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Cheap flights from Calgary to St. Louis from $167

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 6/16. 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
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
7:00 am - 8:55 am
YYC
-
STL
24h 55m
1 stop
Multiple Airlines Logo
8:08 pm - 2:45 pm
STL
-
YYC
19h 37m
1 stop
$359Multiple Airlines
Fri, May 22 - Mon, May 25
Multiple Airlines Logo
7:00 am - 8:55 am
YYC
-
STL
24h 55m
1 stop
Multiple Airlines Logo
6:33 pm - 10:00 pm
STL
-
YYC
28h 27m
2 stops
$368Multiple Airlines
Sun, May 31 - Sun, Jun 7
Multiple Airlines Logo
7:00 am - 8:55 am
YYC
-
STL
24h 55m
1 stop
Multiple Airlines Logo
6:33 pm - 10:00 pm
STL
-
YYC
28h 27m
2 stops
$372Multiple Airlines
Sun, May 31 - Sun, Jun 7
Delta Logo
2:00 pm - 12:36 am
YYC
-
STL
9h 36m
1 stop
Delta Logo
2:15 pm - 11:13 pm
STL
-
YYC
9h 58m
1 stop
$376Delta
Fri, Oct 23 - Sun, Oct 25
American Airlines Logo
1:40 pm - 8:32 am
YYC
-
STL
17h 52m
1 stop
American Airlines Logo
7:00 am - 11:43 pm
STL
-
YYC
17h 43m
1 stop
$380American Airlines
Fri, May 22 - Mon, May 25
United Airlines Logo
9:30 am - 4:31 pm
YYC
-
STL
6h 01m
1 stop
United Airlines Logo
1:36 pm - 6:30 pm
STL
-
YYC
5h 54m
1 stop
$382United Airlines
Tue, Aug 25 - Wed, Aug 26
American Airlines Logo
1:40 pm - 8:32 am
YYC
-
STL
17h 52m
1 stop
American Airlines Logo
2:36 pm - 11:43 pm
STL
-
YYC
10h 07m
1 stop
$383American Airlines
Fri, May 22 - Mon, May 25
American Airlines Logo
1:40 pm - 8:32 am
YYC
-
STL
17h 52m
1 stop
American Airlines Logo
7:00 am - 11:43 pm
STL
-
YYC
17h 43m
1 stop
$385American Airlines
Fri, May 22 - Mon, May 25
American Airlines Logo
6:45 am - 5:21 pm
YYC
-
STL
9h 36m
1 stop
American Airlines Logo
7:00 am - 11:43 pm
STL
-
YYC
17h 43m
1 stop
$388American Airlines
Wed, May 20 - Thu, May 28
American Airlines Logo
1:40 pm - 8:32 am
YYC
-
STL
17h 52m
1 stop
American Airlines Logo
7:00 am - 11:42 pm
STL
-
YYC
17h 42m
1 stop
$391American Airlines
Wed, May 20 - Sun, Jun 7

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American Airlines flights from Calgary to St. Louis

Our best American Airlines deals on Calgary to St. Louis flight tickets
American Airlines
May 22
YYC1:40 pmCalgary
17h 52m
1 stop
STL8:32 amLambert-St Louis
May 25
STL7:00 amLambert-St Louis
17h 43m
1 stop
YYC11:43 pmCalgary
$380
American Airlines
May 22
YYC1:40 pmCalgary
17h 52m
1 stop
STL8:32 amLambert-St Louis
May 25
STL2:36 pmLambert-St Louis
10h 07m
1 stop
YYC11:43 pmCalgary
$383
American Airlines
May 22
YYC1:40 pmCalgary
17h 52m
1 stop
STL8:32 amLambert-St Louis
May 25
STL7:00 amLambert-St Louis
17h 43m
1 stop
YYC11:43 pmCalgary
$385

WestJet flights from Calgary to St. Louis

Our best WestJet deals on Calgary to St. Louis flight tickets
WestJet
Jun 19
YYC7:00 amCalgary
8h 46m
2 stops
STL4:46 pmLambert-St Louis
Jun 26
STL6:30 amLambert-St Louis
14h 35m
1 stop
YYC8:05 pmCalgary
$419
WestJet
Jun 26
YYC11:00 amCalgary
8h 39m
1 stop
STL8:39 pmLambert-St Louis
Jun 27
STL6:21 amLambert-St Louis
12h 49m
2 stops
YYC6:10 pmCalgary
$422
WestJet
Jun 19
YYC7:00 amCalgary
8h 46m
2 stops
STL4:46 pmLambert-St Louis
Jun 26
STL6:30 amLambert-St Louis
14h 35m
1 stop
YYC8:05 pmCalgary
$431

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 May 5, 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

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 5/22

7:00 am-8:55 am

1 stop24h 55m

Lambert-St Louis

Mon 5/25

8:08 pm-2:45 pm

1 stop19h 37m

$359

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 5/31

7:00 am-8:55 am

1 stop24h 55m

Lambert-St Louis

Sun 6/7

6:33 pm-10:00 pm

2 stops28h 27m

$368

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 5/31

7:00 am-8:55 am

1 stop24h 55m

Lambert-St Louis

Sun 6/7

6:33 pm-10:00 pm

2 stops28h 27m

$372

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 10/23

2:00 pm-12:36 am

1 stop9h 36m

Lambert-St Louis

Sun 10/25

2:15 pm-11:13 pm

1 stop9h 58m

$376

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 5/22

1:40 pm-8:32 am

1 stop17h 52m

Lambert-St Louis

Mon 5/25

7:00 am-11:43 pm

1 stop17h 43m

$380
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 8/25

9:30 am-4:31 pm

1 stop6h 01m

Lambert-St Louis

Wed 8/26

1:36 pm-6:30 pm

1 stop5h 54m

$382

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 5/22

1:40 pm-8:32 am

1 stop17h 52m

Lambert-St Louis

Mon 5/25

2:36 pm-11:43 pm

1 stop10h 07m

$383

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 5/22

1:40 pm-8:32 am

1 stop17h 52m

Lambert-St Louis

Mon 5/25

7:00 am-11:43 pm

1 stop17h 43m

$385

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 5/20

6:45 am-5:21 pm

1 stop9h 36m

Lambert-St Louis

Thu 5/28

7:00 am-11:43 pm

1 stop17h 43m

$388

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 5/20

1:40 pm-8:32 am

1 stop17h 52m

Lambert-St Louis

Sun 6/7

7:00 am-11:42 pm

1 stop17h 42m

$391

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?

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

In general, October 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 $385. 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 38m

Direct flights

None
The fastest flight from Calgary to St. Louis takes 9h 38m
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 38m.

  • 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
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
Shrewsbury
Grafton

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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