$453 Cheap Flights from St. Louis (STL) to Cagliari (CAG)

View $453 flight on Sun, Aug 16, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $453 for one-way flights and $814 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Tue, Apr 21 - Sat, May 16
STL
St. Louis
CAG
Cagliari
$814 Roundtrip, found 2 days ago
$814
Roundtrip
found 2 days ago
Select Air Canada flight, departing Tue, Apr 21 from St. Louis to Cagliari, returning Sat, May 16, priced at $814 found 2 days ago
Lufthansa
Tue, Apr 21 - Sat, May 16
STL
St. Louis
CAG
Cagliari
$850 Roundtrip, found 2 days ago
$850
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Tue, Apr 21 from St. Louis to Cagliari, returning Sat, May 16, priced at $850 found 2 days ago
Air Canada
Mon, Jul 27 - Sat, Aug 22
STL
St. Louis
CAG
Cagliari
$854 Roundtrip, found 3 days ago
$854
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Jul 27 from St. Louis to Cagliari, returning Sat, Aug 22, priced at $854 found 3 days ago
Air Canada
Mon, Jul 27 - Sat, Aug 22
STL
St. Louis
CAG
Cagliari
$860 Roundtrip, found 3 days ago
$860
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Jul 27 from St. Louis to Cagliari, returning Sat, Aug 22, priced at $860 found 3 days ago
Air Canada
Mon, Jul 27 - Sat, Aug 22
STL
St. Louis
CAG
Cagliari
$873 Roundtrip, found 3 days ago
$873
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Jul 27 from St. Louis to Cagliari, returning Sat, Aug 22, priced at $873 found 3 days ago
Air Canada
Mon, Jul 27 - Sat, Aug 22
STL
St. Louis
CAG
Cagliari
$907 Roundtrip, found 3 days ago
$907
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Jul 27 from St. Louis to Cagliari, returning Sat, Aug 22, priced at $907 found 3 days ago
Air Canada
Mon, Jul 27 - Sat, Aug 22
STL
St. Louis
CAG
Cagliari
$913 Roundtrip, found 3 days ago
$913
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Jul 27 from St. Louis to Cagliari, returning Sat, Aug 22, priced at $913 found 3 days ago
KLM
Thu, Nov 6 - Thu, Nov 13
STL
St. Louis
CAG
Cagliari
$955 Roundtrip, found 5 days ago
$955
Roundtrip
found 5 days ago
Select KLM flight, departing Thu, Nov 6 from St. Louis to Cagliari, returning Thu, Nov 13, priced at $955 found 5 days ago
Delta
Mon, Nov 10 - Thu, Nov 20
STL
St. Louis
CAG
Cagliari
$979 Roundtrip, found 5 days ago
$979
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, Nov 10 from St. Louis to Cagliari, returning Thu, Nov 20, priced at $979 found 5 days ago
Air France
Fri, Nov 7 - Sat, Nov 15
STL
St. Louis
CAG
Cagliari
$1,115 Roundtrip, found 5 days ago
$1,115
Roundtrip
found 5 days ago
Select Air France flight, departing Fri, Nov 7 from St. Louis to Cagliari, returning Sat, Nov 15, priced at $1,115 found 5 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Elmas Airport (CAG) cost?
Get a cheap one-way flight from $453 or cheap return flight from $814 from Lambert-St. Louis Intl. Airport (STL) to Elmas Airport (CAG) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Elmas Airport (CAG)?
The cheapest month to fly from STL to CAG is April, when there's less demand. Off-peak season is often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Elmas Airport (CAG)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest STL to CAG flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Elmas Airport (CAG)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to Elmas Airport (CAG) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to CAG?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be 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 Lambert-St. Louis Intl. Airport (STL) to Elmas Airport (CAG)?
To land at Elmas Airport (CAG) on time, choose a flight that takes off from Lambert-St. Louis Intl. Airport (STL) 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 Lambert-St. Louis Intl. Airport (STL) to Elmas Airport (CAG) last-minute?
Booking your plane ticket from STL to CAG right before your journey is usually more expensive. But if there's some wiggle room with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a STL to CAG flight and hotel package?
Opting for a STL to CAG flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Select from our impressive range of stays and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Elmas Airport (CAG)?
Typically, it's possible to reschedule or cancel your STL to CAG flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Elmas
Airlines serving
Lufthansa
Roundtrip price
$814
Distance
5024 mi

Book with confidence

St. Louis to Cagliari Flights

The cheapest times to fly from St. Louis to Cagliari

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

 

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

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

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 Cagliari in 2025. You can also book with separate airlines for your outbound and return journeys, from $453 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 Cagliari 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 Cagliari 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 Cagliari Flights

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*Available to One Key members.