Nonstop flight route between Rome, Italy and Cahokia, Illinois (near St. Louis), United States:

About this route:

A direct, nonstop flight between Ciampino–G. B. Pastine International Airport (CIA), Rome, Italy and St. Louis Downtown Airport (CPS), Cahokia, Illinois (near St. Louis), United States would travel a Great Circle distance of 5,066 miles (or 8,154 kilometers).

A Great Circle is the shortest distance between 2 points on a sphere. Because most world maps are flat (but the Earth is round), the route of the shortest distance between 2 points on the Earth will often appear curved when viewed on a flat map, especially for long distances. If you were to simply draw a straight line on a flat map and measure a very long distance, it would likely be much further than if you were to lay a string between those two points on a globe. Because of the large distance between Ciampino–G. B. Pastine International Airport and St. Louis Downtown Airport, the route shown on this map most likely appears curved because of this reason.

Try it at home! Get a globe and tightly lay a string between Ciampino–G. B. Pastine International Airport and St. Louis Downtown Airport. You'll see that it will travel the same route of the red line on this map!

Departure Airport Information:

Arrival Airport Information:

Facts about Ciampino–G. B. Pastine International Airport (CIA):

• The closest airport to Ciampino–G. B. Pastine International Airport (CIA) is Fiumicino – Leonardo da Vinci International Airport (FCO), which is located only 18 miles (30 kilometers) W of CIA.
• Ciampino–G. B. Pastine International Airport (CIA) currently has only 1 runway.
• In addition to being known as "Ciampino–G. B. Pastine International Airport", other names for CIA include "Rome Ciampino Airport" and "Ciampino–Aeroporto Internazionale G. B. Pastine".
• Ciampino–G. B. Pastine International Airport handled 4,749,251 passengers last year.
• There is no rail transport at Ciampino Airport.
• Because of Ciampino–G. B. Pastine International Airport's relatively low elevation of 427 feet, planes can take off or land at Ciampino–G. B. Pastine International Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
• During World War II, the airport was captured by Allied forces in June 1944, and afterward became a United States Army Air Forces military airfield.
• The furthest airport from Ciampino–G. B. Pastine International Airport (CIA) is Chatham Islands (CHT), which is located 11,958 miles (19,244 kilometers) away in Waitangi, Chatham Islands, New Zealand.

Facts about St. Louis Downtown Airport (CPS):

• St. Louis Downtown Airport (CPS) has 3 runways.
• The closest airport to St. Louis Downtown Airport (CPS) is Lambert–St. Louis International Airport (STL), which is located only 16 miles (27 kilometers) NW of CPS.
• The airport opened in 1929 as Curtiss-Steinberg Airport.
• The airport closed in 1959 and reopened six years later as Bi-State Parks Airport.
• Because of St. Louis Downtown Airport's relatively low elevation of 413 feet, planes can take off or land at St. Louis Downtown Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
• The furthest airport from St. Louis Downtown Airport (CPS) is Margaret River Airport (MGV), which is located 10,998 miles (17,700 kilometers) away in Margaret River, Western Australia, Australia.