Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Calgary to St. Louis from C$ 244

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 18/6. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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 a.m. - 8:55 a.m.
YYC
-
STL
24h 55m
1 stop
Multiple Airlines Logo
6:33 p.m. - 10:00 p.m.
STL
-
YYC
28h 27m
2 stops
C$ 501Multiple Airlines
Sun, 31 May - Sun, 7 Jun
Multiple Airlines Logo
7:00 a.m. - 8:55 a.m.
YYC
-
STL
24h 55m
1 stop
Multiple Airlines Logo
6:33 p.m. - 10:00 p.m.
STL
-
YYC
28h 27m
2 stops
C$ 506Multiple Airlines
Sun, 31 May - Sun, 7 Jun
American Airlines Logo
1:40 p.m. - 8:26 a.m.
YYC
-
STL
17h 46m
1 stop
American Airlines Logo
7:00 a.m. - 11:42 p.m.
STL
-
YYC
17h 42m
1 stop
C$ 512American Airlines
Mon, 1 Jun - Sun, 7 Jun
American Airlines Logo
1:40 p.m. - 8:32 a.m.
YYC
-
STL
17h 52m
1 stop
American Airlines Logo
7:00 a.m. - 11:43 p.m.
STL
-
YYC
17h 43m
1 stop
C$ 524American Airlines
Fri, 22 May - Mon, 25 May
American Airlines Logo
6:45 a.m. - 5:21 p.m.
YYC
-
STL
9h 36m
1 stop
American Airlines Logo
7:00 a.m. - 11:43 p.m.
STL
-
YYC
17h 43m
1 stop
C$ 528American Airlines
Wed, 20 May - Thu, 28 May
American Airlines Logo
1:40 p.m. - 8:32 a.m.
YYC
-
STL
17h 52m
1 stop
American Airlines Logo
7:00 a.m. - 11:42 p.m.
STL
-
YYC
17h 42m
1 stop
C$ 532American Airlines
Wed, 20 May - Sun, 7 Jun
Delta Logo
7:15 a.m. - 5:56 p.m.
YYC
-
STL
9h 41m
1 stop
Delta Logo
6:30 a.m. - 12:47 p.m.
STL
-
YYC
7h 17m
1 stop
C$ 544Delta
Fri, 23 Oct - Sun, 25 Oct
Multiple Airlines Logo
7:00 a.m. - 8:55 a.m.
YYC
-
STL
24h 55m
1 stop
Multiple Airlines Logo
6:33 p.m. - 11:00 a.m.
STL
-
YYC
17h 27m
1 stop
C$ 557Multiple Airlines
Sun, 31 May - Sun, 7 Jun
Multiple Airlines Logo
8:45 a.m. - 7:23 p.m.
YYC
-
STL
9h 38m
1 stop
Multiple Airlines Logo
6:33 p.m. - 10:00 p.m.
STL
-
YYC
28h 27m
2 stops
C$ 562Multiple Airlines
Mon, 1 Jun - Sun, 7 Jun
Multiple Airlines Logo
8:45 a.m. - 7:23 p.m.
YYC
-
STL
9h 38m
1 stop
Multiple Airlines Logo
5:27 p.m. - 8:25 p.m.
STL
-
YYC
51h 58m
2 stops
C$ 568Multiple Airlines
Fri, 22 May - Mon, 25 May

Delta flights from Calgary to St. Louis

Our best Delta deals on Calgary to St. Louis flight tickets
Delta
23 Oct
YYC7:15 a.m.Calgary
9h 41m
1 stop
STL5:56 p.m.Lambert-St Louis
25 Oct
STL6:30 a.m.Lambert-St Louis
7h 17m
1 stop
YYC12:47 p.m.Calgary
C$ 544
Delta
3 Jun
YYC6:45 a.m.Calgary
15h 36m
1 stop
STL11:21 p.m.Lambert-St Louis
10 Jun
STL8:49 a.m.Lambert-St Louis
15h 12m
2 stops
YYC11:01 p.m.Calgary
C$ 576
Delta
3 Jun
YYC6:45 a.m.Calgary
13h 24m
2 stops
STL9:09 p.m.Lambert-St Louis
10 Jun
STL8:49 a.m.Lambert-St Louis
15h 12m
2 stops
YYC11:01 p.m.Calgary
C$ 599

