$127 Cheap Flights from St. Louis (STL) to Carlsbad (CLD)

View $127 flight on Thu, Jan 15, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Carlsbad, CA (CLD-McClellan-Palomar)

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

Prices were available within the past 7 days and start at $127 for one-way flights and $253 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Dec 23 - Thu, Jan 1
STL
St. Louis
CLD
Carlsbad
$253 Roundtrip, just found
$253
Roundtrip
just found
Select American Airlines flight, departing Tue, Dec 23 from St. Louis to Carlsbad, returning Thu, Jan 1, priced at $253 just found
American Airlines
Sat, Jan 17 - Mon, Jan 19
STL
St. Louis
CLD
Carlsbad
$300 Roundtrip, found 6 hours ago
$300
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Sat, Jan 17 from St. Louis to Carlsbad, returning Mon, Jan 19, priced at $300 found 6 hours ago
American Airlines
Thu, Jan 15 - Sun, Jan 18
STL
St. Louis
CLD
Carlsbad
$310 Roundtrip, just found
$310
Roundtrip
just found
Select American Airlines flight, departing Thu, Jan 15 from St. Louis to Carlsbad, returning Sun, Jan 18, priced at $310 just found
American Airlines
Thu, Dec 11 - Mon, Dec 15
STL
St. Louis
CLD
Carlsbad
$319 Roundtrip, found 3 days ago
$319
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 11 from St. Louis to Carlsbad, returning Mon, Dec 15, priced at $319 found 3 days ago
American Airlines
Sat, Feb 14 - Tue, Feb 17
STL
St. Louis
CLD
Carlsbad
$321 Roundtrip, found 2 hours ago
$321
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sat, Feb 14 from St. Louis to Carlsbad, returning Tue, Feb 17, priced at $321 found 2 hours ago
American Airlines
Thu, Jan 8 - Sun, Jan 11
STL
St. Louis
CLD
Carlsbad
$325 Roundtrip, found 2 hours ago
$325
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Thu, Jan 8 from St. Louis to Carlsbad, returning Sun, Jan 11, priced at $325 found 2 hours ago
American Airlines
Mon, Dec 15 - Sat, Jan 10
STL
St. Louis
CLD
Carlsbad
$333 Roundtrip, found 3 days ago
$333
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Dec 15 from St. Louis to Carlsbad, returning Sat, Jan 10, priced at $333 found 3 days ago
American Airlines
Tue, Dec 23 - Sat, Dec 27
STL
St. Louis
CLD
Carlsbad
$339 Roundtrip, found 1 day ago
$339
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Dec 23 from St. Louis to Carlsbad, returning Sat, Dec 27, priced at $339 found 1 day ago
American Airlines
Tue, Dec 23 - Thu, Jan 1
STL
St. Louis
CLD
Carlsbad
$343 Roundtrip, just found
$343
Roundtrip
just found
Select American Airlines flight, departing Tue, Dec 23 from St. Louis to Carlsbad, returning Thu, Jan 1, priced at $343 just found
United
Tue, May 5 - Tue, May 12
STL
St. Louis
CLD
Carlsbad
$558 Roundtrip, found 2 days ago
$558
Roundtrip
found 2 days ago
Select United flight, departing Tue, May 5 from St. Louis to Carlsbad, returning Tue, May 12, priced at $558 found 2 days ago

Alternative airports near Carlsbad

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to San Diego Intl. SAN. Cheapest option available. Average driving time to city center is 38 minutes. Flights from $337
SAN
San Diego Intl.
Cheapest
Average driving time to city center38 min
Flights from $337

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to McClellan-Palomar Airport (CLD) cost?
Grab a cheap one-way flight from $127 or cheap return flight from $253 from Lambert-St. Louis Intl. Airport (STL) to McClellan-Palomar Airport (CLD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to McClellan-Palomar Airport (CLD)?
The cheapest month to fly from STL to CLD is December, when demand is low. Off-peak months are usually when better flight deals are available between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to McClellan-Palomar Airport (CLD)?
To find the cheapest airline that'll fly you from STL to CLD, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to McClellan-Palomar Airport (CLD)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to McClellan-Palomar Airport (CLD) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to CLD?
Typically you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the season, carrier and other factors.*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 McClellan-Palomar Airport (CLD)?
Choose a flight from Lambert-St. Louis Intl. Airport (STL) to McClellan-Palomar Airport (CLD) that leaves before 3 PM to reduce the risk of cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**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.
What airports do you fly into for Carlsbad from Lambert-St. Louis Intl. Airport (STL)?
Compare your flight options from Lambert-St. Louis Intl. Airport (STL) to San Diego Intl. Airport (SAN). This is the only airport in Carlsbad you can touch down at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to McClellan-Palomar Airport (CLD) last-minute?
Holding off until right before your break to book a ticket from STL to CLD generally means paying more. While you might find some last-minute deals, they aren't always guaranteed. Allow some flexibility in your schedule for a better chance of getting a bargain.
Is it cheaper to book a STL to CLD flight and hotel package?
You can save money by booking a STL to CLD flight and hotel package compared to booking separately. In fact, you 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 adding extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to McClellan-Palomar Airport (CLD)?
If you booked your STL to CLD flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
McClellan-Palomar
Airlines serving
American Airlines
Roundtrip price
$252
Distance
1548 mi

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 December. 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 $127 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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