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Cheap flights from Calgary to St. Louis from C$ 190

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 13/12. 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

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Find the cheapest flights from Calgary to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
1:31 p.m. - 1:17 p.m.YYC-STL
22h 46m1 stop
American Airlines Logo
8:01 p.m. - 12:51 p.m.STL-YYC
17h 50m1 stop
C$ 348American Airlines
Find Deal
Mon, 22 Dec - Tue, 30 Dec
American Airlines Logo
1:31 p.m. - 8:35 a.m.YYC-STL
18h 04m1 stop
American Airlines Logo
8:01 p.m. - 12:51 p.m.STL-YYC
17h 50m1 stop
C$ 542American Airlines
Find Deal
Fri, 26 Dec - Tue, 30 Dec
American Airlines Logo
1:31 p.m. - 11:45 p.m.YYC-STL
9h 14m1 stop
American Airlines Logo
5:16 p.m. - 12:48 p.m.STL-YYC
20h 32m1 stop
C$ 552American Airlines
Find Deal
Thu, 18 Dec - Mon, 22 Dec
Multiple Airlines Logo
7:35 p.m. - 9:09 p.m.YYC-STL
24h 34m1 stop
Multiple Airlines Logo
7:03 p.m. - 11:44 a.m.STL-YYC
41h 41m2 stops
C$ 584Multiple Airlines
Find Deal
Wed, 26 Nov - Mon, 1 Dec
Multiple Airlines Logo
7:35 p.m. - 9:09 p.m.YYC-STL
24h 34m1 stop
Multiple Airlines Logo
7:03 p.m. - 11:44 a.m.STL-YYC
41h 41m2 stops
C$ 592Multiple Airlines
Find Deal
Wed, 26 Nov - Mon, 1 Dec
WestJet Logo
8:15 p.m. - 6:35 p.m.YYC-STL
21h 20m2 stops
WestJet Logo
6:00 a.m. - 7:15 p.m.STL-YYC
14h 15m2 stops
C$ 726WestJet
Find Deal
Wed, 26 Nov - Mon, 1 Dec
WestJet Logo
7:00 p.m. - 9:59 a.m.YYC-STL
13h 59m2 stops
WestJet Logo
5:17 p.m. - 11:44 a.m.STL-YYC
19h 27m1 stop
C$ 729WestJet
Find Deal
Wed, 26 Nov - Mon, 1 Dec
Air Canada Logo
6:15 p.m. - 12:28 p.m.YYC-STL
17h 13m2 stops
Air Canada Logo
11:05 a.m. - 12:14 a.m.STL-YYC
14h 09m2 stops
C$ 804Air Canada
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Wed, 26 Nov - Mon, 1 Dec
United Airlines Logo
2:13 p.m. - 10:51 a.m.YYC-STL
19h 38m2 stops
United Airlines Logo
5:24 p.m. - 2:21 p.m.STL-YYC
21h 57m3 stops
C$ 997United Airlines
Find Deal
Wed, 26 Nov - Mon, 1 Dec
United Airlines Logo
2:13 p.m. - 12:28 p.m.YYC-STL
21h 15m2 stops
United Airlines Logo
5:24 p.m. - 2:21 p.m.STL-YYC
21h 57m3 stops
C$ 1,078United Airlines
Find Deal
Wed, 26 Nov - Mon, 1 Dec

American Airlines flights from Calgary to St. Louis

Our best American Airlines deals on Calgary to St. Louis flight tickets
American Airlines
22 Dec
YYC1:31 p.m.Calgary
22h 46m
1 stop
STL1:17 p.m.Lambert-St Louis
30 Dec
STL8:01 p.m.Lambert-St Louis
17h 50m
1 stop
YYC12:51 p.m.Calgary
C$ 348
Find similar
American Airlines
26 Dec
YYC1:31 p.m.Calgary
18h 04m
1 stop
STL8:35 a.m.Lambert-St Louis
30 Dec
STL8:01 p.m.Lambert-St Louis
17h 50m
1 stop
YYC12:51 p.m.Calgary
C$ 542
Find similar
American Airlines
18 Dec
YYC1:31 p.m.Calgary
9h 14m
1 stop
STL11:45 p.m.Lambert-St Louis
22 Dec
STL5:16 p.m.Lambert-St Louis
20h 32m
1 stop
YYC12:48 p.m.Calgary
C$ 552
Find similar

