What’s the top layover airport for flights from Calgary to St. Louis?

Denver (DEN) – chosen by Cheapflights users on 43% of one-stop itineraries from Calgary to St. Louis on Cheapflights.

What’s the fastest layover option from Calgary to St. Louis?

Flights via Minneapolis (MSP) have the shortest average one-way travel time for 1-stop routes: 5h 40m.

Which airport typically offers the quickest layover for flights from Calgary to St. Louis?

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 1h 31m.

What’s the cheapest layover airport for flights from Calgary to St. Louis?

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 427.

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

American Airlines can get you from Calgary to St. Louis in just under 17h 40m. Your travel time can differ by up to . Airlines will cover a distance of 2297 km.

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

Flying on Air Canada is currently your cheapest option to St. Louis, with prices starting at C$ 338. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 446 and C$ 571, respectively. Air Canada is priced at 46% lower than the current average price of a flight leaving 3 months from now.

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

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

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

If weather is an important factor for your trip to St. Louis, 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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

The most popular airlines flying from Calgary to St. Louis are Air Canada, United Airlines and WestJet. Something to consider prior to booking your flight.

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

It’s generally more expensive to depart on a Saturday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

The best pricing can be found in the month of January. Prices to St. Louis from Calgary average C$ 625. You can even find prices in January for less than C$ 625, as users have found deals to St. Louis from as low as C$ 338. The month of November appears to be one of the more expensive times to travel to St. Louis from Calgary. Flying in the targeted month can save you up to 23%.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Calgary to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 161+ Flights from Calgary to St. Louis

Cheap flight deals from Calgary to St. Louis

Round-trip from	C$ 392
One-way from	C$ 161
Popular in	November
Cheapest in	January
Average price	C$ 650

American Airlines
17/10-19/10
2 total stops
38h 40m total
Calgary to St. Louis

Search Deals

6/10
1 total stop
23h 12m total
Calgary to St. Louis

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (C$ 37 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Calgary to St. Louis

Cheapest flights from Calgary to St. Louis
Explore the most affordable flight options available from Calgary to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Fri 17/101:29 p.m.YYC - STL

1 stop17h 40mAmerican Airlines

Sun 19/104:34 p.m.STL - YYC

1 stop21h 00mAmerican Airlines

Deal found 11/9C$ 392

Thu 25/98:55 a.m.YYC - STL

1 stop23h 11mMultiple Airlines

Sun 28/94:00 p.m.STL - YYC

2 stops33h 44mMultiple Airlines

Deal found 11/9C$ 437

Thu 9/101:29 p.m.YYC - STL

1 stop17h 40mAmerican Airlines

Thu 16/105:11 a.m.STL - YYC

1 stop17h 43mAmerican Airlines

Deal found 9/9C$ 457

Thu 9/109:00 a.m.YYC - STL

2 stops25h 43mMultiple Airlines

Thu 16/106:33 a.m.STL - YYC

1 stop10h 58mMultiple Airlines

Deal found 9/9C$ 482

Thu 16/1012:30 a.m.YYC - STL

1 stop9h 07mMultiple Airlines

Sun 19/1010:57 a.m.STL - YYC

2 stops35h 29mMultiple Airlines

Deal found 11/9C$ 502

Wed 24/91:10 a.m.YYC - STL

1 stop17h 47mAir Canada

Sun 28/91:30 p.m.STL - YYC

1 stop10h 46mAir Canada

Deal found 11/9C$ 586

Thu 9/1011:00 a.m.YYC - STL

2 stops12h 24mDelta

Thu 16/106:00 a.m.STL - YYC

2 stops12h 00mDelta

Deal found 9/9C$ 628

Best flights from Calgary to St. Louis
Discover carefully curated flight deals from Calgary to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 11 September 2025.

