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Cheap flights from Calgary to St. Louis from C$ 288

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 15/10. 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

Discover deals from 900+ travel sites with momondo.

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 a.m. - 5:37 p.m.
YYC
-
STL
8h 52m
1 stop
Delta Logo
2:27 p.m. - 11:01 p.m.
STL
-
YYC
9h 34m
1 stop
C$ 494Delta
Fri, 18 Sep - Mon, 21 Sep
Delta Logo
7:45 a.m. - 5:37 p.m.
YYC
-
STL
8h 52m
1 stop
Delta Logo
2:27 p.m. - 11:01 p.m.
STL
-
YYC
9h 34m
1 stop
C$ 495Delta
Fri, 18 Sep - Mon, 21 Sep
American Airlines Logo
12:45 p.m. - 11:42 p.m.
YYC
-
STL
9h 57m
1 stop
American Airlines Logo
3:32 p.m. - 9:34 p.m.
STL
-
YYC
7h 02m
1 stop
C$ 527American Airlines
Thu, 13 Aug - Mon, 17 Aug
United Airlines Logo
6:00 a.m. - 8:46 p.m.
YYC
-
STL
13h 46m
1 stop
United Airlines Logo
5:30 p.m. - 10:36 p.m.
STL
-
YYC
6h 06m
1 stop
C$ 533United Airlines
Tue, 1 Sep - Tue, 8 Sep
Air Canada Logo
7:45 p.m. - 2:02 p.m.
YYC
-
STL
17h 17m
1 stop
Air Canada Logo
12:10 p.m. - 9:32 p.m.
STL
-
YYC
10h 22m
1 stop
C$ 537Air Canada
Thu, 13 Aug - Wed, 19 Aug
WestJet Logo
12:20 a.m. - 4:17 p.m.
YYC
-
STL
14h 57m
1 stop
WestJet Logo
10:44 a.m. - 5:10 p.m.
STL
-
YYC
7h 26m
1 stop
C$ 539WestJet
Wed, 5 Aug - Sun, 9 Aug
Multiple Airlines Logo
12:20 a.m. - 5:37 p.m.
YYC
-
STL
16h 17m
1 stop
Multiple Airlines Logo
8:08 p.m. - 2:45 p.m.
STL
-
YYC
19h 37m
1 stop
C$ 541Multiple Airlines
Wed, 12 Aug - Mon, 17 Aug
WestJet Logo
7:00 a.m. - 10:28 a.m.
YYC
-
STL
26h 28m
2 stops
WestJet Logo
6:30 a.m. - 8:15 p.m.
STL
-
YYC
14h 45m
1 stop
C$ 543WestJet
Fri, 24 Jul - Sun, 26 Jul
WestJet Logo
9:00 p.m. - 9:54 a.m.
YYC
-
STL
11h 54m
2 stops
WestJet Logo
8:48 a.m. - 6:10 p.m.
STL
-
YYC
10h 22m
2 stops
C$ 544WestJet
Thu, 6 Aug - Sun, 9 Aug
WestJet Logo
6:30 p.m. - 9:06 a.m.
YYC
-
STL
13h 36m
2 stops
WestJet Logo
6:30 a.m. - 8:15 p.m.
STL
-
YYC
14h 45m
1 stop
C$ 546WestJet
Fri, 17 Jul - Mon, 20 Jul

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United Airlines flights from Calgary to St. Louis

Our best United Airlines deals on Calgary to St. Louis flight tickets
United Airlines
1 Sep
YYC6:00 a.m.Calgary
13h 46m
1 stop
STL8:46 p.m.Lambert-St Louis
8 Sep
STL5:30 p.m.Lambert-St Louis
6h 06m
1 stop
YYC10:36 p.m.Calgary
C$ 533
United Airlines
19 Jun
YYC12:28 p.m.Calgary
8h 02m
1 stop
STL9:30 p.m.Lambert-St Louis
26 Jun
STL5:10 a.m.Lambert-St Louis
14h 00m
1 stop
YYC6:10 p.m.Calgary
C$ 801
United Airlines
19 Jun
YYC12:28 p.m.Calgary
8h 02m
1 stop
STL9:30 p.m.Lambert-St Louis
26 Jun
STL5:10 a.m.Lambert-St Louis
14h 00m
1 stop
YYC6:10 p.m.Calgary
C$ 861

