$454 Cheap Flights from St. Louis (STL) to Carlsbad (CNM)

View $454 flight on Mon, Nov 3, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Carlsbad, NM (CNM-Cavern City Air Terminal)

Cheap Flights from St. Louis to Carlsbad (STL-CNM)

Prices were available within the past 7 days and start at $454 for one-way flights and $1,350 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, Oct 3 - Thu, Oct 9
STL
St. Louis
CNM
Carlsbad
$1,350 Roundtrip, found 1 day ago
$1,350
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Oct 3 from St. Louis to Carlsbad, returning Thu, Oct 9, priced at $1,350 found 1 day ago
Alaska Airlines
Sun, Oct 5 - Thu, Oct 9
STL
St. Louis
CNM
Carlsbad
$1,413 Roundtrip, found 1 day ago
$1,413
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sun, Oct 5 from St. Louis to Carlsbad, returning Thu, Oct 9, priced at $1,413 found 1 day ago
Alaska Airlines
Mon, Sep 29 - Thu, Oct 9
STL
St. Louis
CNM
Carlsbad
$1,425 Roundtrip, found 1 day ago
$1,425
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Mon, Sep 29 from St. Louis to Carlsbad, returning Thu, Oct 9, priced at $1,425 found 1 day ago
Alaska Airlines
Wed, Oct 1 - Thu, Oct 9
STL
St. Louis
CNM
Carlsbad
$1,430 Roundtrip, found 1 day ago
$1,430
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Oct 1 from St. Louis to Carlsbad, returning Thu, Oct 9, priced at $1,430 found 1 day ago
Alaska Airlines
Fri, Oct 3 - Sat, Oct 4
STL
St. Louis
CNM
Carlsbad
$1,439 Roundtrip, found 1 day ago
$1,439
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Oct 3 from St. Louis to Carlsbad, returning Sat, Oct 4, priced at $1,439 found 1 day ago
Alaska Airlines
Fri, Oct 3 - Mon, Oct 6
STL
St. Louis
CNM
Carlsbad
$1,445 Roundtrip, found 1 day ago
$1,445
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Oct 3 from St. Louis to Carlsbad, returning Mon, Oct 6, priced at $1,445 found 1 day ago
Alaska Airlines
Sat, Oct 4 - Sun, Oct 5
STL
St. Louis
CNM
Carlsbad
$1,488 Roundtrip, found 1 day ago
$1,488
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 4 from St. Louis to Carlsbad, returning Sun, Oct 5, priced at $1,488 found 1 day ago
Alaska Airlines
Sun, Oct 5 - Wed, Oct 8
STL
St. Louis
CNM
Carlsbad
$1,491 Roundtrip, found 1 day ago
$1,491
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sun, Oct 5 from St. Louis to Carlsbad, returning Wed, Oct 8, priced at $1,491 found 1 day ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Cavern City Air Terminal Airport (CNM) cost?
Secure a cheap one-way flight from $454 or cheap return flight from $1,350 from Lambert-St. Louis Intl. Airport (STL) to Cavern City Air Terminal Airport (CNM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Cavern City Air Terminal Airport (CNM)?
Planning your getaway for October is a great way to save, as it's the cheapest month for flights between STL and CNM. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Cavern City Air Terminal Airport (CNM)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from STL to CNM. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Cavern City Air Terminal Airport (CNM)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Cavern City Air Terminal Airport (CNM) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to CNM?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Cavern City Air Terminal Airport (CNM)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Cavern City Air Terminal Airport (CNM) route, fly before 3 PM. Departures after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Cavern City Air Terminal Airport (CNM) last-minute?
Booking your flight from STL to CNM just before your getaway is usually more expensive. But if you're flexible with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a STL to CNM flight and hotel package?
You'll typically save money by securing a STL to CNM flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. Once you've selected your preferred accommodations and flights, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Cavern City Air Terminal Airport (CNM)?
You can usually cancel or reschedule your STL to CNM flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Cavern City Air Terminal
Roundtrip price
$1,349
Distance
895 mi

Book with confidence

Book with confidence

St. Louis to Carlsbad Flights

The cheapest times to fly from St. Louis to Carlsbad

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Carlsbad are during the month of October. You can find some of the cheapest flights from St. Louis to Carlsbad with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Carlsbad

Sunday is one of the best days to book for cheap flights from St. Louis to Carlsbad: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Carlsbad

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Carlsbad in 2025. You can also book with separate airlines for your outbound and return journeys, from $454 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Carlsbad flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Carlsbad airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Carlsbad Flights

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Explore a world of travel with Expedia

*Available to One Key members.