis to Calgary in February is currently the most expensive (average of C$ 1,253). 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 St. Louis to Calgary?

Airfare is below average for this route at the moment.

St. Louis to Calgary flights typically cost between C$ 797 and C$ 1,114 in September.
The cheapest round-trip price found within the last 5 days was C$ 403 on Multiple Airlines (25 Sep-29 Sep).

Related info for your journey

  • How long is the flight from St. Louis to Calgary?

    A quick flight from St. Louis to Calgary can take about 7h 45m. Delta provides one of the quickest options available for as low as C$ 674. There are 2297 km between St. Louis and Calgary.

  • Can I find deals for flights from St. Louis to Calgary that include hotel bookings?

    Yes. In addition to deals on St. Louis to Calgary flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Calgary?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Calgary.

  • Can I find deals for business class flights from St. Louis to Calgary?

    Yes. Cheapflights offers flight deals from St. Louis to Calgary 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 St. Louis to Calgary?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Calgary (average of C$ 668). Flying from St. Louis to Calgary in February is currently the most expensive (average of C$ 1,253). 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 Calgary?

Book flights to Calgary if you plan to visit one of these locations
Canmore
Radium Hot Springs
Kananaskis
Drumheller
Airdrie

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for St. Louis to Calgary

Kansas City to Calgary flights
St. Louis to Edmonton flights

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

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