Nonstop flight route between Fort Sill, Oklahoma, United States and St. Paul Island, Alaska, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to SNP:
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- About this route
- FSI Airport Information
- SNP Airport Information
- Facts about FSI
- Facts about SNP
- 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 SNP
- List of Nearest Airports to SNP
- Map of Furthest Airports from SNP
- List of Furthest Airports from SNP
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and St. Paul Island Airport (SNP), St. Paul Island, Alaska, United States would travel a Great Circle distance of 3,587 miles (or 5,772 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 St. Paul 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 St. Paul 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: | SNP / PASN |
Airport Name: | St. Paul Island Airport |
Location: | St. Paul Island, Alaska, United States |
GPS Coordinates: | 57°10'1"N by 170°13'14"W |
Area Served: | St. Paul Island, Alaska |
Operator/Owner: | Alaska DOT&PF - Central Region |
Airport Type: | Public |
Elevation: | 63 feet (19 meters) |
# of Runways: | 1 |
View all routes: | Routes from SNP |
More Information: | SNP Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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 is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States.
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
- 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 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 AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
Facts about St. Paul Island Airport (SNP):
- The furthest airport from St. Paul Island Airport (SNP) is Cape Town International Airport (CPT), which is located 10,781 miles (17,351 kilometers) away in Cape Town, South Africa.
- The closest airport to St. Paul Island Airport (SNP) is St. George Airport (STG), which is located 46 miles (74 kilometers) SSE of SNP.
- Because of St. Paul Island Airport's relatively low elevation of 63 feet, planes can take off or land at St. Paul 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.
- St. Paul Island Airport (SNP) currently has only 1 runway.