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Cheap flights from St. Louis to Calgary from C$ 212

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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYC
17 Jun — 24 Jun1
1 adult

Cheapflights Tip: The best prices from Lambert-St Louis to Calgary are usually found in January or April, booked 27 days in advance, depart on a Thursday or Wednesday and return on a Sunday

Cheap flight deals from St. Louis to Calgary

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Calgary (YYC). 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 12 June 2025.

Round-trip from

C$ 387

One-way from

C$ 212

Popular in

September

Cheapest in

January

Average price

C$ 833
4/9-13/9
  • 4/9-13/9
  • 2 total stops
  • 32h 14m total
  • St. Louis to Calgary
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10/8
  • 10/8
  • 2 total stops
  • 34h 13m total
  • St. Louis to Calgary
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Highest demand for flights based on searches. 2% potential increase in price (C$ 31 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from St. Louis to Calgary

Cheapest flights from St. Louis to Calgary
Explore the most affordable flight options available from St. Louis to Calgary. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 June 2025.

Thu 4/98:44 a.m.STL - YYC
1 stop10h 40mMultiple Airlines
Sat 13/99:15 a.m.YYC - STL
1 stop21h 34mMultiple Airlines
Deal found 11/6C$ 387
Mon 25/88:50 a.m.STL - YYC
1 stop15h 39mAmerican Airlines
Thu 4/96:29 a.m.YYC - STL
1 stop12h 56mAmerican Airlines
Deal found 12/6C$ 469
Tue 12/811:25 a.m.STL - YYC
1 stop12h 28mUnited Airlines
Tue 19/85:05 p.m.YYC - STL
2 stops21h 39mUnited Airlines
Deal found 10/6C$ 585
Sun 31/81:30 p.m.STL - YYC
1 stop9h 00mAir Canada
Sun 31/81:10 a.m.YYC - STL
1 stop17h 35mAir Canada
Deal found 12/6C$ 591
Fri 12/912:10 p.m.STL - YYC
2 stops12h 02mDelta
Tue 16/97:15 a.m.YYC - STL
2 stops12h 20mDelta
Deal found 11/6C$ 651

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Calgary 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 12 June 2025.
Use the filters below to find and compare flights from St. Louis to Calgary that are best for you.

Fly from

St. Louis

Fly to

Calgary

Route

Depart

Return

Price

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Thu 4/9

8:44 a.m.-6:24 p.m.

1 stop10h 40m

Calgary

Sat 13/9

9:15 a.m.-7:49 a.m.

1 stop21h 34m

C$ 387

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 12/8

7:23 a.m.-11:29 p.m.

1 stop17h 06m

Calgary

Tue 19/8

6:29 a.m.-8:25 p.m.

1 stop12h 56m

C$ 470

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 12/8

11:25 a.m.-10:53 p.m.

1 stop12h 28m

Calgary

Tue 19/8

5:05 p.m.-3:44 p.m.

2 stops21h 39m

C$ 585

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Thu 4/9

1:30 p.m.-9:38 p.m.

1 stop9h 08m

Calgary

Sat 13/9

9:20 a.m.-7:38 p.m.

2 stops9h 18m

C$ 595

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 8/8

2:23 p.m.-10:57 p.m.

1 stop9h 34m

Calgary

Thu 14/8

7:55 a.m.-6:16 p.m.

1 stop9h 21m

C$ 606

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 30/6

6:40 a.m.-6:28 p.m.

1 stop12h 48m

Calgary

Mon 7/7

10:30 a.m.-10:33 a.m.

1 stop23h 03m

C$ 731

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sun 10/8

10:47 a.m.-8:00 p.m.

2 stops34h 13m

C$ 212

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sun 10/8

1:30 p.m.-11:13 p.m.

1 stop10h 43m

C$ 261

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 30/6

3:24 p.m.-11:50 p.m.

1 stop9h 26m

C$ 265

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 9/7

5:00 a.m.-11:38 a.m.

1 stop7h 38m

C$ 267

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

Showing 1-10 of 13 results
1
2

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
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 St. Louis to Calgary

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Calgary. Price data was last updated on 9 June 2025.

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 26 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, January is the cheapest month in which you can book a flight from St. Louis to Calgary (average of C$ 139). Flying from St. Louis to Calgary in July is currently the most expensive (average of C$ 263). 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.

Rainfall in Calgary by month

Plan your trip to Calgary by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Calgary ranges from 9.0 - 94.0 mm per month. June is typically the wettest month, when rainfall can reach 94.0 mm. January is typically the driest time to visit Calgary when rainfall is around 9.0 mm.

Temperature in Calgary by month

Plan your trip to Calgary by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Calgary, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -7.0 C).

Reviews of airlines servicing Calgary

Get insights into the airlines that provide service to Calgary. 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 Calgary. Reviews last updated 12 June 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and United Airlines from St. Louis to Calgary. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
WestJet
7.2
Good
2,868 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Calgary. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Flying on American Airlines is currently your cheapest option to Calgary, with prices starting at C$ 470. Additional round-trip tickets that might be worth considering are offered by United Airlines and Air Canada, with the lowest prices starting at C$ 585 and C$ 595, respectively. These flights start at 38% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Calgary one-way?

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as C$ 261. Users have also found prices from C$ 265 and C$ 267 on Alaska Airlines and United Airlines, respectively.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Calgary (average of C$ 139). Flying from St. Louis to Calgary in July is currently the most expensive (average of C$ 263). 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
Canmore
Airdrie
Radium Hot Springs
Drumheller
Kananaskis

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Alternative routes for St. Louis to Calgary

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