Nonstop flight route between St. Louis, Missouri, United States and Siena, Italy:

About this route:

A direct, nonstop flight between Lambert–St. Louis International Airport (STL), St. Louis, Missouri, United States and Siena-Ampugnano Airport (SAY), Siena, Italy would travel a Great Circle distance of 4,952 miles (or 7,969 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 Lambert–St. Louis International Airport and Siena-Ampugnano 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 Lambert–St. Louis International Airport and Siena-Ampugnano 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 Lambert–St. Louis International Airport (STL):

• Lambert again grew in importance for TWA after the airline declared bankruptcy in 1993 and moved its headquarters to St.
• During the war, the airport became a manufacturing base for McDonnell Aircraft and Curtiss-Wright.
• Lambert–St. Louis International Airport (STL) has 4 runways.
• The closest airport to Lambert–St. Louis International Airport (STL) is St. Louis Downtown Airport (CPS), which is located only 16 miles (27 kilometers) SE of STL.
• In May 2013, Moody's raised its rating on Lambert Airport's bonds to A3-stable outlook from Baa1 with a stable outlook.
• In 1925, the airport became home to Naval Air Station St.
• Lambert's passenger traffic slowly rebounded from American Airlines' cuts of November 2003, increasing from a low of 13.4 million passengers enplaned in 2004, to 15.4 million by 2007, and increase of almost 15 percent.
• Because of Lambert–St. Louis International Airport's relatively low elevation of 605 feet, planes can take off or land at Lambert–St. Louis 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.
• The furthest airport from Lambert–St. Louis International Airport (STL) is Margaret River Airport (MGV), which is located 10,986 miles (17,681 kilometers) away in Margaret River, Western Australia, Australia.

Facts about Siena-Ampugnano Airport (SAY):

• The site has recently been proposed for a new international airport capable of handling 4 million passengers a year by 2020.
• The closest airport to Siena-Ampugnano Airport (SAY) is Grosseto Airport (GRS), which is located 36 miles (57 kilometers) SSW of SAY.
• Siena-Ampugnano Airport handled 3,745 passengers last year.
• Siena-Ampugnano Airport (SAY) currently has only 1 runway.
• Because of Siena-Ampugnano Airport's relatively low elevation of 634 feet, planes can take off or land at Siena-Ampugnano 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 Siena-Ampugnano Airport (SAY) is Chatham Islands (CHT), which is nearly antipodal to Siena-Ampugnano Airport (meaning Siena-Ampugnano Airport is almost on the exact opposite side of the Earth from Chatham Islands), and is located 12,049 miles (19,391 kilometers) away in Waitangi, Chatham Islands, New Zealand.
• In addition to being known as "Siena-Ampugnano Airport", other names for SAY include "Aeroporto di Siena-Ampugnano" and "Siena-Ampugnano".