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Cheap flights from Calgary to St. Louis from C$ 298

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 20/8. 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

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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.
Delta Logo
7:40 a.m. - 11:13 p.m.
YYC
-
STL
14h 33m
2 stops
Delta Logo
2:27 p.m. - 10:57 p.m.
STL
-
YYC
9h 30m
1 stop
C$ 516Delta
Mon, 4 May - Sun, 10 May
Delta Logo
12:30 p.m. - 12:21 a.m.
YYC
-
STL
10h 51m
1 stop
Delta Logo
2:20 p.m. - 11:00 p.m.
STL
-
YYC
9h 40m
1 stop
C$ 517Delta
Sun, 5 Apr - Tue, 14 Apr
United Airlines Logo
12:34 p.m. - 9:13 p.m.
YYC
-
STL
7h 39m
1 stop
United Airlines Logo
6:00 a.m. - 11:32 a.m.
STL
-
YYC
6h 32m
1 stop
C$ 519United Airlines
Tue, 19 May - Wed, 27 May
Air Canada Logo
5:45 a.m. - 3:25 p.m.
YYC
-
STL
8h 40m
1 stop
Air Canada Logo
1:05 p.m. - 9:32 p.m.
STL
-
YYC
9h 27m
1 stop
C$ 525Air Canada
Wed, 29 Apr - Sat, 2 May
American Airlines Logo
1:40 p.m. - 8:24 a.m.
YYC
-
STL
17h 44m
1 stop
American Airlines Logo
8:03 p.m. - 12:59 p.m.
STL
-
YYC
17h 56m
1 stop
C$ 539American Airlines
Mon, 4 May - Sun, 10 May
Air Canada Logo
7:00 a.m. - 3:25 p.m.
YYC
-
STL
7h 25m
1 stop
Air Canada Logo
1:05 p.m. - 9:32 p.m.
STL
-
YYC
9h 27m
1 stop
C$ 546Air Canada
Wed, 29 Apr - Sat, 2 May
Air Canada Logo
7:00 a.m. - 3:25 p.m.
YYC
-
STL
7h 25m
1 stop
Air Canada Logo
2:15 p.m. - 10:58 p.m.
STL
-
YYC
9h 43m
1 stop
C$ 551Air Canada
Wed, 29 Apr - Sat, 2 May
American Airlines Logo
1:40 p.m. - 11:47 a.m.
YYC
-
STL
21h 07m
1 stop
American Airlines Logo
8:03 p.m. - 12:59 p.m.
STL
-
YYC
17h 56m
1 stop
C$ 568American Airlines
Mon, 4 May - Sun, 10 May
Delta Logo
7:40 a.m. - 5:26 p.m.
YYC
-
STL
8h 46m
1 stop
Delta Logo
11:25 a.m. - 10:57 p.m.
STL
-
YYC
12h 32m
2 stops
C$ 579Delta
Mon, 4 May - Sat, 16 May
Delta Logo
12:25 p.m. - 11:13 p.m.
YYC
-
STL
9h 48m
2 stops
Delta Logo
12:23 p.m. - 7:40 p.m.
STL
-
YYC
8h 17m
2 stops
C$ 591Delta
Wed, 29 Apr - Sat, 2 May

Air Canada flights from Calgary to St. Louis

Our best Air Canada deals on Calgary to St. Louis flight tickets
Air Canada
29 Apr
YYC5:45 a.m.Calgary
8h 40m
1 stop
STL3:25 p.m.Lambert-St Louis
2 May
STL1:05 p.m.Lambert-St Louis
9h 27m
1 stop
YYC9:32 p.m.Calgary
C$ 525
Air Canada
29 Apr
YYC7:00 a.m.Calgary
7h 25m
1 stop
STL3:25 p.m.Lambert-St Louis
2 May
STL1:05 p.m.Lambert-St Louis
9h 27m
1 stop
YYC9:32 p.m.Calgary
C$ 546
Air Canada
29 Apr
YYC7:00 a.m.Calgary
7h 25m
1 stop
STL3:25 p.m.Lambert-St Louis
2 May
STL2:15 p.m.Lambert-St Louis
9h 43m
1 stop
YYC10:58 p.m.Calgary
C$ 551

