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

American Airlines can get you from St. Louis to Calgary in just under 19h 04m. Your travel time can differ by up to . The distance between St. Louis and Calgary is about 1427 mi.

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

Cheapflights users have booked flights from St. Louis to Calgary round-trip from $168. Other airlines that can offer you cheap pricing are Delta, from $168, and United Airlines, from $343. Users have found that Air Canada is 69% cheaper than the other options available to this destination.

What is the cheapest day to fly from St. Louis to Calgary?

Travelers seeking maximum savings on their St. Louis to Calgary flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Calgary ranges from 0.4 - 3.7 inches per month. June is typically the wettest month, when rainfall can reach 3.7 in. January is typically the driest time to visit Calgary when rainfall is around 0.4 in.

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 19.4 F).

What are the most popular airlines that fly from St. Louis to Calgary?

Before booking your flight from St. Louis to Calgary check out the most popular airlines for this route: American Airlines, Air Canada or Delta.

What is the cheapest time of day to fly from STL to YYC?

When flying from St. Louis to Calgary, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 21% versus a flight in the morning.

Most accurate provider : When it comes to deals on St. Louis-Calgary flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Calgary flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Calgary flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Calgary flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Calgary flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$136+ Flights from St. Louis to Calgary

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1. Tell us where you want to go

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2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Lambert-St Louis to Calgary are usually found in January or April, booked 31 days in advance, depart on a Tuesday or Saturday and return on a Friday

Cheap flight deals from St. Louis to Calgary

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$281 (American Airlines)
One-way from	$136 (Kiwi.com)
Popular in	September
Cheapest in	January
Average price	$503

Provider with most accurate pricing for Lambert-St Louis-Calgary flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Calgary flights.

Search Deals

From Lambert-St Louis to Calgary

Search Deals

One-way flight from Lambert-St Louis to Calgary

Search Deals

Highest demand for flights based on searches. 2% potential increase in price ($12 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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 October 2, 2025.

Fri 10/109:59 pmSTL - YYC

2 stops23h 01mMultiple Airlines

Mon 10/138:55 amYYC - STL

1 stop23h 12mMultiple Airlines

Deal found 9/30

$325

Tue 10/288:40 pmSTL - YYC

2 stops16h 04mMultiple Airlines

Sat 11/112:30 amYYC - STL

1 stop9h 42mMultiple Airlines

Deal found 9/30

$332

Thu 10/99:50 amSTL - YYC

2 stops11h 12mMultiple Airlines

Mon 10/138:55 amYYC - STL

1 stop23h 12mMultiple Airlines

Deal found 9/29

$337

Fri 10/109:59 pmSTL - YYC

1 stop14h 56mMultiple Airlines

Tue 10/147:35 pmYYC - STL

2 stops12h 32mMultiple Airlines

Deal found 9/29

$340

Fri 10/314:52 pmSTL - YYC

2 stops23h 16mMultiple Airlines

Thu 11/612:30 amYYC - STL

1 stop14h 31mMultiple Airlines

Deal found 10/1

$385

Thu 10/3011:07 amSTL - YYC

1 stop25h 37mMultiple Airlines

Thu 11/67:35 pmYYC - STL

1 stop14h 49mMultiple Airlines

Deal found 9/30

$410

Best flights from St. Louis to Calgary
Discover carefully curated flight deals from St. Louis to Calgary that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 2, 2025.

Wed 1/146:44 pmSTL - YYC

1 stop19h 04mAmerican Airlines

Sun 1/186:30 amYYC - STL

2 stops13h 40mAmerican Airlines

Deal found 10/1

$291

Fri 10/314:52 pmSTL - YYC

2 stops23h 16mMultiple Airlines

Thu 11/612:30 amYYC - STL

1 stop14h 31mMultiple Airlines

Deal found 10/1

$385

Wed 1/146:00 amSTL - YYC

2 stops16h 43mAmerican Airlines

Sat 1/241:40 pmYYC - STL

1 stop19h 42mAmerican Airlines

Deal found 9/29

$388

Thu 10/234:34 pmSTL - YYC

1 stop21h 00mAmerican Airlines

Fri 10/3112:54 pmYYC - STL

1 stop21h 57mAmerican Airlines

Deal found 10/2

$416

Fri 1/161:35 pmSTL - YYC

1 stop24h 13mAmerican Airlines

Mon 1/191:40 pmYYC - STL

1 stop19h 42mAmerican Airlines

Deal found 9/30

$438

Fri 11/145:17 amSTL - YYC

1 stop17h 30mAmerican Airlines

Mon 11/176:30 amYYC - STL

2 stops16h 26mAmerican Airlines

Deal found 9/30

$467

Last-minute flights from St. Louis to Calgary
Discover last-minute flight deals from St. Louis to Calgary. Data last updated October 2, 2025 and is based on user searches.

