Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Calgary to St. Louis from C$ 249

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 17/9. 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

Logo
8:55 a.m. - 9:06 a.m.YYC-STL
23h 11m1 stop
Logo
7:55 p.m. - 2:45 p.m.STL-YYC
19h 50m1 stop
C$ 389
Find Deal
Sun, 14 Sep - Sun, 21 Sep
Logo
8:55 a.m. - 9:11 a.m.YYC-STL
23h 16m1 stop
Logo
7:54 p.m. - 2:45 p.m.STL-YYC
19h 51m1 stop
C$ 422
Find Deal
Thu, 28 Aug - Tue, 2 Sep
American Airlines Logo
6:29 a.m. - 11:30 a.m.YYC-STL
28h 01m1 stop
American Airlines Logo
6:10 a.m. - 11:19 p.m.STL-YYC
18h 09m1 stop
C$ 443American Airlines
Find Deal
Fri, 5 Sep - Sat, 13 Sep
Air Canada Logo
12:20 a.m. - 3:18 p.m.YYC-STL
13h 58m1 stop
Air Canada Logo
1:30 p.m. - 11:16 p.m.STL-YYC
10h 46m1 stop
C$ 563Air Canada
Find Deal
Thu, 25 Sep - Sun, 28 Sep
United Airlines Logo
6:15 a.m. - 9:50 p.m.YYC-STL
14h 35m1 stop
United Airlines Logo
8:54 a.m. - 9:48 p.m.STL-YYC
13h 54m1 stop
C$ 594United Airlines
Find Deal
Wed, 13 Aug - Sat, 16 Aug
Air Canada Logo
8:00 a.m. - 7:38 p.m.YYC-STL
10h 38m1 stop
Air Canada Logo
9:15 a.m. - 6:25 p.m.STL-YYC
10h 10m2 stops
C$ 605Air Canada
Find Deal
Fri, 5 Sep - Sat, 13 Sep
Delta Logo
6:40 a.m. - 2:29 p.m.YYC-STL
6h 49m1 stop
Delta Logo
3:30 p.m. - 10:57 p.m.STL-YYC
8h 27m2 stops
C$ 627Delta
Find Deal
Wed, 13 Aug - Sat, 16 Aug
Delta Logo
7:55 a.m. - 5:47 p.m.YYC-STL
8h 52m1 stop
Delta Logo
11:29 a.m. - 10:57 p.m.STL-YYC
12h 28m2 stops
C$ 659Delta
Find Deal
Thu, 28 Aug - Tue, 2 Sep
WestJet Logo
12:30 a.m. - 4:06 p.m.YYC-STL
14h 36m1 stop
WestJet Logo
11:29 a.m. - 6:40 p.m.STL-YYC
8h 11m2 stops
C$ 699WestJet
Find Deal
Sat, 30 Aug - Wed, 3 Sep
WestJet Logo
9:55 a.m. - 9:33 a.m.YYC-STL
22h 38m2 stops
WestJet Logo
6:40 a.m. - 6:24 p.m.STL-YYC
12h 44m1 stop
C$ 711WestJet
Find Deal
Fri, 26 Sep - Sun, 28 Sep

Air Canada flights from Calgary to St. Louis

Our best Air Canada deals on Calgary to St. Louis flight tickets
Air Canada
25 Sep
YYC12:20 a.m.Calgary
13h 58m
1 stop
STL3:18 p.m.Lambert-St Louis
28 Sep
STL1:30 p.m.Lambert-St Louis
10h 46m
1 stop
YYC11:16 p.m.Calgary
C$ 563
Find similar
Air Canada
5 Sep
YYC8:00 a.m.Calgary
10h 38m
1 stop
STL7:38 p.m.Lambert-St Louis
13 Sep
STL9:15 a.m.Lambert-St Louis
10h 10m
2 stops
YYC6:25 p.m.Calgary
C$ 605
Find similar
Air Canada
26 Aug
YYC1:10 a.m.Calgary
13h 11m
1 stop
STL3:21 p.m.Lambert-St Louis
1 Sep
STL4:00 p.m.Lambert-St Louis
8h 25m
1 stop
YYC11:25 p.m.Calgary
C$ 614
Find similar