Fri 17/101:29 p.m.YYC - STL

1 stop17h 40mAmerican Airlines

Sun 19/104:34 p.m.STL - YYC

1 stop21h 00mAmerican Airlines

Deal found 11/9C$ 392

Thu 25/98:55 a.m.YYC - STL

1 stop23h 11mMultiple Airlines

Sun 28/94:00 p.m.STL - YYC

2 stops33h 44mMultiple Airlines

Deal found 11/9C$ 437

Wed 24/91:10 a.m.YYC - STL

1 stop17h 47mAir Canada

Sun 28/91:30 p.m.STL - YYC

1 stop10h 46mAir Canada

Deal found 11/9C$ 586

Thu 9/1011:00 a.m.YYC - STL

2 stops12h 24mDelta

Thu 16/106:00 a.m.STL - YYC

2 stops12h 00mDelta

Deal found 9/9C$ 628

Thu 9/101:29 p.m.YYC - STL

1 stop17h 40mAmerican Airlines

Thu 16/105:11 a.m.STL - YYC

1 stop17h 43mAmerican Airlines

Deal found 9/9C$ 457

Wed 8/1012:30 a.m.YYC - STL

1 stop9h 07mMultiple Airlines

Thu 16/1010:57 a.m.STL - YYC

2 stops34h 05mMultiple Airlines

Deal found 9/9C$ 471

Thu 16/1012:30 a.m.YYC - STL

1 stop9h 07mMultiple Airlines

Sun 19/1010:57 a.m.STL - YYC

2 stops35h 29mMultiple Airlines

Deal found 11/9C$ 502

Last-minute flights from Calgary to St. Louis
Discover last-minute flight deals from Calgary to St. Louis. Data last updated 11 September 2025 and is based on user searches.

Wed 24/91:10 a.m.YYC - STL

1 stop17h 47mAir Canada

Sun 28/91:30 p.m.STL - YYC

1 stop10h 46mAir Canada

Deal found 11/9C$ 586

Thu 25/98:55 a.m.YYC - STL

1 stop23h 11mMultiple Airlines

Sun 28/94:00 p.m.STL - YYC

2 stops33h 44mMultiple Airlines

Deal found 11/9C$ 437

Thu 9/101:29 p.m.YYC - STL

1 stop17h 40mAmerican Airlines

Thu 16/105:11 a.m.STL - YYC

1 stop17h 43mAmerican Airlines

Deal found 9/9C$ 457

Thu 9/109:00 a.m.YYC - STL

2 stops25h 43mMultiple Airlines

Thu 16/106:33 a.m.STL - YYC

1 stop10h 58mMultiple Airlines

Deal found 9/9C$ 482

Thu 9/1011:00 a.m.YYC - STL

2 stops12h 24mDelta

Thu 16/106:00 a.m.STL - YYC

2 stops12h 00mDelta

Deal found 9/9C$ 628

Thu 16/1012:30 a.m.YYC - STL

1 stop9h 07mMultiple Airlines

Sun 19/1010:57 a.m.STL - YYC

2 stops35h 29mMultiple Airlines

Deal found 11/9C$ 502

Fri 17/101:29 p.m.YYC - STL

1 stop17h 40mAmerican Airlines

Sun 19/104:34 p.m.STL - YYC

1 stop21h 00mAmerican Airlines

Deal found 11/9C$ 392

One-way flights from Calgary to St. Louis
Search for one-way flight options from Calgary to St. Louis. Find affordable one-way fares based on user searches. Data last updated 11 September 2025.

Mon 6/108:55 a.m.YYC - STL

1 stop23h 12mMultiple Airlines

Deal found 9/9C$ 161

Sun 26/101:29 p.m.YYC - STL

1 stop9h 25mAmerican Airlines

Deal found 10/9C$ 247

Sun 26/101:25 p.m.YYC - STL

2 stops18h 42mMultiple Airlines

Deal found 10/9C$ 259

Fri 7/116:30 p.m.YYC - STL

3 stops38h 42mMultiple Airlines

Deal found 11/9C$ 356

Wed 17/911:35 p.m.YYC - STL

3 stops37h 18mMultiple Airlines

Deal found 10/9C$ 364

Fri 7/1112:32 p.m.YYC - STL

1 stop10h 52mDelta

Deal found 11/9C$ 378

Wed 17/96:40 a.m.YYC - STL

1 stop9h 05mWestJet

Deal found 10/9C$ 391

Fly from

Fly to

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 17/10

1:29 p.m.-8:09 a.m.

1 stop17h 40m

Lambert-St Louis

Sun 19/10

4:34 p.m.-12:34 p.m.

1 stop21h 00m

C$ 392

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 25/9

8:55 a.m.-9:06 a.m.

1 stop23h 11m

Lambert-St Louis

Sun 28/9

4:00 p.m.-12:44 a.m.

2 stops33h 44m

C$ 437

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 9/10

1:29 p.m.-8:09 a.m.

1 stop17h 40m

Lambert-St Louis

Thu 16/10

5:11 a.m.-9:54 p.m.

1 stop17h 43m

C$ 457

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 8/10

12:30 a.m.-10:37 a.m.

1 stop9h 07m

Lambert-St Louis

Thu 16/10

10:57 a.m.-8:02 p.m.

2 stops34h 05m

C$ 471

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 16/10

12:30 a.m.-10:37 a.m.

