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Cheap flights from Calgary to St. Louis from $175

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Calgary to St. Louis departing on 10/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Calgary to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:20 am - 1:10 pmYYC  Calgary-STL Lambert-St Louis
11h 50m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
10:35 am - 9:50 pmSTL  Lambert-St Louis-YYC Calgary
12h 15m1 stop Atlanta Hartsfield-Jackson
$283Multiple Airlines
Tue, Oct 6 - Mon, Oct 12
Multiple Airlines Logo
12:20 am - 1:10 pmYYC  Calgary-STL Lambert-St Louis
11h 50m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
8:10 pm - 2:45 pmSTL  Lambert-St Louis-YYC Calgary
19h 35m1 stop Denver Intl
$317Multiple Airlines
Tue, Oct 6 - Wed, Oct 7
Multiple Airlines Logo
8:00 pm - 9:40 amYYC  Calgary-STL Lambert-St Louis
12h 40m2 stops Vancouver Intl Atlanta Hartsfield-Jackson
Multiple Airlines Logo
10:35 am - 9:50 pmSTL  Lambert-St Louis-YYC Calgary
12h 15m1 stop Atlanta Hartsfield-Jackson
$327Multiple Airlines
Wed, Oct 7 - Mon, Oct 12
Multiple Airlines Logo
7:00 am - 9:40 amYYC  Calgary-STL Lambert-St Louis
25h 40m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
10:35 am - 11:00 amSTL  Lambert-St Louis-YYC Calgary
25h 25m1 stop Atlanta Hartsfield-Jackson
$328Multiple Airlines
Sun, Oct 11 - Mon, Oct 19
Multiple Airlines Logo
7:00 am - 9:40 amYYC  Calgary-STL Lambert-St Louis
25h 40m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
10:35 am - 11:00 amSTL  Lambert-St Louis-YYC Calgary
25h 25m1 stop Atlanta Hartsfield-Jackson
$328Multiple Airlines
Sun, Oct 11 - Thu, Oct 15
Multiple Airlines Logo
12:20 am - 9:40 amYYC  Calgary-STL Lambert-St Louis
8h 20m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
10:35 am - 11:00 amSTL  Lambert-St Louis-YYC Calgary
25h 25m1 stop Atlanta Hartsfield-Jackson
$329Multiple Airlines
Sun, Oct 11 - Mon, Oct 19
Multiple Airlines Logo
12:20 am - 9:40 amYYC  Calgary-STL Lambert-St Louis
8h 20m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
10:35 am - 11:00 amSTL  Lambert-St Louis-YYC Calgary
25h 25m1 stop Atlanta Hartsfield-Jackson
$329Multiple Airlines
Sun, Oct 11 - Thu, Oct 15
Multiple Airlines Logo
7:00 am - 9:40 amYYC  Calgary-STL Lambert-St Louis
25h 40m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
10:35 am - 11:00 amSTL  Lambert-St Louis-YYC Calgary
25h 25m1 stop Atlanta Hartsfield-Jackson
$331Multiple Airlines
Sun, Oct 11 - Fri, Oct 16
Multiple Airlines Logo
7:00 am - 9:40 amYYC  Calgary-STL Lambert-St Louis
25h 40m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
10:35 am - 11:00 amSTL  Lambert-St Louis-YYC Calgary
25h 25m1 stop Atlanta Hartsfield-Jackson
$332Multiple Airlines
Sun, Oct 11 - Sun, Oct 18
Multiple Airlines Logo
12:20 am - 9:40 amYYC  Calgary-STL Lambert-St Louis
8h 20m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
10:35 am - 11:00 amSTL  Lambert-St Louis-YYC Calgary
25h 25m1 stop Atlanta Hartsfield-Jackson
$332Multiple Airlines
Sun, Oct 11 - Fri, Oct 16

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WestJet flights from Calgary to St. Louis

