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

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

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

Prices for flights from Calgary Airport to Lambert-St Louis Airport are refreshed on a daily basis.

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

The number of operators available for flights from Calgary Airport to Lambert-St Louis Airport is 1 as of September 2025.

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

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The required travel and health documents for your Lambert-St Louis 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 Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$131 Cheap Flights from Calgary to St. Louis in 2025/26

Q: What is the typical price of a round-trip flight between Calgary and St. Louis?

Prices are currently low for flights on this route. Typical prices usually range from $431 to $628. The lowest price recently found on this route was $261.

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Find the cheapest flights from Calgary to St. Louis

Round-trip

One-way

Last minute

Cheap round-trip flights

1:29 pm - 8:09 amYYC-STL

17h 40m1 stop

4:34 pm - 12:34 pmSTL-YYC

21h 00m1 stop

$261American Airlines

Find Deal

Fri, Oct 10 - Mon, Oct 13

12:30 am - 10:16 amYYC-STL

8h 46m1 stop

5:15 pm - 5:15 pmSTL-YYC

25h 00m2 stops

$310

Find Deal

Thu, Oct 23 - Sun, Oct 26

8:55 am - 9:06 amYYC-STL

23h 11m1 stop

7:55 pm - 5:17 pmSTL-YYC

22h 22m2 stops

$329

Find Deal

Sun, Sep 28 - Wed, Oct 1

6:45 am - 8:53 pmYYC-STL

13h 08m1 stop

8:04 pm - 12:34 pmSTL-YYC

17h 30m1 stop

$332American Airlines

Find Deal

Tue, Oct 14 - Tue, Oct 21

8:55 am - 9:06 amYYC-STL

23h 11m1 stop

7:55 pm - 8:00 pmSTL-YYC

25h 05m2 stops

$343

Find Deal

Sun, Sep 28 - Fri, Oct 3

7:35 pm - 3:56 pmYYC-STL

19h 21m1 stop

10:17 am - 11:05 pmSTL-YYC

13h 48m2 stops

$350

Find Deal

Fri, Oct 24 - Sun, Oct 26

6:00 am - 11:09 pmYYC-STL

16h 09m2 stops

6:00 am - 3:05 pmSTL-YYC

10h 05m2 stops

$456WestJet

Find Deal

Thu, Sep 25 - Sun, Sep 28

7:00 am - 11:10 pmYYC-STL

15h 10m2 stops

8:50 am - 7:12 pmSTL-YYC

11h 22m2 stops

$483WestJet

Find Deal

Mon, Feb 9 - Thu, Feb 19

11:30 am - 11:07 pmYYC-STL

10h 37m2 stops

6:00 am - 1:54 pmSTL-YYC

8h 54m1 stop

$493Delta

Find Deal

Sun, Oct 12 - Sun, Oct 19

7:00 am - 4:45 pmYYC-STL

8h 45m2 stops

12:15 pm - 11:02 pmSTL-YYC

11h 47m2 stops

$568Delta

Find Deal

Sun, Sep 28 - Fri, Oct 3

American Airlines flights from Calgary to St. Louis

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

American Airlines

Oct 10

YYC1:29 pmCalgary

17h 40m

1 stop

STL8:09 amLambert-St Louis

Oct 13

STL4:34 pmLambert-St Louis

21h 00m

1 stop

YYC12:34 pmCalgary

$261

Find similar

American Airlines

Oct 14

YYC6:45 amCalgary

13h 08m

1 stop

STL8:53 pmLambert-St Louis

Oct 21

STL8:04 pmLambert-St Louis

17h 30m

1 stop

YYC12:34 pmCalgary

$332

Find similar

American Airlines

Feb 9

YYC1:40 pmCalgary

20h 28m

1 stop

STL11:08 amLambert-St Louis

Feb 19

STL5:27 amLambert-St Louis

6h 51m

1 stop

YYC11:18 amCalgary

$399

Find similar

WestJet flights from Calgary to St. Louis

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

WestJet

Sep 25

YYC6:00 amCalgary

16h 09m

2 stops

STL11:09 pmLambert-St Louis

Sep 28

STL6:00 amLambert-St Louis

10h 05m

2 stops

YYC3:05 pmCalgary

$456

Find similar

WestJet

Feb 9

YYC7:00 amCalgary

15h 10m

2 stops

STL11:10 pmLambert-St Louis

Feb 19

STL8:50 amLambert-St Louis

11h 22m

2 stops

YYC7:12 pmCalgary

$483

Find similar

WestJet

Sep 24

YYC12:20 amCalgary

11h 11m

2 stops

STL12:31 pmLambert-St Louis

Sep 28

STL6:00 amLambert-St Louis

10h 05m

2 stops

YYC3:05 pmCalgary

$486

Find similar

Fly from

Fly to

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 10/10

1:29 pm-8:09 am

1 stop17h 40m

Lambert-St Louis

Mon 10/13

4:34 pm-12:34 pm

1 stop21h 00m

$261

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 10/23

12:30 am-10:16 am

1 stop8h 46m

Lambert-St Louis

Sun 10/26

5:15 pm-5:15 pm

2 stops25h 00m

$310

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 9/28

8:55 am-9:06 am

1 stop23h 11m

