Q: How much does it cost to fly round-trip from St. Louis to Calgary?

Airfare is below average for this route at the moment. St. Louis to Calgary flights typically cost between C$ 659 and C$ 890 in September. The cheapest round-trip price found within the last 3 days was C$ 451 on American Airlines (3 Sep-10 Sep).

Question 1

How much does it cost to fly round-trip from St. Louis to Calgary?

Accepted Answer

Airfare is below average for this route at the moment.St. Louis to Calgary flights typically cost between C$ 659 and C$ 890 in September.
The cheapest round-trip price found within the last 3 days was C$ 451 on American Airlines (3 Sep-10 Sep).

Question 2

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

Accepted Answer

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 1h 00m.

Question 3

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

Accepted Answer

Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 5h 48m.

Question 4

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

Accepted Answer

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of C$ 797.

Question 5

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

Accepted Answer

Denver (DEN) – chosen by Cheapflights users on 80% of one-stop itineraries from St. Louis to Calgary on Cheapflights.

Question 6

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

Accepted Answer

Flying on American Airlines is currently your cheapest option to Calgary, with prices starting at C$ 451. Additional round-trip tickets that might be worth considering are offered by Air Canada and Delta, with the lowest prices starting at C$ 555 and C$ 568, respectively. These flights start at 41% lower than the current average price 3 months from now.

Question 7

How far ahead should I book a flight from St. Louis to Calgary?

Accepted Answer

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.

Question 8

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

Accepted Answer

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.

Question 9

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

Accepted Answer

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

Question 10

E

Accepted Answer

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.

Question 11

E

Accepted Answer

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).

Question 12

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

Accepted Answer

Sunday flights are generally found to be more expensive for flights from St. Louis to Calgary. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Calgary.

Question 13

How far in advance should I book a flight from St. Louis to Calgary?

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 27 days in advance, which can save you up to 278% on flights from St. Louis to Calgary compared to booking the week you need them. Waiting 27 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 247. For sooner than that we have options available in the next 3 days from C$ 968.

Question 14

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

Accepted Answer

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, January can be a great choice for travel to Calgary. Flights to Calgary from St. Louis in January are about C$ 775 on average during January, but can be found for as low as C$ 218.

Question 15

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

Accepted Answer

It’s typically best to fly out from St. Louis to Calgary at noon. Doing so could potentially save you 39% on the flight price compared to flying in the afternoon, which is usually more expensive.

Question 16

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

Accepted Answer

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

Question 17

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

Accepted Answer

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.

Question 18

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

Accepted Answer

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.

Question 19

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

Accepted Answer

When you search for this flight from St. Louis to Calgary, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Question 20

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

Accepted Answer

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Calgary from St. Louis.

Question 21

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

Accepted Answer

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.

Question 22

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

Accepted Answer

Of course! You can now track prices for flights from St. Louis to Calgary 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.

Round-trip from	C$ 451
One-way from	C$ 156
Popular in	July
Cheapest in	January
Average price	C$ 887

Cheap flights from St. Louis to Calgary from C$ 156

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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Lambert-St Louis to Calgary are usually found in January or April, booked 26 days in advance, depart on a Thursday or Wednesday and return on a Sunday

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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 30 Juli 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 30 Juli 2025.

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

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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 July 2025.

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

How much does it cost to fly round-trip from St. Louis to Calgary?

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

Share of one-stop round-trip flights from St. Louis to Calgary chosen by Cheapflights users in the past 12 months, using the same layover each way.

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

Average round-trip fare for 1-stop flights from St. Louis to Calgary, chosen by Cheapflights users in the past 12 months, with the same layover each way.

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

Shortest average travel time for 1-stop one-way flights from St. Louis to Calgary, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

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

Average layover duration for 1-stop one-way flights from St. Louis to Calgary, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Calgary

See what other customers who have flown with Delta,United Airlines, andAmerican Airlines from St. Louis to Calgary have to say. You can also see how each airline compares 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.

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?

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

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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 30 Juli 2025.