Nonstop flight route between Fort Sill, Oklahoma, United States and Derby, Western Australia, Australia:

About this route:

A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Derby Airport (DRB), Derby, Western Australia, Australia would travel a Great Circle distance of 9,591 miles (or 15,436 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 Derby 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 Derby 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):

• 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.
• 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.
• The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
• 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.
• Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
• Post Field served as a base for flight training for the Air Service.

Facts about Derby Airport (DRB):

• The closest airport to Derby Airport (DRB) is Broome International Airport (BME), which is located 102 miles (165 kilometers) WSW of DRB.
• Derby Airport (DRB) currently has only 1 runway.
• The furthest airport from Derby Airport (DRB) is Pointe-à-Pitre Le Raizet Airport (PTP), which is nearly antipodal to Derby Airport (meaning Derby Airport is almost on the exact opposite side of the Earth from Pointe-à-Pitre Le Raizet Airport), and is located 12,085 miles (19,449 kilometers) away in Pointe-à-Pitre, Guadeloupe.
• Because of Derby Airport's relatively low elevation of 24 feet, planes can take off or land at Derby 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.