What is the cheapest airline that flies from Calgary to Lambert-St Louis?

American Airlines and Air Canada are the most popular carriers operating from Calgary to Lambert-St Louis

Which airlines fly to St. Louis?

Air Canada, WestJet and United Airlines are the top three most popular airlines that fly to St. Louis from Calgary according to our data. Air Canada is the first choice among our users, with 44% of people opting to fly with this airline when travelling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

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?

As of December 2025, there are 3 operators available to choose from 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.

C$ 185 Cheap Flights from Calgary to St. Louis in 2025/26

Q: What is the typical price of a round-trip flight between Calgary and St. Louis?

Prices are currently low for flights on this route. Typical prices usually range from C$ 645 to C$ 648. The lowest price recently found on this route was C$ 299.

1 adult

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Find the cheapest flights from Calgary to St. Louis

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One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:45 p.m. - 6:51 a.m.

YYC

STL

32h 06m2 stops

8:22 p.m. - 11:43 a.m.

STL

YYC

16h 21m1 stop

C$ 299Multiple Airlines

Sat, 31 Jan - Sat, 7 Feb

7:35 p.m. - 12:08 p.m.

YYC

STL

15h 33m1 stop

8:22 p.m. - 11:43 a.m.

STL

YYC

16h 21m1 stop

C$ 427Multiple Airlines

Sat, 31 Jan - Sat, 7 Feb

6:30 a.m. - 4:45 p.m.

YYC

STL

9h 15m1 stop

5:25 p.m. - 8:54 p.m.

STL

YYC

28h 29m1 stop

C$ 536Delta

Thu, 22 Jan - Mon, 26 Jan

6:30 a.m. - 4:45 p.m.

YYC

STL

9h 15m1 stop

6:10 a.m. - 8:54 p.m.

STL

YYC

15h 44m1 stop

C$ 547Delta

Thu, 22 Jan - Mon, 26 Jan

6:30 a.m. - 8:43 p.m.

YYC

STL

13h 13m2 stops

3:31 p.m. - 8:54 p.m.

STL

YYC

6h 23m1 stop

C$ 602Delta

Thu, 22 Jan - Mon, 26 Jan

6:15 a.m. - 1:16 p.m.

YYC

STL

6h 01m1 stop

9:57 a.m. - 8:59 p.m.

STL

YYC

12h 02m2 stops

C$ 685Air Canada

Thu, 22 Jan - Mon, 26 Jan

6:30 a.m. - 8:43 p.m.

YYC

STL

13h 13m2 stops

9:59 a.m. - 11:02 p.m.

STL

YYC

14h 03m2 stops

C$ 690Delta

Sat, 31 Jan - Sat, 7 Feb

7:00 a.m. - 4:45 p.m.

YYC

STL

8h 45m2 stops

6:10 a.m. - 2:00 p.m.

STL

YYC

8h 50m2 stops

C$ 758WestJet

Thu, 22 Jan - Mon, 26 Jan

7:00 a.m. - 4:45 p.m.

YYC

STL

8h 45m2 stops

6:10 a.m. - 7:15 p.m.

