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Cheap flights from Calgary to St. Louis from $204

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 9/6. 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.
Delta Logo
7:45 am - 5:37 pm
YYC
-
STL
8h 52m
1 stop
Delta Logo
2:27 pm - 11:01 pm
STL
-
YYC
9h 34m
1 stop
$352Delta
Fri, Sep 18 - Mon, Sep 21
Delta Logo
7:45 am - 5:37 pm
YYC
-
STL
8h 52m
1 stop
Delta Logo
2:27 pm - 11:01 pm
STL
-
YYC
9h 34m
1 stop
$353Delta
Fri, Sep 18 - Mon, Sep 21
American Airlines Logo
12:45 pm - 11:42 pm
YYC
-
STL
9h 57m
1 stop
American Airlines Logo
3:32 pm - 9:34 pm
STL
-
YYC
7h 02m
1 stop
$376American Airlines
Thu, Aug 13 - Mon, Aug 17
United Airlines Logo
6:00 am - 8:46 pm
YYC
-
STL
13h 46m
1 stop
United Airlines Logo
5:30 pm - 10:36 pm
STL
-
YYC
6h 06m
1 stop
$380United Airlines
Tue, Sep 1 - Tue, Sep 8
Air Canada Logo
7:45 pm - 2:02 pm
YYC
-
STL
17h 17m
1 stop
Air Canada Logo
12:10 pm - 9:32 pm
STL
-
YYC
10h 22m
1 stop
$383Air Canada
Thu, Aug 13 - Wed, Aug 19
WestJet Logo
12:20 am - 4:17 pm
YYC
-
STL
14h 57m
1 stop
WestJet Logo
10:44 am - 5:10 pm
STL
-
YYC
7h 26m
1 stop
$384WestJet
Wed, Aug 5 - Sun, Aug 9
Multiple Airlines Logo
12:20 am - 5:37 pm
YYC
-
STL
16h 17m
1 stop
Multiple Airlines Logo
8:08 pm - 2:45 pm
STL
-
YYC
19h 37m
1 stop
$386Multiple Airlines
Wed, Aug 12 - Mon, Aug 17
WestJet Logo
7:00 am - 10:28 am
YYC
-
STL
26h 28m
2 stops
WestJet Logo
6:30 am - 8:15 pm
STL
-
YYC
14h 45m
1 stop
$387WestJet
Fri, Jul 24 - Sun, Jul 26
WestJet Logo
9:00 pm - 9:54 am
YYC
-
STL
11h 54m
2 stops
WestJet Logo
8:48 am - 6:10 pm
STL
-
YYC
10h 22m
2 stops
$388WestJet
Thu, Aug 6 - Sun, Aug 9
WestJet Logo
6:30 pm - 9:06 am
YYC
-
STL
13h 36m
2 stops
WestJet Logo
6:30 am - 8:15 pm
STL
-
YYC
14h 45m
1 stop
$389WestJet
Fri, Jul 17 - Mon, Jul 20

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WestJet flights from Calgary to St. Louis

Our best WestJet deals on Calgary to St. Louis flight tickets
WestJet
Aug 5
YYC12:20 amCalgary
14h 57m
1 stop
STL4:17 pmLambert-St Louis
Aug 9
STL10:44 amLambert-St Louis
7h 26m
1 stop
YYC5:10 pmCalgary
$384
WestJet
Jul 24
YYC7:00 amCalgary
26h 28m
2 stops
STL10:28 amLambert-St Louis
Jul 26
STL6:30 amLambert-St Louis
14h 45m
1 stop
YYC8:15 pmCalgary
$387
WestJet
Aug 6
YYC9:00 pmCalgary
11h 54m
2 stops
STL9:54 amLambert-St Louis
Aug 9
STL8:48 amLambert-St Louis
10h 22m
2 stops
YYC6:10 pmCalgary
$388

Air Canada flights from Calgary to St. Louis

Our best Air Canada deals on Calgary to St. Louis flight tickets
Air Canada
Aug 13
YYC7:45 pmCalgary
17h 17m
1 stop
STL2:02 pmLambert-St Louis
Aug 19
STL12:10 pmLambert-St Louis
10h 22m
1 stop
YYC9:32 pmCalgary
$383
Air Canada
Aug 13
YYC11:55 pmCalgary
13h 07m
1 stop
STL2:02 pmLambert-St Louis
Aug 19
STL12:10 pmLambert-St Louis
11h 50m
2 stops
YYC11:00 pmCalgary
$402

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 June 20, 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 9/18

7:45 am-5:37 pm

1 stop8h 52m

Lambert-St Louis

Mon 9/21

2:27 pm-11:01 pm

1 stop9h 34m

$352

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 9/18

7:45 am-5:37 pm

1 stop8h 52m

Lambert-St Louis

Mon 9/21

2:27 pm-11:01 pm

1 stop9h 34m

$353
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 8/13

12:45 pm-11:42 pm

1 stop9h 57m

Lambert-St Louis

Mon 8/17

3:32 pm-9:34 pm

1 stop7h 02m

$376

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 9/1

6:00 am-8:46 pm

1 stop13h 46m

Lambert-St Louis

Tue 9/8

5:30 pm-10:36 pm

1 stop6h 06m

$380

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 8/13

7:45 pm-2:02 pm

1 stop17h 17m

Lambert-St Louis

Wed 8/19

12:10 pm-9:32 pm

1 stop10h 22m

$383

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 8/5

12:20 am-4:17 pm

1 stop14h 57m

Lambert-St Louis

Sun 8/9

10:44 am-5:10 pm

1 stop7h 26m

$384

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 8/12

12:20 am-5:37 pm

1 stop16h 17m

Lambert-St Louis

Mon 8/17

8:08 pm-2:45 pm

1 stop19h 37m

$386

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 7/24

7:00 am-10:28 am

2 stops26h 28m

Lambert-St Louis

Sun 7/26

6:30 am-8:15 pm

1 stop14h 45m

$387

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 8/6

9:00 pm-9:54 am

2 stops11h 54m

Lambert-St Louis

Sun 8/9

8:48 am-6:10 pm

2 stops10h 22m

$388

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 7/17

6:30 pm-9:06 am

2 stops13h 36m

Lambert-St Louis

Mon 7/20

6:30 am-8:15 pm

1 stop14h 45m

$389

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 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

8h 52m

Direct flights

None
The fastest flight from Calgary to St. Louis takes 8h 52m
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 8h 52m.

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

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