What is the cheapest airline that flies from Lambert-St Louis to Calgary?

American Airlines, Air Canada, and WestJet are the most popular carriers operating from Lambert-St Louis to Calgary

What airlines fly to Calgary?

WestJet, United Airlines and American Airlines are the top three most popular airlines that fly to Calgary from St. Louis according to our data. WestJet is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Calgary. Keep in mind that there are 5 different airlines that fly to Calgary on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Calgary Airport?

Prices for flights from Lambert-St Louis Airport to Calgary Airport are updated daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Calgary Airport?

As of July 2025, there are 5 operators available to choose from for flights from Lambert-St Louis Airport to Calgary Airport.

How old do you have to be to fly from Lambert-St Louis Airport to Calgary Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Calgary Airport.

What documentation or ID do you need to fly to Calgary Airport?

The required travel and health documents for your Calgary Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Calgary Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$156 Cheap Flights from St. Louis to Calgary in 2025

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Find the cheapest flights from St. Louis to Calgary

Round-trip

One-way

Last minute

Cheap round-trip flights

7:52 pm - 2:45 pmSTL-YYC

19h 53m1 stop

8:55 am - 9:07 amYYC-STL

23h 12m1 stop

$298

Find Deal

jue., oct. 9 - lun., oct. 13

7:54 pm - 2:45 pmSTL-YYC

19h 51m1 stop

9:15 am - 1:30 pmYYC-STL

27h 15m1 stop

$321

Find Deal

mié., sep. 3 - mié., sep. 10

7:54 pm - 2:45 pmSTL-YYC

19h 51m1 stop

4:20 pm - 9:06 amYYC-STL

15h 46m1 stop

$334

Find Deal

lun., sep. 1 - dom., sep. 7

7:29 pm - 2:46 pmSTL-YYC

20h 17m1 stop

8:55 am - 9:11 amYYC-STL

23h 16m1 stop

$339

Find Deal

mié., ago. 13 - mié., ago. 20

7:54 pm - 2:46 pmSTL-YYC

19h 52m1 stop

8:55 am - 9:06 amYYC-STL

23h 11m1 stop

$346

Find Deal

sáb., ago. 30 - sáb., sep. 6

2:26 pm - 6:24 pmSTL-YYC

28h 58m1 stop

12:30 am - 3:04 pmYYC-STL

13h 34m1 stop

$349

Find Deal

jue., sep. 18 - dom., sep. 21

7:23 am - 11:19 pmSTL-YYC

16h 56m1 stop

6:29 am - 8:32 pmYYC-STL

13h 03m1 stop

$363American Airlines

Find Deal

mié., sep. 3 - mié., sep. 10

2:26 pm - 6:24 pmSTL-YYC

28h 58m1 stop

12:30 am - 3:04 pmYYC-STL

13h 34m1 stop

$364

Find Deal

jue., sep. 18 - dom., sep. 21

4:34 pm - 12:34 pmSTL-YYC

21h 00m1 stop

1:29 pm - 8:09 amYYC-STL

17h 40m1 stop

$366American Airlines

Find Deal

lun., oct. 20 - vie., oct. 24

7:23 am - 11:19 pmSTL-YYC

16h 56m1 stop

6:29 am - 11:48 pmYYC-STL

16h 19m1 stop

$370American Airlines

Find Deal

jue., sep. 18 - lun., sep. 22

American Airlines flights from St. Louis to Calgary

Our best American Airlines deals on St. Louis to Calgary flight tickets

American Airlines

Sep 3

STL7:23 amLambert-St Louis

16h 56m

1 stop

YYC11:19 pmCalgary

Sep 10

YYC6:29 amCalgary

13h 03m

1 stop

STL8:32 pmLambert-St Louis

$363

Find similar

American Airlines

Oct 20

STL4:34 pmLambert-St Louis

21h 00m

1 stop

YYC12:34 pmCalgary

Oct 24

YYC1:29 pmCalgary

17h 40m

1 stop

STL8:09 amLambert-St Louis

$366

Find similar

American Airlines

Sep 18

STL7:23 amLambert-St Louis

16h 56m

1 stop

YYC11:19 pmCalgary

Sep 22

YYC6:29 amCalgary

16h 19m

1 stop

STL11:48 pmLambert-St Louis

$370

Find similar

WestJet flights from St. Louis to Calgary

Our best WestJet deals on St. Louis to Calgary flight tickets

WestJet

Jul 27

STL6:00 amLambert-St Louis

15h 00m

1 stop

YYC8:00 pmCalgary

Jul 31

YYC9:45 amCalgary

28h 33m

1 stop

STL3:18 pmLambert-St Louis

$534

Find similar

WestJet

Jul 30

STL6:40 amLambert-St Louis

12h 48m

1 stop

YYC6:28 pmCalgary

Jul 31

YYC12:30 amCalgary

20h 12m

1 stop

STL9:42 pmLambert-St Louis

$593

Find similar

WestJet

Jul 26

STL7:20 amLambert-St Louis

13h 40m

1 stop

YYC8:00 pmCalgary

Jul 29

YYC6:30 pmCalgary

27h 50m

2 stops

STL11:20 pmLambert-St Louis

$597

Find similar

How to get the cheapest flight ticket from St. Louis to Calgary

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Calgary?

The month of January is, on average, the cheapest month to fly to Calgary from St. Louis, with most prices found around $361. If you aren’t able to travel during the month of January, then book flights to Calgary from St. Louis during April instead. Flights to Calgary in April, while not as cheap as those in January, still average around $443.