1 stop9h 07m

Lambert-St Louis

Sun 19/10

10:57 a.m.-9:26 p.m.

2 stops35h 29m

C$ 502

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 24/9

1:10 a.m.-7:57 p.m.

1 stop17h 47m

Lambert-St Louis

Sun 28/9

1:30 p.m.-11:16 p.m.

1 stop10h 46m

C$ 586

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 9/10

11:00 a.m.-12:24 a.m.

2 stops12h 24m

Lambert-St Louis

Thu 16/10

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

2 stops12h 00m

C$ 628

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 6/10

7:35 p.m.-9:07 a.m.

2 stops36h 32m

C$ 212

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 26/10

1:29 p.m.-11:54 p.m.

1 stop9h 25m

C$ 247

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 26/10

1:25 p.m.-9:07 a.m.

2 stops18h 42m

C$ 259

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 14 results

Best time to book a flight from Calgary to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Calgary 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 Calgary to St. Louis

Prices

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

Currently, January is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 365). Flying from Calgary to St. Louis in September is currently the most expensive (average of C$ 491). 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.

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

It’s typically best to fly out from Calgary to St. Louis in the afternoon. Doing so could potentially save you 32% on the flight price compared to flying in the evening, which is usually more expensive.

Reviews of airlines servicing St. Louis

Read reviews from past customers who have flown United Airlines,WestJet, andAir Canada from Calgary to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

United Airlines

7.4

Good

8,937 reviews

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

WestJet

7.2

Good

3,091 reviews

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Air Canada

7.1

Good

10,000 reviews

United Airlines

7.4

Good

8,937 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

How long is the flight from Calgary to St. Louis?
American Airlines can get you from Calgary to St. Louis in just under 17h 40m. Your travel time can differ by up to . Airlines will cover a distance of 2297 km.
What are the cheapest airlines flying from Calgary to St. Louis round-trip?
Flying on Air Canada is currently your cheapest option to St. Louis, with prices starting at C$ 338. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 446 and C$ 571, respectively. Air Canada is priced at 46% lower than the current average price of a flight leaving 3 months from now.
Can I find deals for flights from Calgary to St. Louis that include hotel bookings?
Yes. In addition to deals on Calgary to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Calgary to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Calgary to St. Louis.
Can I find deals for business class flights from Calgary to St. Louis?
Yes. Cheapflights offers flight deals from Calgary to St. Louis 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 Calgary to St. Louis?
Currently, January is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 365). Flying from Calgary to St. Louis in September is currently the most expensive (average of C$ 491). 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

Chesterfield

St. Peters

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Alternative routes for Calgary to St. Louis

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Complete your trip

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Midtown car rentals

Soulard car rentals

West End car rentals

Top 3 airlines flying from Calgary to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 338	AverageC$ 572	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 446	AverageC$ 656	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
WestJet	CheapestC$ 571	AverageC$ 691	FlexibilityNo cancel fee	On-time60%	Search WestJet flights

Fly with Cheapflights

How does Cheapflights help users find flights from Calgary to St. Louis?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Calgary to St. Louis. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Calgary to St. Louis?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Calgary to St. Louis for you. Better yet — we are completely free to use.

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

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

Can Cheapflights notify me if prices for flights from Calgary to St. Louis become cheaper?

Of course! You can now track prices for flights from Calgary to St. Louis and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from Calgary to St. Louis from C$ 161

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Calgary to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Calgary to St. Louis

Cheapest flights from Calgary to St. LouisExplore the most affordable flight options available from Calgary to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Explore the most affordable flight options available from Calgary to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Calgary to St. Louis

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

Cheapflights Insights

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

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

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

What’s the top layover airport for flights from Calgary to St. Louis?

What’s the fastest layover option from Calgary to St. Louis?

What’s the fastest layover option from Calgary to St. Louis?

Which airport typically offers the quickest layover for flights from Calgary to St. Louis?

Reviews of airlines servicing St. Louis

Read reviews from past customers who have flown United Airlines,WestJet, andAir Canada from Calgary to St. Louis. Users can see the overall rating for each airline as well as how each is rated 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 Calgary to St. Louis. 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 Calgary to St. Louis?

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

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

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

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

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

Travelling to a place near St. Louis?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Calgary to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Calgary to St. Louis

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How does Cheapflights help users find flights from Calgary to St. Louis?

Why should you use Cheapflights to find cheap flight tickets from Calgary to St. Louis?

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

Can Cheapflights notify me if prices for flights from Calgary to St. Louis become cheaper?

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Cheapest flights from Calgary to St. Louis
Explore the most affordable flight options available from Calgary to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.