Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Calgary from $127

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Calgary departing on 12/10. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? 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 St. Louis to Calgary

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:45 pm - 11:14 amSTL-YYC
16h 29m2 stops
Multiple Airlines Logo
12:30 am - 11:01 pmYYC-STL
21h 31m1 stop
$270Multiple Airlines
Find Deal
Wed, Nov 12 - Tue, Nov 18
American Airlines Logo
6:44 pm - 12:48 pmSTL-YYC
19h 04m1 stop
American Airlines Logo
1:40 pm - 1:03 pmYYC-STL
22h 23m1 stop
$306American Airlines
Find Deal
Mon, Jan 12 - Sat, Jan 17
American Airlines Logo
6:00 am - 9:43 pmSTL-YYC
16h 43m2 stops
American Airlines Logo
1:40 pm - 10:22 amYYC-STL
19h 42m1 stop
$315American Airlines
Find Deal
Tue, Jan 13 - Fri, Jan 16
United Airlines Logo
6:40 pm - 2:20 pmSTL-YYC
20h 40m2 stops
United Airlines Logo
2:13 pm - 12:29 pmYYC-STL
21h 16m2 stops
$476United Airlines
Find Deal
Mon, Jan 12 - Sat, Jan 17
Alaska Airlines Logo
7:00 am - 6:17 pmSTL-YYC
12h 17m1 stop
Alaska Airlines Logo
6:55 pm - 1:52 pmYYC-STL
17h 57m1 stop
$537Alaska Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
United Airlines Logo
9:00 am - 9:53 pmSTL-YYC
13h 53m1 stop
United Airlines Logo
3:30 pm - 3:40 pmYYC-STL
23h 10m3 stops
$539United Airlines
Find Deal
Wed, Dec 10 - Sat, Dec 13
Alaska Airlines Logo
7:00 am - 6:10 pmSTL-YYC
12h 10m1 stop
Alaska Airlines Logo
7:00 pm - 3:18 pmYYC-STL
19h 18m1 stop
$548Alaska Airlines
Find Deal
Fri, Nov 14 - Mon, Nov 17
Delta Logo
6:34 am - 5:50 pmSTL-YYC
12h 16m2 stops
Delta Logo
1:25 pm - 12:46 amYYC-STL
10h 21m2 stops
$598Delta
Find Deal
Thu, Nov 20 - Sun, Nov 23
WestJet Logo
6:00 am - 7:15 pmSTL-YYC
14h 15m2 stops
WestJet Logo
7:00 am - 10:16 pmYYC-STL
14h 16m2 stops
$615WestJet
Find Deal
Fri, Dec 19 - Mon, Dec 29
Delta Logo
7:30 am - 1:07 pmSTL-YYC
6h 37m1 stop
Delta Logo
1:25 pm - 12:37 amYYC-STL
10h 12m2 stops
$629Delta
Find Deal
Tue, Mar 10 - Wed, Mar 11

American Airlines flights from St. Louis to Calgary

Our best American Airlines deals on St. Louis to Calgary flight tickets
American Airlines
Jan 12
STL6:44 pmLambert-St Louis
19h 04m
1 stop
YYC12:48 pmCalgary
Jan 17
YYC1:40 pmCalgary
22h 23m
1 stop
STL1:03 pmLambert-St Louis
$306
Find similar
American Airlines
Jan 13
STL6:00 amLambert-St Louis
16h 43m
2 stops
YYC9:43 pmCalgary
Jan 16
YYC1:40 pmCalgary
19h 42m
1 stop
STL10:22 amLambert-St Louis
$315
Find similar
American Airlines
Feb 7
STL6:43 pmLambert-St Louis
19h 05m
1 stop
YYC12:48 pmCalgary
Feb 11
YYC1:40 pmCalgary
20h 30m
1 stop
STL11:10 amLambert-St Louis
$347
Find similar

United Airlines flights from St. Louis to Calgary

Our best United Airlines deals on St. Louis to Calgary flight tickets
United Airlines
Jan 12
STL6:40 pmLambert-St Louis
20h 40m
2 stops
YYC2:20 pmCalgary
Jan 17
YYC2:13 pmCalgary
21h 16m
2 stops
STL12:29 pmLambert-St Louis
$476
Find similar
United Airlines
Dec 10
STL9:00 amLambert-St Louis
13h 53m
1 stop
YYC9:53 pmCalgary
Dec 13
YYC3:30 pmCalgary
23h 10m
3 stops
STL3:40 pmLambert-St Louis
$539
Find similar
United Airlines
Dec 1
STL5:24 pmLambert-St Louis
19h 11m
1 stop
YYC11:35 amCalgary
Dec 8
YYC3:30 pmCalgary
23h 10m
3 stops
STL3:40 pmLambert-St Louis
$579
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Calgary 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 October 14, 2025.
Use the filters below to find and compare flights from St. Louis to Calgary that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 11/12

