Nonstop flight route between Fort Sill, Oklahoma, United States and Hilo, Hawaii, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to ITO:
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- About this route
- FSI Airport Information
- ITO Airport Information
- Facts about FSI
- Facts about ITO
- 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 ITO
- List of Nearest Airports to ITO
- Map of Furthest Airports from ITO
- List of Furthest Airports from ITO
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Hilo International Airport (ITO), Hilo, Hawaii, United States would travel a Great Circle distance of 3,583 miles (or 5,766 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 Hilo 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 Hilo 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: | ITO / PHTO |
Airport Name: | Hilo International Airport |
Location: | Hilo, Hawaii, United States |
GPS Coordinates: | 19°43'13"N by 155°2'53"W |
Operator/Owner: | Hawaiʻi State Department of Transportation |
Airport Type: | Public |
Elevation: | 38 feet (12 meters) |
# of Runways: | 2 |
View all routes: | Routes from ITO |
More Information: | ITO Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- Post Field served as a base for flight training for the Air Service.
- 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.
- By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
- 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.
- 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.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- 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.
Facts about Hilo International Airport (ITO):
- During martial law in the territory following the attack on Pearl Harbor, all airports in the Hawaiian Islands came under the control of the U.S.
- Because of Hilo International Airport's relatively low elevation of 38 feet, planes can take off or land at Hilo 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.
- Hilo International Airport handled 1,279,342 passengers last year.
- In May 1989, the state Legislature renamed General Lyman Field to "Hilo International Airport".
- Hilo International Airport has two runways.
- Hilo International Airport (ITO) has 2 runways.
- The closest airport to Hilo International Airport (ITO) is Pōhakuloa Training Area (BSF), which is located 44 miles (71 kilometers) W of ITO.
- The primary reason for Hilo International Airport's relatively stagnant passenger count is the lack of tourism within the airport's service area, which includes the districts of Hilo and Puna, as well as portions of the districts of Hāmākua and Kaʻū, relative to the Kona district and Kohala district and the islands of Kauaʻi and Maui.
- The furthest airport from Hilo International Airport (ITO) is Maun Airport (MUB), which is nearly antipodal to Hilo International Airport (meaning Hilo International Airport is almost on the exact opposite side of the Earth from Maun Airport), and is located 12,336 miles (19,854 kilometers) away in Maun, Botswana.
- In the wake of ATA's bankruptcy, the Hawaii Tribune-Herald reported an undisclosed major U.S.