Our best WestJet deals on Calgary to St. Louis flight tickets
WestJet
Sep 2
YYC12:20 amCalgary
8h 00m
1 stop
STL9:20 amLambert-St Louis
Sep 10
STL6:15 amLambert-St Louis
15h 27m
1 stop
YYC8:42 pmCalgary
$357
WestJet
Sep 3
YYC9:00 pmCalgary
11h 20m
2 stops
STL9:20 amLambert-St Louis
Sep 10
STL11:21 amLambert-St Louis
7h 49m
2 stops
YYC6:10 pmCalgary
$368
WestJet
Aug 30
YYC9:00 pmCalgary
11h 20m
2 stops
STL9:20 amLambert-St Louis
Sep 6
STL11:13 amLambert-St Louis
9h 27m
2 stops
YYC7:40 pmCalgary
$374

United Airlines flights from Calgary to St. Louis

Our best United Airlines deals on Calgary to St. Louis flight tickets
United Airlines
Aug 7
YYC12:28 pmCalgary
10h 01m
1 stop
STL11:29 pmLambert-St Louis
Aug 11
STL4:40 pmLambert-St Louis
6h 08m
1 stop
YYC9:48 pmCalgary
$622
United Airlines
Aug 7
YYC12:28 pmCalgary
10h 01m
1 stop
STL11:29 pmLambert-St Louis
Aug 10
STL5:10 amLambert-St Louis
14h 00m
1 stop
YYC6:10 pmCalgary
$640

momondo Fare Finder

 
Customize your flight search to find flights from Calgary to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 6, 2026.
Use the filters below to find and compare flights from Calgary to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Tue 10/6

12:20 am-1:10 pm

1 stop11h 50m

Lambert-St Louis

Mon 10/12

10:35 am-9:50 pm

1 stop12h 15m

$283

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Tue 10/6

12:20 am-1:10 pm

1 stop11h 50m

Lambert-St Louis

Wed 10/7

8:10 pm-2:45 pm

1 stop19h 35m

$317

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Wed 10/7

8:00 pm-9:40 am

2 stops12h 40m

Lambert-St Louis

Mon 10/12

10:35 am-9:50 pm

1 stop12h 15m

$327

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sun 10/11

7:00 am-9:40 am

1 stop25h 40m

Lambert-St Louis

Mon 10/19

10:35 am-11:00 am

1 stop25h 25m

$328

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sun 10/11

7:00 am-9:40 am

1 stop25h 40m

Lambert-St Louis

Thu 10/15

10:35 am-11:00 am

1 stop25h 25m

$328

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sun 10/11

12:20 am-9:40 am

1 stop8h 20m

Lambert-St Louis

Mon 10/19

10:35 am-11:00 am

1 stop25h 25m

$329

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sun 10/11

12:20 am-9:40 am

1 stop8h 20m

Lambert-St Louis

Thu 10/15

10:35 am-11:00 am

1 stop25h 25m

$329

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sun 10/11

7:00 am-9:40 am

1 stop25h 40m

Lambert-St Louis

Fri 10/16

10:35 am-11:00 am

1 stop25h 25m

$331

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sun 10/11

7:00 am-9:40 am

1 stop25h 40m

Lambert-St Louis

Sun 10/18

10:35 am-11:00 am

1 stop25h 25m

$332

CalgarySt. Louis

YYC Calgary - STL Lambert-St Louis

YYCSTL

Calgary

Sun 10/11

12:20 am-9:40 am

1 stop8h 20m

Lambert-St Louis

Fri 10/16

10:35 am-11:00 am

1 stop25h 25m

$332

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

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

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 $429 to $505.
The lowest price recently found on this route was $283.

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

In general, May 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 $320. The month of March is another great option to travel to St. Louis, with average flight prices from Calgary averaging around $393.

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

9h 32m

Direct flights

None
The fastest flight from Calgary to St. Louis takes 9h 32m
There are no direct flights from Calgary to St. Louis. There are no popular flight routes from Calgary to St. Louis.
Search flight deals

Frequently asked questions about flying from Calgary to St. Louis

  • 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 9h 32m.

  • 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 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.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
St. Peters
Maryland Heights
Florissant
Collinsville
Alton
O'Fallon
Clayton
Farmington
Fenton
Wentzville
Festus
Eureka
Edwardsville
Litchfield
Grafton
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.

An easier way to manage your St. Louis trip

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