Nonstop flight route between Siena, Italy and San Francisco, California, United States:

About this route:

A direct, nonstop flight between Siena-Ampugnano Airport (SAY), Siena, Italy and San Francisco International Airport (SFO), San Francisco, California, United States would travel a Great Circle distance of 6,138 miles (or 9,879 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 Siena-Ampugnano Airport and San Francisco International 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 Siena-Ampugnano Airport and San Francisco International 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 Siena-Ampugnano Airport (SAY):

• During World War II, the facility was known as Malignano Airfield.
• In addition to being known as "Siena-Ampugnano Airport", other names for SAY include "Aeroporto di Siena-Ampugnano" and "Siena-Ampugnano".
• 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.
• 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.

Facts about San Francisco International Airport (SFO):

• On July 14, 2008, SFO was voted Best International Airport in North America for 2008 in the World Airports Survey by Skytrax.
• San Francisco International Airport (SFO) has 4 runways.
• The first international nonstops were ANA/BCPA DC-4s to Vancouver in 1946-47.
• San Francisco International Airport handled 44,477,209 passengers last year.
• Formerly known as the "South Terminal," Terminal 1 has Boarding Area B and Boarding Area C.
• The furthest airport from San Francisco International Airport (SFO) is Tôlanaro Airport (FTU), which is located 11,365 miles (18,290 kilometers) away in Tôlanaro, Madagascar.
• SFO was one of several US airports which operated the Registered Traveler program from April 2007 until funding ended in June 2009, which had allowed travelers to pass through security checkpoints quickly.
• Because of San Francisco International Airport's relatively low elevation of 13 feet, planes can take off or land at San Francisco 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 closest airport to San Francisco International Airport (SFO) is Half Moon Bay AirportHalf Moon Bay Flight Strip (HAF), which is located only 10 miles (16 kilometers) SW of SFO.
• SFO's international terminal was designed by Craig W.