Delta flights from Calgary to St. Louis

Our best Delta deals on Calgary to St. Louis flight tickets
Delta
28 Nov
YYC3:07 p.m.Calgary
7h 16m
1 stop
STL11:23 p.m.Lambert-St Louis
2 Dec
STL12:49 p.m.Lambert-St Louis
11h 24m
2 stops
YYC11:13 p.m.Calgary
C$ 645
Find similar
Delta
26 Nov
YYC7:45 a.m.Calgary
10h 12m
1 stop
STL6:57 p.m.Lambert-St Louis
1 Dec
STL6:00 a.m.Lambert-St Louis
8h 53m
1 stop
YYC1:53 p.m.Calgary
C$ 684
Find similar
Delta
14 Dec
YYC7:35 a.m.Calgary
10h 35m
1 stop
STL7:10 p.m.Lambert-St Louis
21 Dec
STL6:05 a.m.Lambert-St Louis
8h 35m
1 stop
YYC1:40 p.m.Calgary
C$ 723
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 30 October 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

Mon 22/12

1:31 p.m.-1:17 p.m.

1 stop22h 46m

Lambert-St Louis

Tue 30/12

8:01 p.m.-12:51 p.m.

1 stop17h 50m

C$ 348

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 26/12

1:31 p.m.-8:35 a.m.

1 stop18h 04m

Lambert-St Louis

Tue 30/12

8:01 p.m.-12:51 p.m.

1 stop17h 50m

C$ 542

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 18/12

1:31 p.m.-11:45 p.m.

1 stop9h 14m

Lambert-St Louis

Mon 22/12

5:16 p.m.-12:48 p.m.

1 stop20h 32m

C$ 552

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 26/11

7:35 p.m.-9:09 p.m.

1 stop24h 34m

Lambert-St Louis

Mon 1/12

7:03 p.m.-11:44 a.m.

2 stops41h 41m

C$ 584

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 26/11

7:35 p.m.-9:09 p.m.

1 stop24h 34m

Lambert-St Louis

Mon 1/12

7:03 p.m.-11:44 a.m.

2 stops41h 41m

C$ 592

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 26/11

8:15 p.m.-6:35 p.m.

2 stops21h 20m

Lambert-St Louis

Mon 1/12

6:00 a.m.-7:15 p.m.

2 stops14h 15m

C$ 726

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 26/11

7:00 p.m.-9:59 a.m.

2 stops13h 59m

Lambert-St Louis

Mon 1/12

5:17 p.m.-11:44 a.m.

1 stop19h 27m

C$ 729

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 26/11

6:15 p.m.-12:28 p.m.

2 stops17h 13m

Lambert-St Louis

Mon 1/12

11:05 a.m.-12:14 a.m.

2 stops14h 09m

C$ 804

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 26/11

2:13 p.m.-10:51 a.m.

2 stops19h 38m

Lambert-St Louis

Mon 1/12

5:24 p.m.-2:21 p.m.

3 stops21h 57m

C$ 997

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 26/11

2:13 p.m.-12:28 p.m.

2 stops21h 15m

Lambert-St Louis

Mon 1/12

5:24 p.m.-2:21 p.m.

3 stops21h 57m

C$ 1,078

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 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 January is, on average, the cheapest month to fly to St. Louis from Calgary, with most prices found around C$ 413. If you don’t want to visit St. Louis in January, then you should wait until February to fly from Calgary, when ticket prices are also cheap, with an average price of C$ 577.

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$ 439. The most expensive day to fly to St. Louis is Friday, with ticket prices averaging around C$ 779.

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$ 488. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are C$ 716 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

Direct flights

None
There are no direct flights from Calgary to St. Louis. There are no popular flight routes from Calgary to St. Louis.
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 58m.

  • 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$ 340Free CancellationRating
7.1
10,381 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 449Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
WestJetPriceFrom C$ 576Free CancellationRating
7.2
3,152 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
Chesterfield
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.

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