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Cheap flights from St. Louis to Calgary from $148

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 8/24. 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 St. Louis to Calgary

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:57 pm - 5:00 pm
STL
-
YYC
25h 03m
2 stops
Multiple Airlines Logo
7:00 am - 5:22 pm
YYC
-
STL
9h 22m
1 stop
$318Multiple Airlines
Mon, Aug 17 - Fri, Aug 21
Multiple Airlines Logo
6:17 pm - 11:00 am
STL
-
YYC
17h 43m
1 stop
Multiple Airlines Logo
7:00 am - 5:22 pm
YYC
-
STL
9h 22m
1 stop
$323Multiple Airlines
Mon, Aug 24 - Mon, Aug 31
Multiple Airlines Logo
4:57 pm - 9:50 pm
STL
-
YYC
29h 53m
1 stop
Multiple Airlines Logo
7:00 am - 5:22 pm
YYC
-
STL
9h 22m
1 stop
$324Multiple Airlines
Mon, Aug 17 - Fri, Aug 21
Multiple Airlines Logo
10:35 am - 9:50 pm
STL
-
YYC
12h 15m
1 stop
Multiple Airlines Logo
12:20 am - 9:40 am
YYC
-
STL
8h 20m
1 stop
$327Multiple Airlines
Fri, Sep 25 - Fri, Oct 9
Multiple Airlines Logo
4:57 pm - 5:00 pm
STL
-
YYC
25h 03m
2 stops
Multiple Airlines Logo
8:45 am - 7:13 pm
YYC
-
STL
9h 28m
1 stop
$339Multiple Airlines
Mon, Aug 17 - Mon, Aug 24
Multiple Airlines Logo
4:57 pm - 11:00 am
STL
-
YYC
19h 03m
1 stop
Multiple Airlines Logo
12:20 am - 5:37 pm
YYC
-
STL
16h 17m
1 stop
$340Multiple Airlines
Mon, Aug 10 - Wed, Aug 12
Multiple Airlines Logo
10:35 am - 2:45 pm
STL
-
YYC
29h 10m
2 stops
Multiple Airlines Logo
12:20 am - 9:40 am
YYC
-
STL
8h 20m
1 stop
$341Multiple Airlines
Sat, Sep 26 - Fri, Oct 9
Multiple Airlines Logo
6:17 pm - 11:00 am
STL
-
YYC
17h 43m
1 stop
Multiple Airlines Logo
7:00 am - 5:22 pm
YYC
-
STL
9h 22m
1 stop
$342Multiple Airlines
Fri, Aug 28 - Mon, Aug 31
Multiple Airlines Logo
4:57 pm - 9:50 pm
STL
-
YYC
29h 53m
1 stop
Multiple Airlines Logo
8:45 am - 7:13 pm
YYC
-
STL
9h 28m
1 stop
$345Multiple Airlines
Mon, Aug 17 - Mon, Aug 24
Multiple Airlines Logo
4:57 pm - 9:50 pm
STL
-
YYC
29h 53m
1 stop
Multiple Airlines Logo
8:45 am - 7:13 pm
YYC
-
STL
9h 28m
1 stop
$346Multiple Airlines
Mon, Aug 17 - Mon, Aug 24

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WestJet flights from St. Louis to Calgary

Our best WestJet deals on St. Louis to Calgary flight tickets
WestJet
Sep 15
STL6:00 amLambert-St Louis
12h 10m
1 stop
YYC5:10 pmCalgary
Sep 23
YYC10:15 amCalgary
12h 01m
1 stop
STL11:16 pmLambert-St Louis
$409
WestJet
Sep 11
STL7:05 amLambert-St Louis
11h 05m
1 stop
YYC5:10 pmCalgary
Sep 15
YYC7:00 amCalgary
25h 00m
1 stop
STL9:00 amLambert-St Louis
$410
WestJet
Sep 9
STL7:05 amLambert-St Louis
11h 05m
1 stop
YYC5:10 pmCalgary
Sep 16
YYC10:15 amCalgary
12h 01m
1 stop
STL11:16 pmLambert-St Louis
$411

