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

American Airlines and Air Canada 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 February 2026.

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.

$172 Cheap Flights from Calgary to St. Louis in 2026

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Find the cheapest flights from Calgary to St. Louis

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:20 pm - 10:27 pm

YYC

STL

26h 07m

2 stops

2:09 pm - 11:43 am

STL

YYC

22h 34m

1 stop

$327Multiple Airlines

Mon, Mar 2 - Mon, Mar 9

5:35 am - 3:29 pm

YYC

STL

8h 54m

1 stop

4:05 pm - 1:14 am

STL

YYC

10h 09m

1 stop

$439Air Canada

Mon, Mar 2 - Mon, Mar 9

9:30 am - 10:27 pm

YYC

STL

11h 57m

1 stop

7:52 am - 6:28 pm

STL

YYC

35h 36m

2 stops

$461Multiple Airlines

Wed, Mar 4 - Sun, Mar 8

1:25 pm - 11:23 pm

YYC

STL

8h 58m

2 stops

6:29 am - 7:12 pm

STL

YYC

13h 43m

2 stops

$512Delta

Mon, Mar 2 - Mon, Mar 9

6:30 am - 3:28 pm

YYC

STL

7h 58m

1 stop

6:00 am - 3:32 pm

STL

YYC

10h 32m

2 stops

$527American Airlines

Thu, Feb 19 - Sun, Feb 22

8:30 am - 3:46 pm

YYC

STL

6h 16m

1 stop

9:23 am - 10:37 pm

STL

YYC

14h 14m

1 stop

$540United Airlines

Fri, Jul 31 - Sun, Aug 9

7:00 am - 10:43 am

YYC

STL

26h 43m

2 stops

5:29 pm - 4:15 pm

STL

YYC

23h 46m

2 stops

$543WestJet

Thu, Feb 19 - Sun, Feb 22

7:35 pm - 9:26 pm

YYC

STL

24h 51m

1 stop

3:49 pm - 11:19 am

STL

YYC

20h 30m

1 stop

$548Multiple Airlines

Thu, Feb 19 - Sun, Feb 22

7:00 am - 11:23 pm

YYC

STL

15h 23m

2 stops

6:29 am - 8:58 pm

STL

YYC

15h 29m

2 stops

$551WestJet

Wed, Mar 4 - Sun, Mar 8

United Airlines flights from Calgary to St. Louis

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

United Airlines

Jul 31

YYC8:30 amCalgary

6h 16m

1 stop

STL3:46 pmLambert-St Louis

Aug 9

STL9:23 amLambert-St Louis

14h 14m

1 stop

YYC10:37 pmCalgary

$540

United Airlines

Feb 5

YYC6:15 amCalgary

6h 01m

1 stop

STL1:16 pmLambert-St Louis

Feb 9

STL4:15 pmLambert-St Louis

6h 38m

1 stop

YYC9:53 pmCalgary

$593

United Airlines

Feb 5

YYC12:37 pmCalgary

9h 21m

1 stop

STL10:58 pmLambert-St Louis

Feb 9

STL8:45 amLambert-St Louis

14h 08m

1 stop

YYC9:53 pmCalgary

$595

WestJet flights from Calgary to St. Louis

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

WestJet

Feb 19

YYC7:00 amCalgary

26h 43m

2 stops

STL10:43 amLambert-St Louis

Feb 22

STL5:29 pmLambert-St Louis

23h 46m

2 stops

YYC4:15 pmCalgary

$543

WestJet

Mar 4

YYC7:00 amCalgary

15h 23m

2 stops

STL11:23 pmLambert-St Louis

Mar 8

STL6:29 amLambert-St Louis

15h 29m

2 stops

YYC8:58 pmCalgary

$551

WestJet

Feb 5

YYC6:30 amCalgary

9h 15m

1 stop

STL4:45 pmLambert-St Louis

Feb 9

STL6:10 amLambert-St Louis

14h 02m

2 stops

YYC7:12 pmCalgary

$649

Fly from

Fly to

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 3/2

7:20 pm-10:27 pm

2 stops26h 07m

Lambert-St Louis

Mon 3/9

2:09 pm-11:43 am

1 stop22h 34m

$327

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 3/2

5:35 am-3:29 pm

1 stop8h 54m

Lambert-St Louis

Mon 3/9

4:05 pm-1:14 am

1 stop10h 09m

$439

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 3/4

9:30 am-10:27 pm

1 stop11h 57m

Lambert-St Louis

Sun 3/8

7:52 am-6:28 pm

2 stops35h 36m

$461

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 3/2

1:25 pm-11:23 pm

2 stops8h 58m

Lambert-St Louis

Mon 3/9

6:29 am-7:12 pm

2 stops13h 43m

$512

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 2/19

6:30 am-3:28 pm

1 stop7h 58m

Lambert-St Louis

Sun 2/22

6:00 am-3:32 pm

2 stops10h 32m

$527

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 7/31

8:30 am-3:46 pm

1 stop6h 16m

Lambert-St Louis

Sun 8/9

9:23 am-10:37 pm

1 stop14h 14m

$540

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 2/19

7:00 am-10:43 am

2 stops26h 43m

Lambert-St Louis

Sun 2/22

5:29 pm-4:15 pm

2 stops23h 46m

$543

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 2/19

7:35 pm-9:26 pm

1 stop24h 51m

Lambert-St Louis

Sun 2/22

3:49 pm-11:19 am

1 stop20h 30m

$548

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 3/4

7:00 am-11:23 pm

2 stops15h 23m

Lambert-St Louis

Sun 3/8

6:29 am-8:58 pm

2 stops15h 29m

$551

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 4/8

8:15 pm-10:30 am

2 stops13h 15m

$172

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 cheapest month to fly to St. Louis?

In general, February 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 $413. The month of July is another great option to travel to St. Louis, with average flight prices from Calgary averaging around $416.

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

Fastest flight time	6h 01m
Direct flights	None

The fastest flight from Calgary to St. Louis takes 6h 01m

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 6h 01m.
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 February 2026.
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 United 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
United Airlines	PriceFrom $422	Free Cancellation	Rating 7.4 9,229 reviews		Search United Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

Florissant

O'Fallon

Collinsville

St. Peters

Fenton

Wentzville

Alton

Farmington

Clayton

Edwardsville

Eureka

Festus

Litchfield

Glencoe

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.