American Airlines flights from Calgary to St. Louis

Our best American Airlines deals on Calgary to St. Louis flight tickets
American Airlines
1 Jun
YYC1:40 p.m.Calgary
17h 46m
1 stop
STL8:26 a.m.Lambert-St Louis
7 Jun
STL7:00 a.m.Lambert-St Louis
17h 42m
1 stop
YYC11:42 p.m.Calgary
C$ 512
American Airlines
22 May
YYC1:40 p.m.Calgary
17h 52m
1 stop
STL8:32 a.m.Lambert-St Louis
25 May
STL7:00 a.m.Lambert-St Louis
17h 43m
1 stop
YYC11:43 p.m.Calgary
C$ 524
American Airlines
20 May
YYC6:45 a.m.Calgary
9h 36m
1 stop
STL5:21 p.m.Lambert-St Louis
28 May
STL7:00 a.m.Lambert-St Louis
17h 43m
1 stop
YYC11:43 p.m.Calgary
C$ 528

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 7 May 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

Sun 31/5

7:00 a.m.-8:55 a.m.

1 stop24h 55m

Lambert-St Louis

Sun 7/6

6:33 p.m.-10:00 p.m.

2 stops28h 27m

C$ 501

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 31/5

7:00 a.m.-8:55 a.m.

1 stop24h 55m

Lambert-St Louis

Sun 7/6

6:33 p.m.-10:00 p.m.

2 stops28h 27m

C$ 506

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 1/6

1:40 p.m.-8:26 a.m.

1 stop17h 46m

Lambert-St Louis

Sun 7/6

7:00 a.m.-11:42 p.m.

1 stop17h 42m

C$ 512

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 22/5

1:40 p.m.-8:32 a.m.

1 stop17h 52m

Lambert-St Louis

Mon 25/5

7:00 a.m.-11:43 p.m.

1 stop17h 43m

C$ 524

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 20/5

6:45 a.m.-5:21 p.m.

1 stop9h 36m

Lambert-St Louis

Thu 28/5

7:00 a.m.-11:43 p.m.

1 stop17h 43m

C$ 528

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 20/5

1:40 p.m.-8:32 a.m.

1 stop17h 52m

Lambert-St Louis

Sun 7/6

7:00 a.m.-11:42 p.m.

1 stop17h 42m

C$ 532
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 23/10

7:15 a.m.-5:56 p.m.

1 stop9h 41m

Lambert-St Louis

Sun 25/10

6:30 a.m.-12:47 p.m.

1 stop7h 17m

C$ 544

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 31/5

7:00 a.m.-8:55 a.m.

1 stop24h 55m

Lambert-St Louis

Sun 7/6

6:33 p.m.-11:00 a.m.

1 stop17h 27m

C$ 557

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 1/6

8:45 a.m.-7:23 p.m.

1 stop9h 38m

Lambert-St Louis

Sun 7/6

6:33 p.m.-10:00 p.m.

2 stops28h 27m

C$ 562

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 22/5

8:45 a.m.-7:23 p.m.

1 stop9h 38m

Lambert-St Louis

Mon 25/5

5:27 p.m.-8:25 p.m.

2 stops51h 58m

C$ 568

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

The month of October is, on average, the cheapest month to fly to St. Louis from Calgary, with most prices found around C$ 524. If you don’t want to visit St. Louis in October, then you should wait until March to fly from Calgary, when ticket prices are also cheap, with an average price of C$ 535.

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 46m

Direct flights

None
The fastest flight from Calgary to St. Louis takes 6h 46m
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 6h 46m.

  • 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$ 257Free CancellationRating
7.1
11,004 reviews
Search Air Canada flights
DeltaPriceFrom C$ 312Free CancellationRating
7.9
8,459 reviews
Search Delta flights
United AirlinesPriceFrom C$ 536Free CancellationRating
7.4
9,690 reviews
Search United Airlines flights
WestJetPriceFrom C$ 586Free CancellationRating
7.2
3,331 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.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 6/6
Sat 13/6
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States