Lambert-St Louis

Wed 10/1

7:55 pm-5:17 pm

2 stops22h 22m

$329

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 10/14

6:45 am-8:53 pm

1 stop13h 08m

Lambert-St Louis

Tue 10/21

8:04 pm-12:34 pm

1 stop17h 30m

$332

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 9/28

8:55 am-9:06 am

1 stop23h 11m

Lambert-St Louis

Fri 10/3

7:55 pm-8:00 pm

2 stops25h 05m

$343

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 10/24

7:35 pm-3:56 pm

1 stop19h 21m

Lambert-St Louis

Sun 10/26

10:17 am-11:05 pm

2 stops13h 48m

$350

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 9/25

6:00 am-11:09 pm

2 stops16h 09m

Lambert-St Louis

Sun 9/28

6:00 am-3:05 pm

2 stops10h 05m

$456

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 2/9

7:00 am-11:10 pm

2 stops15h 10m

Lambert-St Louis

Thu 2/19

8:50 am-7:12 pm

2 stops11h 22m

$483

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 10/12

11:30 am-11:07 pm

2 stops10h 37m

Lambert-St Louis

Sun 10/19

6:00 am-1:54 pm

1 stop8h 54m

$493

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 9/28

7:00 am-4:45 pm

2 stops8h 45m

Lambert-St Louis

Fri 10/3

12:15 pm-11:02 pm

2 stops11h 47m

$568

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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 typical price of a round-trip flight between Calgary and St. Louis?

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

In general, January is the cheapest month to fly from Calgary to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $296. The month of February is another great option to travel to St. Louis, with average flight prices from Calgary averaging around $413.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Friday when prices can be found for as low as $296. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $541. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

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

When to book flights from Calgary to St. Louis

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

Estimated round-trip price

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

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

Direct flights	None

There are no direct flights from Calgary to St. Louis. There are no popular flight routes from Calgary to St. Louis.

Search flight deals

How far is Calgary to Lambert-St Louis by plane?
The distance between Calgary and Lambert-St Louis is about 1438.9 mi. By plane, this route typically takes 5h 54m.
When did momondo last update prices for flights from Calgary Airport to Lambert-St Louis Airport?
Prices for flights from Calgary Airport to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Calgary Airport to Lambert-St Louis Airport?
The number of operators available for flights from Calgary Airport to Lambert-St Louis Airport is 1 as of September 2025.
How old do you have to be to fly from Calgary Airport to Lambert-St Louis 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 Calgary Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis 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 Lambert-St Louis 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 Calgary to St. Louis?
momondo data reveals that the most frequently booked airline on the route from Calgary to St. Louis is American Airlines, representing 100% of all bookings.

Best airlines flying from Calgary to St. Louis

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

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $309	Free Cancellation	Rating 7.2 10,000 reviews		Search American Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

O'Fallon

Fenton

Collinsville

Wentzville

Alton

St. Peters

Farmington

Festus

Glencoe

Clayton

Edwardsville

Eureka

Litchfield

Shrewsbury

Why use momondo?

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

Finding the right flight to St. Louis from Calgary is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to St. Louis from Calgary with this policy.

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

momondo helps you find the best flight between Calgary and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of Calgary to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.