WestJet flights from Calgary to St. Louis

Our best WestJet deals on Calgary to St. Louis flight tickets
WestJet
5 Aug
YYC12:20 a.m.Calgary
14h 57m
1 stop
STL4:17 p.m.Lambert-St Louis
9 Aug
STL10:44 a.m.Lambert-St Louis
7h 26m
1 stop
YYC5:10 p.m.Calgary
C$ 539
WestJet
24 Jul
YYC7:00 a.m.Calgary
26h 28m
2 stops
STL10:28 a.m.Lambert-St Louis
26 Jul
STL6:30 a.m.Lambert-St Louis
14h 45m
1 stop
YYC8:15 p.m.Calgary
C$ 543
WestJet
6 Aug
YYC9:00 p.m.Calgary
11h 54m
2 stops
STL9:54 a.m.Lambert-St Louis
9 Aug
STL8:48 a.m.Lambert-St Louis
10h 22m
2 stops
YYC6:10 p.m.Calgary
C$ 544

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 96,600 searches. Data last updated 18 June 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 18/9

7:45 a.m.-5:37 p.m.

1 stop8h 52m

Lambert-St Louis

Mon 21/9

2:27 p.m.-11:01 p.m.

1 stop9h 34m

C$ 494

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 18/9

7:45 a.m.-5:37 p.m.

1 stop8h 52m

Lambert-St Louis

Mon 21/9

2:27 p.m.-11:01 p.m.

1 stop9h 34m

C$ 495
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 13/8

12:45 p.m.-11:42 p.m.

1 stop9h 57m

Lambert-St Louis

Mon 17/8

3:32 p.m.-9:34 p.m.

1 stop7h 02m

C$ 527

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 1/9

6:00 a.m.-8:46 p.m.

1 stop13h 46m

Lambert-St Louis

Tue 8/9

5:30 p.m.-10:36 p.m.

1 stop6h 06m

C$ 533

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 13/8

7:45 p.m.-2:02 p.m.

1 stop17h 17m

Lambert-St Louis

Wed 19/8

12:10 p.m.-9:32 p.m.

1 stop10h 22m

C$ 537

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 5/8

12:20 a.m.-4:17 p.m.

1 stop14h 57m

Lambert-St Louis

Sun 9/8

10:44 a.m.-5:10 p.m.

1 stop7h 26m

C$ 539

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 12/8

12:20 a.m.-5:37 p.m.

1 stop16h 17m

Lambert-St Louis

Mon 17/8

8:08 p.m.-2:45 p.m.

1 stop19h 37m

C$ 541

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 24/7

7:00 a.m.-10:28 a.m.

2 stops26h 28m

Lambert-St Louis

Sun 26/7

6:30 a.m.-8:15 p.m.

1 stop14h 45m

C$ 543

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 6/8

9:00 p.m.-9:54 a.m.

2 stops11h 54m

Lambert-St Louis

Sun 9/8

8:48 a.m.-6:10 p.m.

2 stops10h 22m

C$ 544

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 17/7

6:30 p.m.-9:06 a.m.

2 stops13h 36m

Lambert-St Louis

Mon 20/7

6:30 a.m.-8:15 p.m.

1 stop14h 45m

C$ 546

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?

The month of May is, on average, the cheapest month to fly to St. Louis from Calgary, with most prices found around C$ 449. If you don’t want to visit St. Louis in May, then you should wait until March to fly from Calgary, when ticket prices are also cheap, with an average price of C$ 551.

Can stopping save me money on Calgary to St. Louis flights?

You could potentially save up to 19% on your flight if you consider stops on a Calgary to St. Louis flight.

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

5h 59m

Direct flights

None
The fastest flight from Calgary to St. Louis takes 5h 59m
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 straight-line distance from Calgary to Lambert-St Louis is 2315.6 km. In terms of flight time, this usually takes a little over 5h 59m.

  • 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?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify 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 travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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
Air CanadaPriceFrom C$ 265Free CancellationRating
7.1
11,218 reviews
Search Air Canada flights
DeltaPriceFrom C$ 321Free CancellationRating
7.8
8,416 reviews
Search Delta flights
WestJetPriceFrom C$ 676Free CancellationRating
7.2
3,375 reviews
Search WestJet flights

Why use momondo?

Why should I use momondo to find a flight deal from Calgary to St. Louis?

It is quick and easy to find Calgary to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights from Calgary to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Calgary to St. Louis flights to just show those with flexible booking policies.

How can momondo help me find flights from Calgary to St. Louis?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Calgary.

I’m not ready to book a flight from Calgary to St. Louis right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Calgary to St. Louis flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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