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Cheap flights from Calgary to St. Louis from $217

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 8/20. 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

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Find the cheapest flights from Calgary to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:40 am - 11:13 pm
YYC
-
STL
14h 33m
2 stops
Delta Logo
2:27 pm - 10:57 pm
STL
-
YYC
9h 30m
1 stop
$376Delta
Mon, May 4 - Sun, May 10
Air Canada Logo
5:45 am - 3:25 pm
YYC
-
STL
8h 40m
1 stop
Air Canada Logo
1:05 pm - 9:32 pm
STL
-
YYC
9h 27m
1 stop
$383Air Canada
Wed, Apr 29 - Sat, May 2
American Airlines Logo
1:40 pm - 8:24 am
YYC
-
STL
17h 44m
1 stop
American Airlines Logo
8:03 pm - 12:59 pm
STL
-
YYC
17h 56m
1 stop
$393American Airlines
Mon, May 4 - Sun, May 10
Air Canada Logo
7:00 am - 3:25 pm
YYC
-
STL
7h 25m
1 stop
Air Canada Logo
2:15 pm - 10:58 pm
STL
-
YYC
9h 43m
1 stop
$402Air Canada
Wed, Apr 29 - Sat, May 2
American Airlines Logo
12:45 pm - 8:54 am
YYC
-
STL
19h 09m
1 stop
American Airlines Logo
8:03 pm - 12:59 pm
STL
-
YYC
17h 56m
1 stop
$413American Airlines
Thu, Apr 16 - Mon, Apr 20
American Airlines Logo
1:40 pm - 11:47 am
YYC
-
STL
21h 07m
1 stop
American Airlines Logo
8:03 pm - 12:59 pm
STL
-
YYC
17h 56m
1 stop
$414American Airlines
Mon, May 4 - Sun, May 10
Delta Logo
7:40 am - 5:26 pm
YYC
-
STL
8h 46m
1 stop
Delta Logo
11:25 am - 10:57 pm
STL
-
YYC
12h 32m
2 stops
$422Delta
Mon, May 4 - Sat, May 16
Delta Logo
12:30 am - 10:34 am
YYC
-
STL
9h 04m
1 stop
Delta Logo
12:23 pm - 7:40 pm
STL
-
YYC
8h 17m
2 stops
$431Delta
Tue, Apr 28 - Sat, May 2
Delta Logo
12:30 am - 11:56 am
YYC
-
STL
10h 26m
1 stop
Delta Logo
2:20 pm - 11:00 pm
STL
-
YYC
9h 40m
1 stop
$446Delta
Mon, Apr 20 - Wed, Apr 22
United Airlines Logo
1:27 pm - 8:54 pm
YYC
-
STL
6h 27m
1 stop
United Airlines Logo
6:30 am - 11:32 am
STL
-
YYC
6h 02m
1 stop
$448United Airlines
Wed, Apr 29 - Sat, May 2

Air Canada flights from Calgary to St. Louis

Our best Air Canada deals on Calgary to St. Louis flight tickets
Air Canada
Apr 29
YYC5:45 amCalgary
8h 40m
1 stop
STL3:25 pmLambert-St Louis
May 2
STL1:05 pmLambert-St Louis
9h 27m
1 stop
YYC9:32 pmCalgary
$383
Air Canada
Apr 29
YYC7:00 amCalgary
7h 25m
1 stop
STL3:25 pmLambert-St Louis
May 2
STL2:15 pmLambert-St Louis
9h 43m
1 stop
YYC10:58 pmCalgary
$402
Air Canada
Apr 16
YYC5:45 amCalgary
8h 40m
1 stop
STL3:25 pmLambert-St Louis
Apr 17
STL4:05 pmLambert-St Louis
17h 23m
1 stop
YYC8:28 amCalgary
$519

United Airlines flights from Calgary to St. Louis

Our best United Airlines deals on Calgary to St. Louis flight tickets
United Airlines
Apr 29
YYC1:27 pmCalgary
6h 27m
1 stop
STL8:54 pmLambert-St Louis
May 2
STL6:30 amLambert-St Louis
6h 02m
1 stop
YYC11:32 amCalgary
$448
United Airlines
Apr 16
YYC1:27 pmCalgary
25h 41m
2 stops
STL4:08 pmLambert-St Louis
Apr 17
STL8:15 pmLambert-St Louis
16h 17m
1 stop
YYC11:32 amCalgary
$628

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 March 22, 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

Mon 5/4

7:40 am-11:13 pm

2 stops14h 33m

Lambert-St Louis

Sun 5/10

2:27 pm-10:57 pm

1 stop9h 30m

$376

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 4/29

5:45 am-3:25 pm

1 stop8h 40m

Lambert-St Louis

Sat 5/2

1:05 pm-9:32 pm

1 stop9h 27m

$383

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 5/4

1:40 pm-8:24 am

1 stop17h 44m

Lambert-St Louis

Sun 5/10

8:03 pm-12:59 pm

1 stop17h 56m

$393

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 4/29

7:00 am-3:25 pm

1 stop7h 25m

Lambert-St Louis

Sat 5/2

2:15 pm-10:58 pm

1 stop9h 43m

$402

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 4/16

12:45 pm-8:54 am

1 stop19h 09m

Lambert-St Louis

Mon 4/20

8:03 pm-12:59 pm

1 stop17h 56m

$413

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 5/4

1:40 pm-11:47 am

1 stop21h 07m

Lambert-St Louis

Sun 5/10

8:03 pm-12:59 pm

1 stop17h 56m

$414

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 5/4

7:40 am-5:26 pm

1 stop8h 46m

Lambert-St Louis

Sat 5/16

11:25 am-10:57 pm

2 stops12h 32m

$422

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 4/28

12:30 am-10:34 am

1 stop9h 04m

Lambert-St Louis

Sat 5/2

12:23 pm-7:40 pm

2 stops8h 17m

$431

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 4/20

12:30 am-11:56 am

1 stop10h 26m

Lambert-St Louis

Wed 4/22

2:20 pm-11:00 pm

1 stop9h 40m

$446
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 4/29

1:27 pm-8:54 pm

1 stop6h 27m

Lambert-St Louis

Sat 5/2

6:30 am-11:32 am

1 stop6h 02m

$448

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, 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 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 27m

Direct flights

None
The fastest flight from Calgary to St. Louis takes 6h 27m
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 27m.

  • 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?

  • 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?

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 AirlinesPriceFrom $422Free CancellationRating
7.4
9,455 reviews
Search United Airlines flights

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