Nonstop flight route between Fort Sill, Oklahoma, United States and Saipan Island, Northern Mariana Islands:
Departure Airport:

Arrival Airport:

Distance from FSI to SPN:
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- About this route
- FSI Airport Information
- SPN Airport Information
- Facts about FSI
- Facts about SPN
- Map of Nearest Airports to FSI
- List of Nearest Airports to FSI
- Map of Furthest Airports from FSI
- List of Furthest Airports from FSI
- Map of Nearest Airports to SPN
- List of Nearest Airports to SPN
- Map of Furthest Airports from SPN
- List of Furthest Airports from SPN
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Saipan International Airport (SPN), Saipan Island, Northern Mariana Islands would travel a Great Circle distance of 7,008 miles (or 11,279 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 Saipan 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 Saipan International Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | FSI / KFSI |
Airport Name: | Henry Post Army Airfield |
Location: | Fort Sill, Oklahoma, United States |
GPS Coordinates: | 34°38'58"N by 98°24'7"W |
Operator/Owner: | U.S. Army ATCA-ASO |
Airport Type: | Military |
Elevation: | 1189 feet (362 meters) |
# of Runways: | 1 |
View all routes: | Routes from FSI |
More Information: | FSI Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | SPN / PGSN |
Airport Names: |
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Location: | Saipan Island, Northern Mariana Islands |
GPS Coordinates: | 15°7'8"N by 145°43'45"E |
Operator/Owner: | Commonwealth Ports Authority |
Airport Type: | Public |
Elevation: | 215 feet (66 meters) |
# of Runways: | 1 |
View all routes: | Routes from SPN |
More Information: | SPN Maps & Info |
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.
- After returning from combat duty in France, a cadre of the 135th Aero Squadron ) was assigned to Post Field as an observation squadron, supplying aircraft for the United States Army Field Artillery School at Fort Sill and supported Army units at Fort Leavenworth, Kansas.
- 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.
- 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.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.
- The first Army aviation at Fort Sill began on 26 July 1915 when eight Curtiss JN-3 airplanes of the 1st Aero Squadron arrived from Rockwell Field, California.
- The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
Facts about Saipan International Airport (SPN):
- The airfield was liberated by the United States Army 27th Infantry Division on June 18, 1944 during the Battle of Saipan.
- In 2005, Japan Airlines suspended its services from Japan to SPN.
- Because of Saipan International Airport's relatively low elevation of 215 feet, planes can take off or land at Saipan 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.
- In addition to being known as "Saipan International Airport", other names for SPN include "Francisco C. Ada Airport" and "GSN".
- After several months of disappointing high level bombing attacks from Isely, General Curtis LeMay, Commander of Twentieth Air Force issued a new directive that the high-altitude, daylight attacks be phased out and replaced by low-altitude, high-intensity incendiary raids at nighttime, being followed up with high explosive bombs once the targets were set ablaze.
- Saipan International Airport (SPN) currently has only 1 runway.
- The closest airport to Saipan International Airport (SPN) is Tinian International Airport (TIQ), which is located only 11 miles (18 kilometers) SW of SPN.
- The furthest airport from Saipan International Airport (SPN) is Salvador-Deputado Luís Eduardo Magalhães International Airport (2 de Julho) (SSA), which is nearly antipodal to Saipan International Airport (meaning Saipan International Airport is almost on the exact opposite side of the Earth from Salvador-Deputado Luís Eduardo Magalhães International Airport (2 de Julho)), and is located 12,125 miles (19,514 kilometers) away in Salvador, Bahia, Brazil.