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Cheap flights from St. Louis to Calgary from C$ 243

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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYC
9 Mar — 16 Mar1
1 adult

The best prices from Lambert-St Louis to Calgary are usually found in January or October, booked 62 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 4 March 2025.

Round-trip from

C$ 478

One-way from

C$ 243

Popular in

July

Cheapest in

January

Average price

C$ 781
American Airlines
  • American Airlines
  • 14/5-19/5
  • 2 total stops
  • 37h 36m total
  • St. Louis to Calgary
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American Airlines
  • American Airlines
  • 21/4
  • 1 total stop
  • 7h 19m total
  • St. Louis to Calgary
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 139 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 4 March 2025.

Wed 14/57:30 p.m.STL - YYC
1 stop18h 05mAmerican Airlines
Mon 19/51:18 p.m.YYC - STL
1 stop19h 31mAmerican Airlines
Deal found 2/3C$ 478
Wed 14/512:15 p.m.STL - YYC
2 stops9h 04mMultiple Airlines
Mon 19/510:05 a.m.YYC - STL
1 stop13h 01mMultiple Airlines
Deal found 4/3C$ 520
Tue 18/38:20 a.m.STL - YYC
1 stop7h 01mAir Canada
Wed 26/36:15 a.m.YYC - STL
1 stop7h 51mAir Canada
Deal found 4/3C$ 553
Tue 18/311:19 a.m.STL - YYC
1 stop10h 23mDelta
Wed 26/37:40 a.m.YYC - STL
2 stops14h 46mDelta
Deal found 4/3C$ 573
Mon 10/36:30 a.m.STL - YYC
1 stop6h 09mUnited Airlines
Sat 15/32:01 p.m.YYC - STL
1 stop6h 33mUnited Airlines
Deal found 2/3C$ 690
Sat 16/87:32 p.m.STL - YYC
1 stop29h 18mAlaska Airlines
Thu 28/87:00 a.m.YYC - STL
1 stop15h 56mAlaska Airlines
Deal found 4/3C$ 725
Fri 18/712:10 p.m.STL - YYC
1 stop5h 38mWestJet
Tue 22/76:35 a.m.YYC - STL
1 stop6h 41mWestJet
Deal found 3/3C$ 905

Find flights from St. Louis to Calgary within your budget

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 4 March 2025.

Fly from

St. Louis

Fly to

Calgary

Route

Depart

Return

Price

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 14/5

7:30 p.m.-12:35 p.m.

1 stop18h 05m

Calgary

Mon 19/5

1:18 p.m.-9:49 a.m.

1 stop19h 31m

C$ 478

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 14/5

12:15 p.m.-8:19 p.m.

2 stops9h 04m

Calgary

Mon 19/5

10:05 a.m.-12:06 a.m.

1 stop13h 01m

C$ 520

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 18/3

8:20 a.m.-2:21 p.m.

1 stop7h 01m

Calgary

Wed 26/3

6:15 a.m.-3:06 p.m.

1 stop7h 51m

C$ 553

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 18/3

11:19 a.m.-8:42 p.m.

1 stop10h 23m

Calgary

Wed 26/3

7:40 a.m.-11:26 p.m.

2 stops14h 46m

C$ 573

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sat 16/8

7:32 p.m.-11:50 p.m.

1 stop29h 18m

Calgary

Thu 28/8

7:00 a.m.-11:56 p.m.

1 stop15h 56m

C$ 725

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 23/6

5:27 p.m.-6:21 p.m.

2 stops25h 54m

Calgary

Sat 28/6

7:30 p.m.-3:42 p.m.

2 stops19h 12m

C$ 853

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 18/7

12:10 p.m.-4:48 p.m.

1 stop5h 38m

Calgary

Tue 22/7

6:35 a.m.-2:16 p.m.

1 stop6h 41m

C$ 894

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 21/4

5:26 a.m.-11:45 a.m.

1 stop7h 19m

C$ 243

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 1/8

12:15 p.m.-8:19 p.m.

2 stops9h 04m

C$ 287

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 21/4

6:00 a.m.-5:40 p.m.

2 stops12h 40m

C$ 345

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

Showing 1-10 of 12 results
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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
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.

Travel insights for flights from St. Louis to Calgary

Get recent, data-driven insights about flights from St. Louis to Calgary including ideal travel times, pricing trends, and more.

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 28 February 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 62 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$ 138). 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 4 March 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
9,713 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines
8.0
Very good
9,713 reviews
Alaska Airlines
8.0
Very good
9,713 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta
8.0
Very good
8,061 reviews
Alaska Airlines
8.0
Very good
9,713 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines
7.4
Good
8,678 reviews
Alaska Airlines
8.0
Very good
9,713 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,713 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

WestJet
7.2
Good
2,788 reviews
Alaska Airlines
8.0
Very good
9,713 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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$ 478. Additional round-trip tickets that might be worth considering are offered by Air Canada and Delta, with the lowest prices starting at C$ 553 and C$ 573, respectively. These flights start at 41% 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 American Airlines. According to our data, you can fly for as low as C$ 243. Users have also found prices from C$ 345 and C$ 388 on Delta 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$ 138). 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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