American Airlines flights from St. Louis to Calgary

Our best American Airlines deals on St. Louis to Calgary flight tickets
American Airlines
Aug 18
STL6:00 amLambert-St Louis
18h 42m
1 stop
YYC11:42 pmCalgary
Aug 25
YYC7:00 amCalgary
11h 27m
1 stop
STL7:27 pmLambert-St Louis
$392
American Airlines
Sep 19
STL7:27 amLambert-St Louis
17h 02m
1 stop
YYC11:29 pmCalgary
Sep 22
YYC7:00 amCalgary
16h 27m
1 stop
STL12:27 amLambert-St Louis
$399
American Airlines
Aug 5
STL6:00 amLambert-St Louis
18h 42m
1 stop
YYC11:42 pmCalgary
Aug 10
YYC7:00 amCalgary
16h 14m
1 stop
STL12:14 amLambert-St Louis
$542

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 July 22, 2026.
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

Cheapest round-trip

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 8/17

4:57 pm-5:00 pm

2 stops25h 03m

Calgary

Fri 8/21

7:00 am-5:22 pm

1 stop9h 22m

$318

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 8/24

6:17 pm-11:00 am

1 stop17h 43m

Calgary

Mon 8/31

7:00 am-5:22 pm

1 stop9h 22m

$323

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 8/17

4:57 pm-9:50 pm

1 stop29h 53m

Calgary

Fri 8/21

7:00 am-5:22 pm

1 stop9h 22m

$324
Quickest round-trip

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 9/25

10:35 am-9:50 pm

1 stop12h 15m

Calgary

Fri 10/9

12:20 am-9:40 am

1 stop8h 20m

$327

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 8/17

4:57 pm-5:00 pm

2 stops25h 03m

Calgary

Mon 8/24

8:45 am-7:13 pm

1 stop9h 28m

$339

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 8/10

4:57 pm-11:00 am

1 stop19h 03m

Calgary

Wed 8/12

12:20 am-5:37 pm

1 stop16h 17m

$340

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Sat 9/26

10:35 am-2:45 pm

2 stops29h 10m

Calgary

Fri 10/9

12:20 am-9:40 am

1 stop8h 20m

$341

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Fri 8/28

6:17 pm-11:00 am

1 stop17h 43m

Calgary

Mon 8/31

7:00 am-5:22 pm

1 stop9h 22m

$342

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 8/17

4:57 pm-9:50 pm

1 stop29h 53m

Calgary

Mon 8/24

8:45 am-7:13 pm

1 stop9h 28m

$345

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

Mon 8/17

4:57 pm-9:50 pm

1 stop29h 53m

Calgary

Mon 8/24

8:45 am-7:13 pm

1 stop9h 28m

$346

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 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 typical price of a round-trip flight between St. Louis and Calgary?

What is the cheapest month to fly to Calgary?

The month of April is, on average, the cheapest month to fly to Calgary from St. Louis, with most prices found around $559. If you aren’t able to travel during the month of April, then book flights to Calgary from St. Louis during October instead. Flights to Calgary in October, while not as cheap as those in April, still average around $567.

How far in advance should I book a flight from St. Louis 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 $663 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 $571 on momondo.

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

As of July 2026, prices for St. Louis to Calgary flights are approximately 2% more expensive when compared to flights at the same time last year.

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

Fastest flight time

6h 23m

Direct flights

None
The fastest flight from St. Louis to Calgary takes 6h 23m
There are no direct flights from St. Louis to Calgary. There are no popular flight routes from St. Louis to Calgary.
Search flight deals

Frequently asked questions about flying from St. Louis to Calgary

  • 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 23m, 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 $200Free CancellationRating
7.1
11,364 reviews
Search Air Canada flights
DeltaPriceFrom $267Free CancellationRating
7.8
8,475 reviews
Search Delta flights
United AirlinesPriceFrom $427Free CancellationRating
7.4
10,014 reviews
Search United Airlines flights
WestJetPriceFrom $461Free CancellationRating
7.2
3,411 reviews
Search WestJet flights
American AirlinesPriceFrom $504Free CancellationRating
7.1
11,836 reviews
Search American Airlines flights

  • United Airlines Flights From St. Louis to Calgary

    United Airlines flies from St. Louis to Calgary around 7 times per week, with 10,018 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from St. Louis to Calgary in the last 72 hours was $427 (round-trip), much lower than the average airfare cost of $709 for United Airlines flights on this route.

Traveling to a place near Calgary?

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

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