Delta flights from Calgary to St. Louis

Our best Delta deals on Calgary to St. Louis flight tickets
Delta
13 Aug
YYC6:40 a.m.Calgary
6h 49m
1 stop
STL2:29 p.m.Lambert-St Louis
16 Aug
STL3:30 p.m.Lambert-St Louis
8h 27m
2 stops
YYC10:57 p.m.Calgary
C$ 627
Find similar
Delta
28 Aug
YYC7:55 a.m.Calgary
8h 52m
1 stop
STL5:47 p.m.Lambert-St Louis
2 Sep
STL11:29 a.m.Lambert-St Louis
12h 28m
2 stops
YYC10:57 p.m.Calgary
C$ 659
Find similar
Delta
27 Aug
YYC7:55 a.m.Calgary
7h 50m
2 stops
STL4:45 p.m.Lambert-St Louis
1 Sep
STL7:35 a.m.Lambert-St Louis
12h 05m
2 stops
YYC6:40 p.m.Calgary
C$ 667
Find similar

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 31 July 2025.
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

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 14/9

8:55 a.m.-9:06 a.m.

1 stop23h 11m

Lambert-St Louis

Sun 21/9

7:55 p.m.-2:45 p.m.

1 stop19h 50m

C$ 389

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 28/8

8:55 a.m.-9:11 a.m.

1 stop23h 16m

Lambert-St Louis

Tue 2/9

7:54 p.m.-2:45 p.m.

1 stop19h 51m

C$ 422

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 5/9

6:29 a.m.-11:30 a.m.

1 stop28h 01m

Lambert-St Louis

Sat 13/9

6:10 a.m.-11:19 p.m.

1 stop18h 09m

C$ 443

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 25/9

12:20 a.m.-3:18 p.m.

1 stop13h 58m

Lambert-St Louis

Sun 28/9

1:30 p.m.-11:16 p.m.

1 stop10h 46m

C$ 563

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 13/8

6:15 a.m.-9:50 p.m.

1 stop14h 35m

Lambert-St Louis

Sat 16/8

8:54 a.m.-9:48 p.m.

1 stop13h 54m

C$ 594

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 5/9

8:00 a.m.-7:38 p.m.

1 stop10h 38m

Lambert-St Louis

Sat 13/9

9:15 a.m.-6:25 p.m.

2 stops10h 10m

C$ 605

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 13/8

6:40 a.m.-2:29 p.m.

1 stop6h 49m

Lambert-St Louis

Sat 16/8

3:30 p.m.-10:57 p.m.

2 stops8h 27m

C$ 627

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 28/8

7:55 a.m.-5:47 p.m.

1 stop8h 52m

Lambert-St Louis

Tue 2/9

11:29 a.m.-10:57 p.m.

2 stops12h 28m

C$ 659

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 30/8

12:30 a.m.-4:06 p.m.

1 stop14h 36m

Lambert-St Louis

Wed 3/9

11:29 a.m.-6:40 p.m.

2 stops8h 11m

C$ 699

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 26/9

9:55 a.m.-9:33 a.m.

2 stops22h 38m

Lambert-St Louis

Sun 28/9

6:40 a.m.-6:24 p.m.

1 stop12h 44m

C$ 711

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 cheapest month to fly to St. Louis?

The month of January is, on average, the cheapest month to fly to St. Louis from Calgary, with most prices found around C$ 410. If you don’t want to visit St. Louis in January, then you should wait until October to fly from Calgary, when ticket prices are also cheap, with an average price of C$ 534.

What is the cheapest day to depart on your flight to St. Louis?

Our data shows that Sunday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as C$ 435. The most expensive day to fly to St. Louis is Friday, with ticket prices averaging around C$ 772.

What is the cheapest time of day to depart on your flight to St. Louis?

The cheapest time of day to fly to St. Louis is in the afternoon when flights can be purchased for as low as C$ 484. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are C$ 710 on average. Flights to St. Louis from Calgary in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

Best price found

C$ 249

Fastest flight time

5h 43m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Calgary in the past 72 hours is C$ 249. The best round-trip flight deal from Calgary to St. Louis found on momondo in the last 72 hours is C$ 389.
The fastest flight from Calgary to St. Louis takes 5h 43m
There are no direct flights from Calgary to St. Louis. Popular non-direct route for this connection is Calgary Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

  • 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 49m.

  • 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$ 337Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights
DeltaPriceFrom C$ 378Free CancellationRating
8.0
7,981 reviews
Search Delta flights
United AirlinesPriceFrom C$ 445Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
WestJetPriceFrom C$ 526Free CancellationRating
7.2
2,978 reviews
Search WestJet flights

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
Chesterfield
Collinsville
Litchfield

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
Tue 5/8
Tue 12/8
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States