The cheapest times to fly from CAG to STL are

  • January 8th to March 25th (except the week of March 5th)
  • April 16th to June 10th (except the week of May 28th)
  • October 8th to October 21st
  • November 5th to December 9th (except the weeks of November 12th and November 26th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from CAG to STL is early to mid October. Prices can be as high as $2188 for Friday flights during late December, or as low as $755 for Tuesday flights around early to mid October.


When to Fly to St. Louis

Flying from Cagliari (CAG) to St. Louis, MO (STL) will usually cost between $853 to $1538 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid October with an average ticket price of $806. Due to high demand the most expensive time to fly is late December, with an average price of $1554. Planning your trip to low-cost times can easily save you $748 on economy flights and even more on first-class flights. Generally, any price below $999 can be considered a good price for a round-trip CAG to STL flight.

See below for a graph of average weekly prices for the CAG to STL route. All prices are for round-trip tickets in USD.

CAG to STL Flight Prices

Compared to other flights, the CAG to STL flight is priced close to the average and costs more than the average flight leaving from Cagliari. The average price per mile (for a direct flight) is $0.12, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Fridays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $275 (17%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $978. Return trip prices are from the STL to CAG flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from CAG to STL can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 10 hour 1 minutes may not be realistic.


Flight Hacking CAG to STL

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from CAG to STL — but Champion Traveler does!

Hack #1: Boston, MA (CAG > BOS > STL)

  • Price for both tickets: $791
  • Average savings: $209 (20.87%)

See CAG to JFK flights

Hack #2: New York, NY (CAG > JFK > STL)

  • Price for both tickets: $793
  • Average savings: $207 (20.67%)

See CAG to BOS flights

Hack #3: Chicago, IL (CAG > ORD > STL)

  • Price for both tickets: $831
  • Average savings: $169 (16.87%)

See CAG to ORD flights


Flight Questions Answered

Still have questions about flying from CAG to STL? We’ve got answers.

Which airlines fly this route?

You can find 13 major airlines flying this route most often: Air Canada, Air France, Alitalia, American, Austrian, British Airways, Brussels Airlines, Delta, Iberia, KLM, Lufthansa, Tap Air Portugal, United, and potentially more during busy seasons.

How far away is it from St Louis Lambert International Airport to Elmas Airport?

The distance between the two airports is roughly 5023 miles or 8084 kilometers.

How long does it take to fly from CAG to STL?

The real-world flight time for a nonstop CAG to STL flight is about 10 hour 1 minutes.

How many flights go between Cagliari and St. Louis, MO?

It depends on the day of the week and the date, but a typical day might have around 12 available flights from CAG to STL.


Airport Location Info


Departing Airport

Origination codeCAG
Origination airport nameElmas Airport

Return Airport

Destination codeSTL
Destination airport nameSt Louis Lambert International Airport
CitySt. Louis, MO
Countrythe United States


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.