Nonstop flight route between Rio Branco, Acre, Brazil and Fort Sill, Oklahoma, United States:

About this route:

A direct, nonstop flight between Rio Branco-Plácido de Castro International Airport (RBR), Rio Branco, Acre, Brazil and Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States would travel a Great Circle distance of 3,667 miles (or 5,901 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 Rio Branco-Plácido de Castro International Airport and Henry Post Army Airfield, 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 Rio Branco-Plácido de Castro International Airport and Henry Post Army Airfield. 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 Rio Branco-Plácido de Castro International Airport (RBR):

• The closest airport to Rio Branco-Plácido de Castro International Airport (RBR) is Captain Aníbal Arab Airport (CIJ), which is located 101 miles (162 kilometers) SW of RBR.
• The airport is located 25 km from downtown Rio Branco.
• The furthest airport from Rio Branco-Plácido de Castro International Airport (RBR) is Cam Ranh International Airport (CXR), which is nearly antipodal to Rio Branco-Plácido de Castro International Airport (meaning Rio Branco-Plácido de Castro International Airport is almost on the exact opposite side of the Earth from Cam Ranh International Airport), and is located 12,192 miles (19,621 kilometers) away in Cam Ranh, Khánh Hòa, Vietnam.
• Rio Branco-Plácido de Castro International Airport (RBR) currently has only 1 runway.
• Because of Rio Branco-Plácido de Castro International Airport's relatively low elevation of 633 feet, planes can take off or land at Rio Branco-Plácido de Castro 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.
• Rio Branco-Plácido de Castro International Airport is the airport serving Rio Branco, Brazil.
• Rio Branco-Plácido de Castro International Airport handled 382,469 passengers last year.
• In addition to being known as "Rio Branco-Plácido de Castro International Airport", another name for RBR is "Aeroporto Internacional de Rio Branco-Plácido de Castro".

Facts about Henry Post Army Airfield (FSI):

• Henry Post AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.
• 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.
• 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 (FSI) currently has only 1 runway.
• With the end of World War I, in October 1919 Post Field was deactivated as an active duty airfield in accordance with sharply reduced military budgets, and a small caretaker unit was assigned to the facility for administrative reasons to support the balloon school/company.
• Air Service/Corps units assigned to Post Field between 1919 and 1941
• 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.
• In 1940 the Artillery decided that the Air Corps had outgrown such mundane chores as artillery spotting, and it was decided that it would take care of itself with its own observation aircraft.