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Cheap flights from St. Louis to Calgary from C$ 261

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 20/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYC
4 May — 11 May1
1 adult

Cheapflights Tip: The best prices from Lambert-St Louis to Calgary are usually found in January or October, 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 29 April 2025.

Round-trip from

C$ 545

One-way from

C$ 261

Popular in

June

Cheapest in

January

Average price

C$ 718
5/6-12/6
  • 5/6-12/6
  • 3 total stops
  • 18h 06m total
  • St. Louis to Calgary
Search Deals
Air Canada
  • Air Canada
  • 20/9
  • 1 total stop
  • 9h 08m total
  • St. Louis to Calgary
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 29 April 2025.

Thu 5/69:50 a.m.STL - YYC
2 stops11h 17mMultiple Airlines
Thu 12/69:15 a.m.YYC - STL
1 stop6h 49mMultiple Airlines
Deal found 28/4C$ 545
Tue 27/51:30 p.m.STL - YYC
1 stop10h 36mAir Canada
Tue 3/68:30 a.m.YYC - STL
1 stop6h 00mAir Canada
Deal found 28/4C$ 547
Thu 5/66:00 a.m.STL - YYC
1 stop18h 29mAmerican Airlines
Thu 12/66:29 a.m.YYC - STL
1 stop16h 25mAmerican Airlines
Deal found 28/4C$ 553
Tue 27/510:45 a.m.STL - YYC
2 stops13h 16mDelta
Tue 3/62:00 p.m.YYC - STL
1 stop9h 33mDelta
Deal found 28/4C$ 567
Wed 4/66:00 a.m.STL - YYC
1 stop11h 48mWestJet
Sat 7/612:30 a.m.YYC - STL
1 stop11h 05mWestJet
Deal found 27/4C$ 618

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 29 April 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 5/6

9:50 a.m.-8:07 p.m.

2 stops11h 17m

Calgary

Thu 12/6

9:15 a.m.-5:04 p.m.

1 stop6h 49m

C$ 545

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 27/5

1:30 p.m.-11:06 p.m.

1 stop10h 36m

Calgary

Tue 3/6

8:30 a.m.-3:30 p.m.

1 stop6h 00m

C$ 547

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Thu 5/6

6:00 a.m.-11:29 p.m.

1 stop18h 29m

Calgary

Thu 12/6

6:29 a.m.-11:54 p.m.

1 stop16h 25m

C$ 553

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 27/5

10:45 a.m.-11:01 p.m.

2 stops13h 16m

Calgary

Tue 3/6

2:00 p.m.-12:33 a.m.

1 stop9h 33m

C$ 567

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 4/6

6:00 a.m.-4:48 p.m.

1 stop11h 48m

Calgary

Sat 7/6

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

1 stop11h 05m

C$ 618

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sat 20/9

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

1 stop9h 08m

C$ 261

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Thu 15/5

6:00 a.m.-12:53 p.m.

1 stop7h 53m

C$ 265

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 1/7

2:23 p.m.-11:00 p.m.

1 stop9h 37m

C$ 266

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 30/6

8:35 a.m.-11:29 p.m.

1 stop15h 54m

C$ 270

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Thu 15/5

9:50 a.m.-8:07 p.m.

2 stops11h 17m

C$ 277

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

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 25 April 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 29 April 2025.
Delta
8.0
Very good
7,929 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,823 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,240 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 Air Canada is currently your cheapest option to Calgary, with prices starting at C$ 547. Additional round-trip tickets that might be worth considering are offered by American Airlines and Delta, with the lowest prices starting at C$ 553 and C$ 567, respectively. These flights start at 30% 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$ 266 on United Airlines and Delta, 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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Why should you use Cheapflights to find cheap flight tickets from St. Louis to Calgary?

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

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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