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

Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of C$ 625.

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

Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 5h 08m.

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

Minneapolis (MSP) – chosen by Cheapflights users on 55% of one-stop itineraries from Calgary to St. Louis on Cheapflights.

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

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 0h 55m.

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

American Airlines and Delta can get you from Calgary to St. Louis in just under 7h 20m. Your travel time can differ by up to 3h 43m. Airlines will cover a distance of 2297 km. This flight may include one or multiple stops.

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

Flying on Delta is currently your cheapest option to St. Louis, with prices starting at C$ 349. Another option worth looking into is WestJet, starting at C$ 572 round trip. Delta is priced at 51% lower than the current average price of a flight leaving 3 months from now.

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Calgary to St. Louis as you normally would.

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$ 245+ Cheap Flights from Calgary to St. Louis

Cheap flight deals from Calgary to St. Louis

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 30 October 2026.

Thu 17/127:00 a.m. -

1 stop7h 20m

Mon 21/122:50 p.m. -

1 stop7h 57m

Deal found 26/10C$ 607

Thu 17/121:43 p.m. -

1 stop11h 03m

Mon 21/122:15 p.m. -

1 stop10h 00m

Deal found 27/10C$ 631

Thu 10/129:50 a.m. -

2 stops25h 07m

Thu 17/124:46 p.m. -

2 stops29h 29m

Deal found 26/10C$ 642

Thu 10/127:00 a.m. -

1 stop5h 53m

Thu 17/128:41 a.m. -

1 stop14h 12m

Deal found 26/10C$ 727

Find flight deals from Calgary to St. Louis

Round-trip from	C$ 607
One-way from	C$ 245
Popular in	June
Cheapest in	May
Average price	C$ 695

American Airlines
17/12-21/12
2 total stops
15h 17m total
Calgary to St. Louis

Search Deals

11/12-31/12
2 total stops
25h 07m total
Calgary to St. Louis

Search Deals

High demand for flights, 1% potential price rise

Search Deals

Cheapest flight prices on average. 3% potential price decrease (C$ 34 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Fri 11/12

9:50 a.m.-10:57 a.m.

2 stops25h 07m

Lambert-St Louis

Wed 31/12

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

Nonstop0h 00m

C$ 245

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sat 12/12

8:00 p.m.-10:57 a.m.

2 stops38h 57m

Lambert-St Louis

Wed 31/12

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

Nonstop0h 00m

C$ 277

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Thu 10/12

6:55 a.m.-10:57 a.m.

3 stops52h 02m

Lambert-St Louis

Wed 31/12

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

Nonstop0h 00m

C$ 294

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Thu 12/11

7:25 a.m.-5:14 p.m.

2 stops9h 49m

Lambert-St Louis

Wed 31/12

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

Nonstop0h 00m

C$ 340

Quickest round-trip

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sat 12/12

8:45 a.m.-2:44 p.m.

1 stop5h 59m

Lambert-St Louis

Wed 31/12

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

Nonstop0h 00m

C$ 340

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sun 22/11

8:10 a.m.-7:54 a.m.

3 stops47h 44m

Lambert-St Louis

Wed 31/12

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

Nonstop0h 00m

C$ 386

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Fri 20/11

7:25 a.m.-5:41 p.m.

1 stop10h 16m

Lambert-St Louis

Wed 31/12

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

Nonstop0h 00m

C$ 438

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sun 22/11

7:25 a.m.-5:41 p.m.

1 stop10h 16m

Lambert-St Louis

Wed 31/12

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

Nonstop0h 00m

C$ 438

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Thu 19/11

2:20 p.m.-11:22 p.m.

1 stop9h 02m

Lambert-St Louis

Wed 31/12

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

Nonstop0h 00m

C$ 438

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Thu 17/12

7:00 a.m.-2:20 p.m.

1 stop7h 20m

Lambert-St Louis

Mon 21/12

2:50 p.m.-10:47 p.m.

1 stop7h 57m

C$ 607

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

Showing 1-10 of 14 resultsSorted by cheapest first

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.

YYC-STL

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

Currently, May is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 448). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 971). 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 St. Louis

Read reviews from past customers who have flown Delta and WestJet 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.

Delta

7.8

Good

8,690 reviews

Check prices

Reviews

1 / 20

6.0

Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Delta

7.8

Good

8,690 reviews

Delta

7.8

Good

8,690 reviews

Check prices

Reviews

1 / 20

6.0

Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

WestJet

7.2

Good

3,442 reviews

Delta

7.8

Good

8,690 reviews

Check prices

Reviews

1 / 20

6.0

Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Related info for your journey

How long is the flight from Calgary to St. Louis?
American Airlines and Delta can get you from Calgary to St. Louis in just under 7h 20m. Your travel time can differ by up to 3h 43m. Airlines will cover a distance of 2297 km. This flight may include one or multiple stops.
What are the cheapest airlines flying from Calgary to St. Louis round-trip?
Flying on Delta is currently your cheapest option to St. Louis, with prices starting at C$ 349. Another option worth looking into is WestJet, starting at C$ 572 round trip. Delta is priced at 51% 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, May is the cheapest month in which you can book a flight from Calgary to St. Louis (average of C$ 448). Flying from Calgary to St. Louis in June is currently the most expensive (average of C$ 971). 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.

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Top 2 airlines flying from Calgary to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Delta	CheapestC$ 349	AverageC$ 607	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
WestJet	CheapestC$ 572	AverageC$ 698	FlexibilityNo cancel fee	On-time60%	Search WestJet flights

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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.

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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?

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Cheap flights from Calgary to St. Louis from C$ 245

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/12. 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

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 30 October 2026.

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 30 October 2026.

Best flights from Calgary to St. LouisDiscover 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 30 October 2026.

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 30 October 2026.

Last-minute flights from Calgary to St. LouisDiscover last-minute flight deals from Calgary to St. Louis. Data last updated 30 October 2026 and is based on user searches.

Discover last-minute flight deals from Calgary to St. Louis. Data last updated 30 October 2026 and is based on user searches.

One-way flights from Calgary to St. LouisSearch for one-way flight options from Calgary to St. Louis. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.

Search for one-way flight options from Calgary to St. Louis. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.

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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

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

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

Minneapolis (MSP) – chosen by Cheapflights users on 55% of one-stop itineraries from Calgary to St. Louis on Cheapflights.

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

Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of C$ 625.

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

Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 5h 08m.

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

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 0h 55m.

Reviews of airlines servicing St. Louis

Read reviews from past customers who have flown Delta and WestJet 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

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?

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Alternative routes for Calgary to St. Louis

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Complete your trip

Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to Missouri

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Search flights from Calgary to St. Louis by cabin class

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Calgary and St. Louis flights

Browse other Calgary and St. Louis flight options. Last updated on 30 October 2026.

Other flights from Calgary

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Top 2 airlines flying from Calgary to St. Louis

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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 30 October 2026.

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 30 October 2026.

Last-minute flights from Calgary to St. Louis
Discover last-minute flight deals from Calgary to St. Louis. Data last updated 30 October 2026 and is based on user searches.

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 30 October 2026.