Thu 10/99:50 amSTL - YYC

2 stops11h 12mMultiple Airlines

Mon 10/138:55 amYYC - STL

1 stop23h 12mMultiple Airlines

Deal found 9/29

$337

Fri 10/109:59 pmSTL - YYC

2 stops23h 01mMultiple Airlines

Mon 10/138:55 amYYC - STL

1 stop23h 12mMultiple Airlines

Deal found 9/30

$325

Fri 10/109:59 pmSTL - YYC

1 stop14h 56mMultiple Airlines

Tue 10/147:35 pmYYC - STL

2 stops12h 32mMultiple Airlines

Deal found 9/29

$340

Tue 10/288:40 pmSTL - YYC

2 stops16h 04mMultiple Airlines

Sat 11/112:30 amYYC - STL

1 stop9h 42mMultiple Airlines

Deal found 9/30

$332

Thu 10/3011:07 amSTL - YYC

1 stop25h 37mMultiple Airlines

Thu 11/67:35 pmYYC - STL

1 stop14h 49mMultiple Airlines

Deal found 9/30

$410

Fri 10/314:52 pmSTL - YYC

2 stops23h 16mMultiple Airlines

Thu 11/612:30 amYYC - STL

1 stop14h 31mMultiple Airlines

Deal found 10/1

$385

One-way flights from St. Louis to Calgary
Search for one-way flight options from St. Louis to Calgary. Find affordable one-way fares based on user searches. Data last updated October 2, 2025.

Mon 11/172:42 pmSTL - YYC

3 stops24h 13mMultiple Airlines

Deal found 10/1

$136

Fri 12/266:05 amSTL - YYC

2 stops14h 10mWestJet

Deal found 10/1

$308

Tue 10/74:50 pmSTL - YYC

1 stop5h 58mUnited Airlines

Deal found 9/30

$329

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 1/14

6:44 pm-12:48 pm

1 stop19h 04m

Calgary

Sun 1/18

6:30 am-9:10 pm

2 stops13h 40m

$291

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 10/31

4:52 pm-3:08 pm

2 stops23h 16m

Calgary

Thu 11/6

12:30 am-4:01 pm

1 stop14h 31m

$385

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 1/14

6:00 am-9:43 pm

2 stops16h 43m

Calgary

Sat 1/24

1:40 pm-10:22 am

1 stop19h 42m

$388

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Thu 10/23

4:34 pm-12:34 pm

1 stop21h 00m

Calgary

Fri 10/31

12:54 pm-11:51 am

1 stop21h 57m

$416

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 1/16

1:35 pm-12:48 pm

1 stop24h 13m

Calgary

Mon 1/19

1:40 pm-10:22 am

1 stop19h 42m

$438

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 11/14

5:17 am-9:47 pm

1 stop17h 30m

Calgary

Mon 11/17

6:30 am-11:56 pm

2 stops16h 26m

$467

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 11/17

9:07 pm-11:05 pm

1 stop26h 58m

$162

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 12/26

6:05 am-7:15 pm

2 stops14h 10m

$308

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 10/7

4:50 pm-9:48 pm

1 stop5h 58m

$329

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/1

Compare providers for flights from St. Louis to Calgary

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Calgary in October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Calgary flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Calgary flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Calgary flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Calgary flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Calgary flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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?

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 31 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 $300). Flying from St. Louis to Calgary in February is currently the most expensive (average of $404). 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.

Reviews of airlines servicing Calgary

Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from St. Louis to Calgary by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,962 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,933 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

11,033 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

WestJet

7.2

Good

3,111 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air Canada

7.1

Good

10,224 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

How long is the flight from St. Louis to Calgary?
American Airlines can get you from St. Louis to Calgary in just under 19h 04m. Your travel time can differ by up to . The distance between St. Louis and Calgary is about 1427 mi.
What are the cheapest airlines flying from St. Louis to Calgary round-trip?
Cheapflights users have booked flights from St. Louis to Calgary round-trip from $168. Other airlines that can offer you cheap pricing are Delta, from $168, and United Airlines, from $343. Users have found that Air Canada is 69% cheaper than the other options available to this destination.
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 $300). Flying from St. Louis to Calgary in February is currently the most expensive (average of $404). 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

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Alternative routes for St. Louis to Calgary

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Springfield to Calgary flights

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Other flights to Calgary

Top 5 airlines flying from St. Louis to Calgary

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$168	Average$582	FlexibilityNo cancel fee	On-time67%
Delta	Cheapest$168	Average$442	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$343	Average$682	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$383	Average$545	FlexibilityNo cancel fee	On-time71%
WestJet	Cheapest$460	Average$638	FlexibilityNo cancel fee	On-time60%

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$136+ Cheap flights from St. Louis (STL) to Calgary (YYC)

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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Calgary with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Lambert-St Louis to Calgary are usually found in January or April, booked 31 days in advance, depart on a Tuesday or Saturday and return on a Friday

Cheap flight deals from St. Louis to Calgary

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Calgary

Cheapest flights from St. Louis to CalgaryExplore 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 October 2, 2025.

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 October 2, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from St. Louis to Calgary

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Calgary in October.

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.

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?

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

Reviews of airlines servicing Calgary

Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from St. Louis to Calgary by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

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

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

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

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

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

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

Traveling to a place near Calgary?

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Alternative routes for St. Louis to Calgary

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Top 5 airlines flying from St. Louis to Calgary

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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 October 2, 2025.