Nonstop flight route between Fort Sill, Oklahoma, United States and Canton Island, Kiribati:
Departure Airport:

Arrival Airport:

Distance from FSI to CIS:
Share this route:
Jump to:
- About this route
- FSI Airport Information
- CIS Airport Information
- Facts about FSI
- Facts about CIS
- 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 CIS
- List of Nearest Airports to CIS
- Map of Furthest Airports from CIS
- List of Furthest Airports from CIS
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Canton Island Airport (CIS), Canton Island, Kiribati would travel a Great Circle distance of 5,386 miles (or 8,669 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 Canton Island 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 Canton Island 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: | CIS / PCIS |
Airport Name: | Canton Island Airport |
Location: | Canton Island, Kiribati |
GPS Coordinates: | 2°46'9"S by 171°42'19"W |
Elevation: | 9 feet (3 meters) |
# of Runways: | 1 |
View all routes: | Routes from CIS |
More Information: | CIS Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
- 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 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 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.
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
Facts about Canton Island Airport (CIS):
- The furthest airport from Canton Island Airport (CIS) is Malabo International Airport (SSG), which is nearly antipodal to Canton Island Airport (meaning Canton Island Airport is almost on the exact opposite side of the Earth from Malabo International Airport), and is located 12,363 miles (19,896 kilometers) away in Malabo, Equatorial Guinea.
- Because of Canton Island Airport's relatively low elevation of 9 feet, planes can take off or land at Canton Island 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 Pan American pioneered central air route, Hawaii to the Philippines and Asia by way of stations at Midway, Wake and Guam passed through the Japanese controlled islands with serious concerns about its safety growing in 1941 even as the Army had reinforced the Philippines with a flight of B-17 bombers by way of Midway, Wake and Port Moresby in September.
- The closest airport to Canton Island Airport (CIS) is Funafuti International Airport (FUN), which is located 741 miles (1,193 kilometers) WSW of CIS.
- Though Kanton Island was never physically invaded by Japanese forces, the airfield was bombarded on 1 November 1943 by the Japanese submarine I-36.
- Canton Island Airport (CIS) currently has only 1 runway.