What is the cheapest day to depart on your flight to Calgary?

The cheapest day to depart on your flight to Calgary is on a Tuesday when prices can be found for as low as $456. This is often the case because there is less demand to fly during this day of the week. Flights from St. Louis to Calgary on a Sunday will generally be more expensive and average around $617. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Calgary?

The cheapest time of day to fly to Calgary is at noon when flights can be purchased for as low as $499. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $628 on average. Flights to Calgary from St. Louis in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Calgary?

You are more likely to see cheaper flights to Calgary from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Calgary for around $558 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Calgary from St. Louis for as low as $466 on momondo.

How have St. Louis to Calgary flight prices changed over time?

When to book flights from St. Louis to Calgary

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Calgary according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Calgary (STL to YYC) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Calgary

Best Price Found	$156
Fastest flight time	6h 08m
Direct flights	None
Airports in Calgary	1 airport

The best one-way flight to Calgary from St. Louis in the past 72 hours is $156. The best round-trip flight deal from St. Louis to Calgary found on momondo in the last 72 hours is $298.

The fastest flight from St. Louis to Calgary takes 6h 08m

There are no direct flights from St. Louis to Calgary. Popular non-direct route for this connection is Lambert-St Louis Airport - Calgary Airport.

There is 1 airport near Calgary: Calgary (YYC)

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How far is Lambert-St Louis to Calgary by plane?
Calgary is 1438.9 mi away from Lambert-St Louis. Flights usually cover this in 11h 05m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Lambert-St Louis Airport to Calgary Airport?
Prices for flights from Lambert-St Louis Airport to Calgary Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Calgary Airport?
As of July 2025, there are 5 operators available to choose from for flights from Lambert-St Louis Airport to Calgary Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Calgary Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Calgary Airport.
What documentation or ID do you need to fly to Calgary Airport?
The required travel and health documents for your Calgary Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Calgary Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from St. Louis to Calgary?
Based on momondo bookings for flights between St. Louis and Calgary, the leading airline is WestJet, making up 37% of the total bookings. Other popular airlines include United Airlines with 23%, American Airlines with 20%, and Air Canada with 14%.

Best airlines flying from St. Louis to Calgary

Compare and see reviews for airlines that fly from St. Louis to Calgary with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $168	Free Cancellation	Rating 8.0 7,958 reviews	Search Delta flights
Air Canada	PriceFrom $178	Free Cancellation	Rating 7.1 9,743 reviews	Search Air Canada flights
United Airlines	PriceFrom $343	Free Cancellation	Rating 7.4 8,864 reviews	Search United Airlines flights
American Airlines	PriceFrom $383	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
WestJet	PriceFrom $458	Free Cancellation	Rating 7.2 2,948 reviews	Search WestJet flights

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Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Calgary?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Calgary. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Calgary with flexible booking policies on momondo?

momondo does allow users to show only those flights to Calgary from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Calgary?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Calgary.

I’m not ready to book a flight from St. Louis to Calgary right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Calgary from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.