7:45 pm-11:14 am

2 stops16h 29m

Calgary

Tue 11/18

12:30 am-11:01 pm

1 stop21h 31m

$270

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 1/12

6:44 pm-12:48 pm

1 stop19h 04m

Calgary

Sat 1/17

1:40 pm-1:03 pm

1 stop22h 23m

$306

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 1/13

6:00 am-9:43 pm

2 stops16h 43m

Calgary

Fri 1/16

1:40 pm-10:22 am

1 stop19h 42m

$315

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 1/12

6:40 pm-2:20 pm

2 stops20h 40m

Calgary

Sat 1/17

2:13 pm-12:29 pm

2 stops21h 16m

$476

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 3/10

7:00 am-6:17 pm

1 stop12h 17m

Calgary

Wed 3/11

6:55 pm-1:52 pm

1 stop17h 57m

$537

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Wed 12/10

9:00 am-9:53 pm

1 stop13h 53m

Calgary

Sat 12/13

3:30 pm-3:40 pm

3 stops23h 10m

$539

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 11/14

7:00 am-6:10 pm

1 stop12h 10m

Calgary

Mon 11/17

7:00 pm-3:18 pm

1 stop19h 18m

$548

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Thu 11/20

6:34 am-5:50 pm

2 stops12h 16m

Calgary

Sun 11/23

1:25 pm-12:46 am

2 stops10h 21m

$598

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 12/19

6:00 am-7:15 pm

2 stops14h 15m

Calgary

Mon 12/29

7:00 am-10:16 pm

2 stops14h 16m

$615

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Tue 3/10

7:30 am-1:07 pm

1 stop6h 37m

Calgary

Wed 3/11

1:25 pm-12:37 am

2 stops10h 12m

$629

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

See travel insights to Calgary from

How to get the cheapest flight ticket from St. Louis to Calgary

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 Calgary?

The month of January is, on average, the cheapest month to fly to Calgary from St. Louis, with most prices found around $361. If you aren’t able to travel during the month of January, then book flights to Calgary from St. Louis during April instead. Flights to Calgary in April, while not as cheap as those in January, still average around $443.

What is the cheapest day to depart on your flight to Calgary?

The cheapest day to depart on your flight to Calgary is on a Tuesday when prices can be found for as low as $456. This is often the case because there is less demand to fly during this day of the week. Flights from St. Louis to Calgary on a Sunday will generally be more expensive and average around $617. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Calgary?

The cheapest time of day to fly to Calgary is at noon when flights can be purchased for as low as $499. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $628 on average. Flights to Calgary from St. Louis in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Calgary?

You are more likely to see cheaper flights to Calgary from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Calgary for around $560 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Calgary from St. Louis for as low as $395 on momondo.

How have St. Louis to Calgary flight prices changed over time?

When to book flights from St. Louis to Calgary

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Calgary according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Calgary (STL to YYC) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Calgary

Direct flights

None
There are no direct flights from St. Louis to Calgary. There are no popular flight routes from St. Louis to Calgary.
Search flight deals

  • How far is Lambert-St Louis to Calgary by plane?

    Calgary is 1438.9 mi away from Lambert-St Louis. Flights usually cover this in 6h 17m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Calgary Airport?

    Prices for flights from Lambert-St Louis Airport to Calgary Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Calgary Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Calgary 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 Lambert-St Louis Airport to Calgary Airport.

  • What documentation or ID do you need to fly to Calgary Airport?

    The required travel and health documents for your Calgary 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 Calgary 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 St. Louis to Calgary?

Best airlines flying from St. Louis to Calgary

Compare and see reviews for airlines that fly from St. Louis to Calgary with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $158Free CancellationRating
7.1
10,288 reviews
Search Air Canada flights
DeltaPriceFrom $168Free CancellationRating
7.9
7,973 reviews
Search Delta flights
United AirlinesPriceFrom $343Free CancellationRating
7.4
8,973 reviews
Search United Airlines flights
American AirlinesPriceFrom $383Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights
WestJetPriceFrom $462Free CancellationRating
7.2
3,124 reviews
Search WestJet flights

Traveling to a place near Calgary?

Book flights to Calgary if you plan to visit one of these locations
Banff
Canmore
Lake Louise
Airdrie
Drumheller
Radium Hot Springs
Kananaskis

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Calgary. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Calgary from St. Louis which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Calgary.

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

Yes momondo offers price alerts on flights to Calgary from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Calgary 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
Thu 11/13
Thu 11/20
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Canada