Delta flights from Calgary to St. Louis

Our best Delta deals on Calgary to St. Louis flight tickets
Delta
4 May
YYC7:40 a.m.Calgary
14h 33m
2 stops
STL11:13 p.m.Lambert-St Louis
10 May
STL2:27 p.m.Lambert-St Louis
9h 30m
1 stop
YYC10:57 p.m.Calgary
C$ 516
Delta
5 Apr
YYC12:30 p.m.Calgary
10h 51m
1 stop
STL12:21 a.m.Lambert-St Louis
14 Apr
STL2:20 p.m.Lambert-St Louis
9h 40m
1 stop
YYC11:00 p.m.Calgary
C$ 517
Delta
4 May
YYC7:40 a.m.Calgary
8h 46m
1 stop
STL5:26 p.m.Lambert-St Louis
16 May
STL11:25 a.m.Lambert-St Louis
12h 32m
2 stops
YYC10:57 p.m.Calgary
C$ 579

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 23 March 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

Mon 4/5

7:40 a.m.-11:13 p.m.

2 stops14h 33m

Lambert-St Louis

Sun 10/5

2:27 p.m.-10:57 p.m.

1 stop9h 30m

C$ 516

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 5/4

12:30 p.m.-12:21 a.m.

1 stop10h 51m

Lambert-St Louis

Tue 14/4

2:20 p.m.-11:00 p.m.

1 stop9h 40m

C$ 517
Quickest round-trip

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 19/5

12:34 p.m.-9:13 p.m.

1 stop7h 39m

Lambert-St Louis

Wed 27/5

6:00 a.m.-11:32 a.m.

1 stop6h 32m

C$ 519

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 29/4

5:45 a.m.-3:25 p.m.

1 stop8h 40m

Lambert-St Louis

Sat 2/5

1:05 p.m.-9:32 p.m.

1 stop9h 27m

C$ 525

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 4/5

1:40 p.m.-8:24 a.m.

1 stop17h 44m

Lambert-St Louis

Sun 10/5

8:03 p.m.-12:59 p.m.

1 stop17h 56m

C$ 539

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 29/4

7:00 a.m.-3:25 p.m.

1 stop7h 25m

Lambert-St Louis

Sat 2/5

1:05 p.m.-9:32 p.m.

1 stop9h 27m

C$ 546

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 29/4

7:00 a.m.-3:25 p.m.

1 stop7h 25m

Lambert-St Louis

Sat 2/5

2:15 p.m.-10:58 p.m.

1 stop9h 43m

C$ 551

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 4/5

1:40 p.m.-11:47 a.m.

1 stop21h 07m

Lambert-St Louis

Sun 10/5

8:03 p.m.-12:59 p.m.

1 stop17h 56m

C$ 568

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 4/5

7:40 a.m.-5:26 p.m.

1 stop8h 46m

Lambert-St Louis

Sat 16/5

11:25 a.m.-10:57 p.m.

2 stops12h 32m

C$ 579

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 29/4

12:25 p.m.-11:13 p.m.

2 stops9h 48m

Lambert-St Louis

Sat 2/5

12:23 p.m.-7:40 p.m.

2 stops8h 17m

C$ 591

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 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 October is, on average, the cheapest month to fly to St. Louis from Calgary, with most prices found around C$ 528. If you don’t want to visit St. Louis in October, then you should wait until July to fly from Calgary, when ticket prices are also cheap, with an average price of C$ 571.

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

10h 51m

Direct flights

None
The fastest flight from Calgary to St. Louis takes 10h 51m
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 10h 51m.

  • 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$ 259Free CancellationRating
7.1
10,835 reviews
Search Air Canada flights
WestJetPriceFrom C$ 566Free CancellationRating
7.2
3,300 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.

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