Nonstop flight route between Fort Sill, Oklahoma, United States and Parnaiba, Piaui, Brazil:

About this route:

A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Parnaíba–Prefeito Dr. João Silva Filho International Airport (PHB), Parnaiba, Piaui, Brazil would travel a Great Circle distance of 4,491 miles (or 7,227 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 Henry Post Army Airfield and Parnaíba–Prefeito Dr. João Silva Filho 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 Henry Post Army Airfield and Parnaíba–Prefeito Dr. João Silva Filho 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 Henry Post Army Airfield (FSI):

• Air Service/Corps units assigned to Post Field between 1919 and 1941
• Henry Post Army Airfield is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States.
• With the sudden end of World War I in November 1918, the future operational status of Post Field was unknown.
• The Fort Sill Army Radar Approach Control is the Army's Second busiest Air Traffic Control Facility, providing Radar Approach Control service to Henry Post Army Air Field, Lawton/Fort Sill Regional Airport, Duncan/Haliburton Airport and many smaller airports in the area.
• The closest airport to Henry Post Army Airfield (FSI) is Lawton–Fort Sill Regional Airport (LAW), which is located only 6 miles (9 kilometers) S of FSI.
• Henry Post Army Airfield was the first home of all Army Aviation Training after World War II before moving to Fort Rucker, Alabama in 1954.
• Post Field served as a base for flight training for the Air Service.
• The furthest airport from Henry Post Army Airfield (FSI) is Sir Gaëtan Duval Airport (RRG), which is located 10,920 miles (17,575 kilometers) away in Rodrigues Island, Mauritius.
• Henry Post Army Airfield (FSI) currently has only 1 runway.

Facts about Parnaíba–Prefeito Dr. João Silva Filho International Airport (PHB):

• It is operated by Infraero.
• Parnaíba–Prefeito Dr. João Silva Filho International Airport (PHB) currently has only 1 runway.
• Parnaíba–Prefeito Dr. João Silva Filho International Airport handled 2,922 passengers last year.
• The furthest airport from Parnaíba–Prefeito Dr. João Silva Filho International Airport (PHB) is Frans Kaisiepo Airport (BIK), which is nearly antipodal to Parnaíba–Prefeito Dr. João Silva Filho International Airport (meaning Parnaíba–Prefeito Dr. João Silva Filho International Airport is almost on the exact opposite side of the Earth from Frans Kaisiepo Airport), and is located 12,118 miles (19,501 kilometers) away in Biak, Indonesia.
• In addition to being known as "Parnaíba–Prefeito Dr. João Silva Filho International Airport", another name for PHB is "Aeroporto Internacional de Parnaíba–Prefeito Dr. João Silva Filho".
• The airport is located 8 km from downtown Parnaíba.
• Because of Parnaíba–Prefeito Dr. João Silva Filho International Airport's relatively low elevation of 23 feet, planes can take off or land at Parnaíba–Prefeito Dr. João Silva Filho 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 Parnaíba–Prefeito Dr. João Silva Filho International Airport (PHB) is Barreirinhas Airport (BRB), which is located 75 miles (120 kilometers) W of PHB.