$537 Cheap Flights from Cagliari (CAG) to St. Louis (STL)

View $537 flight on Fri, May 22, 2026Opens in a new window

Popular airlines from Elmas Airport (CAG) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Cagliari to St. Louis (CAG-STL)

Prices were available within the past 7 days and start at $537 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Elmas Airport (CAG) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight from $537 or cheap return flight from Elmas Airport (CAG) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Elmas Airport (CAG) to Lambert-St. Louis Intl. Airport (STL)?
Planning your trip for is a great way to save, as it's the cheapest month for flights between CAG and STL. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Elmas Airport (CAG) to Lambert-St. Louis Intl. Airport (STL)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll take you from CAG to STL. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Elmas Airport (CAG) to Lambert-St. Louis Intl. Airport (STL)?
You'll need to hop on a flight with a layover if you're traveling from Elmas Airport (CAG) to Lambert-St. Louis Intl. Airport (STL). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from CAG to STL?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change 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 Elmas Airport (CAG) to Lambert-St. Louis Intl. Airport (STL)?
To land at Lambert-St. Louis Intl. Airport (STL) on schedule, book a flight that takes off from Elmas Airport (CAG) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Elmas Airport (CAG) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your flight from CAG to STL just before your journey is usually more expensive. But if you're flexible with your itinerary, you could snag a cheap last-minute fare.
Is it cheaper to book a CAG to STL flight and hotel package?
You'll typically save money by securing a CAG to STL flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. After selecting your ideal accommodations and flights, consider adding extras including car rentals, activities and tours.
Can I cancel or change the date of my flight from Elmas Airport (CAG) to Lambert-St. Louis Intl. Airport (STL)?
If you booked your CAG to STL flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Travel information

Origin airport
Elmas
Destination airport
Lambert-St. Louis Intl.
Distance
5024 mi

Book with confidence

Book with confidence

Cagliari to St. Louis Flights

The cheapest times to fly from Cagliari to St. Louis

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 Cagliari to St. Louis are during the month of . You can find some of the cheapest flights from Cagliari to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Cagliari to St. Louis: 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 Cagliari to St. Louis

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 Cagliari to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $537 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 Cagliari to St. Louis 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 Cagliari to St. Louis 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.

 

Cagliari to St. Louis Flights

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*Available to One Key members.