STL

YYC

14h 05m2 stops

C$ 778WestJet

Thu, 22 Jan - Mon, 26 Jan

Delta flights from Calgary to St. Louis

Our best Delta deals on Calgary to St. Louis flight tickets

Delta

22 Jan

YYC6:30 a.m.Calgary

9h 15m

1 stop

STL4:45 p.m.Lambert-St Louis

26 Jan

STL5:25 p.m.Lambert-St Louis

28h 29m

1 stop

YYC8:54 p.m.Calgary

C$ 536

Find similar

Delta

22 Jan

YYC6:30 a.m.Calgary

9h 15m

1 stop

STL4:45 p.m.Lambert-St Louis

26 Jan

STL6:10 a.m.Lambert-St Louis

15h 44m

1 stop

YYC8:54 p.m.Calgary

C$ 547

Find similar

Delta

22 Jan

YYC6:30 a.m.Calgary

13h 13m

2 stops

STL8:43 p.m.Lambert-St Louis

26 Jan

STL3:31 p.m.Lambert-St Louis

6h 23m

1 stop

YYC8:54 p.m.Calgary

C$ 602

Find similar

WestJet flights from Calgary to St. Louis

Our best WestJet deals on Calgary to St. Louis flight tickets

WestJet

22 Jan

YYC7:00 a.m.Calgary

8h 45m

2 stops

STL4:45 p.m.Lambert-St Louis

26 Jan

STL6:10 a.m.Lambert-St Louis

8h 50m

2 stops

YYC2:00 p.m.Calgary

C$ 758

Find similar

WestJet

22 Jan

YYC7:00 a.m.Calgary

8h 45m

2 stops

STL4:45 p.m.Lambert-St Louis

26 Jan

STL6:10 a.m.Lambert-St Louis

14h 05m

2 stops

YYC7:15 p.m.Calgary

C$ 778

Find similar

WestJet

19 Dec

YYC12:15 p.m.Calgary

10h 12m

2 stops

STL11:27 p.m.Lambert-St Louis

2 Jan

STL11:59 a.m.Lambert-St Louis

34h 03m

2 stops

YYC9:02 p.m.Calgary

C$ 933

Find similar

Fly from

Fly to

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 31/1

9:45 p.m.-6:51 a.m.

2 stops32h 06m

Lambert-St Louis

Sat 7/2

8:22 p.m.-11:43 a.m.

1 stop16h 21m

C$ 299

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 31/1

7:35 p.m.-12:08 p.m.

1 stop15h 33m

Lambert-St Louis

Sat 7/2

8:22 p.m.-11:43 a.m.

1 stop16h 21m

C$ 427

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 22/1

6:30 a.m.-4:45 p.m.

1 stop9h 15m

Lambert-St Louis

Mon 26/1

5:25 p.m.-8:54 p.m.

1 stop28h 29m

C$ 536

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 22/1

6:30 a.m.-4:45 p.m.

1 stop9h 15m

Lambert-St Louis

Mon 26/1

6:10 a.m.-8:54 p.m.

1 stop15h 44m

C$ 547

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 22/1

6:30 a.m.-8:43 p.m.

2 stops13h 13m

Lambert-St Louis

Mon 26/1

3:31 p.m.-8:54 p.m.

1 stop6h 23m

C$ 602

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 22/1

6:15 a.m.-1:16 p.m.

1 stop6h 01m

Lambert-St Louis

Mon 26/1

9:57 a.m.-8:59 p.m.

2 stops12h 02m

C$ 685

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 31/1

6:30 a.m.-8:43 p.m.

2 stops13h 13m

Lambert-St Louis

Sat 7/2

9:59 a.m.-11:02 p.m.

2 stops14h 03m

C$ 690

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 22/1

7:00 a.m.-4:45 p.m.

2 stops8h 45m

Lambert-St Louis

Mon 26/1

6:10 a.m.-2:00 p.m.

2 stops8h 50m

C$ 758

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 22/1

7:00 a.m.-4:45 p.m.

2 stops8h 45m

Lambert-St Louis

Mon 26/1

6:10 a.m.-7:15 p.m.

2 stops14h 05m

C$ 778

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sat 24/1

12:30 a.m.-6:51 a.m.

1 stop29h 21m

C$ 185

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first

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

Prices

Airlines

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$ 419. 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$ 569.

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$ 433. The most expensive day to fly to St. Louis is Friday, with ticket prices averaging around C$ 769.

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$ 482. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are C$ 707 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

Fastest flight time	9h 15m
Direct flights	None

The fastest flight from Calgary to St. Louis takes 9h 15m

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 9h 15m.
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?
As of December 2025, there are 3 operators available to choose from 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?
Based on momondo bookings for flights between Calgary and St. Louis, the leading airline is Air Canada, making up 44% of the total bookings. Other popular airlines include WestJet with 38% and United Airlines with 18%.

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 Canada	PriceFrom C$ 412	Free Cancellation	Rating 7.1 10,534 reviews	Search Air Canada flights
United Airlines	PriceFrom C$ 443	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines flights
WestJet	PriceFrom C$ 568	Free Cancellation	Rating 7.2 3,204 reviews	Search WestJet flights

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.