Nonstop flight route between Fort Sill, Oklahoma, United States and Great Falls, Montana, United States:
Departure Airport:
(34°38'58"N by 98°24'7"W)
Arrival Airport:
(47°28'58"N by 111°22'14"W)
Distance from FSI to GTF:
1,111.51 miles (1,788.80 km)
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- About this route
- FSI Airport Information
- GTF Airport Information
- Facts about FSI
- Facts about GTF
- 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 GTF
- List of Nearest Airports to GTF
- Map of Furthest Airports from GTF
- List of Furthest Airports from GTF
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Great Falls International Airport (GTF), Great Falls, Montana, United States would travel a Great Circle distance of 1,112 miles (or 1,789 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 relatively short distance between Henry Post Army Airfield and Great Falls International Airport, the route shown on this map most likely still appears to be a straight line.
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: | GTF / KGTF |
| Airport Names: |
|
| Location: | Great Falls, Montana, United States |
| GPS Coordinates: | 47°28'58"N by 111°22'14"W |
| Area Served: | Great Falls, Montana |
| Operator/Owner: | Great Falls International Airport Authority |
| Airport Type: | Public |
| Elevation: | 3680 feet (1,122 meters) |
| # of Runways: | 3 |
| View all routes: | Routes from GTF |
| More Information: | GTF 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.
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
- Henry Post AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.
- With the sudden end of World War I in November 1918, the future operational status of Post Field was unknown.
- 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.
- 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.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
Facts about Great Falls International Airport (GTF):
- Malmstrom Air Force Base, home of the 341st Missile Wing of the Air Force Global Strike Command, is 10 miles east of GTF, on the east side of Great Falls.
- In addition to being known as "Great Falls International Airport", another name for GTF is "(former Great Falls Army Airfield)".
- In early 2012 Frontier Airlines announced new flights to Great Falls from the Denver hub.
- The furthest airport from Great Falls International Airport (GTF) is Sir Gaëtan Duval Airport (RRG), which is located 10,498 miles (16,896 kilometers) away in Rodrigues Island, Mauritius.
- The closest airport to Great Falls International Airport (GTF) is Malmstrom Air Force Base (GFA), which is located only 9 miles (14 kilometers) E of GTF.
- Great Falls International Airport (GTF) has 3 runways.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 5.72 miles (9.20 km) S | Lawton–Fort Sill Regional Airport (LAW) | Lawton, Oklahoma, United States |     |
| 2 | 28.03 miles (45.12 km) ESE | Halliburton Field (DUC) | Duncan, Oklahoma, United States | |
| 3 | 38.98 miles (62.73 km) WSW | Frederick Regional Airport (FDR) | Frederick, Oklahoma, United States | |
| 4 | 39.53 miles (63.61 km) NE | Chickasha Municipal Airport (CHK) | Chickasha, Oklahoma, United States | |
| 5 | 43.74 miles (70.39 km) WNW | Hobart Regional Airport (HBR) | Hobart, Oklahoma, United States | |
| 6 | 45.95 miles (73.94 km) S | Sheppard Air Force Base (SPS) | Wichita Falls, Texas, United States | |
| 7 | 49.22 miles (79.21 km) W | Altus Air Force Base (LTS) | Altus, Oklahoma, United States | |
| 8 | 53.30 miles (85.78 km) W | Altus/Quartz Mountain Regional Airport (AXS) | Altus, Oklahoma, United States | |
| 9 | 54.76 miles (88.12 km) S | Kickapoo Downtown Airport (KIP) | Wichita Falls, Texas, United States | |
| 10 | 65.69 miles (105.71 km) NW | Clinton-Sherman Industrial Airpark (CSM) | Clinton, Oklahoma, United States | |
| 11 | 66.85 miles (107.58 km) NE | University of Oklahoma Max Westheimer Airport (OUN) | Norman, Oklahoma, United States | |
| 12 | 68.33 miles (109.96 km) NNW | Clinton Regional Airport (CLK) | Clinton, Oklahoma, United States | |
| 13 | 68.51 miles (110.26 km) NE | Will Rogers World Airport (OKC) | Oklahoma City, Oklahoma, United States | |
| 14 | 74.55 miles (119.97 km) NE | Wiley Post Airport (PWA) | Oklahoma City, Oklahoma, United States | |
| 15 | 78.07 miles (125.64 km) NE | Tinker Air Force Base (TIK) | Oklahoma City, Oklahoma, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,920.33 miles (17,574.52 km) SE | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,680.39 miles (17,188.37 km) ESE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 3 | 10,614.31 miles (17,082.03 km) SW | Cocos (Keeling) Island Airport (CCK) | Cocos Islands, Australia | |
| 4 | 10,601.93 miles (17,062.12 km) ESE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 5 | 10,589.08 miles (17,041.43 km) ESE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 6 | 10,532.55 miles (16,950.46 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 7 | 10,512.35 miles (16,917.95 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 8 | 10,492.35 miles (16,885.76 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 9 | 10,478.49 miles (16,863.45 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 10 | 10,478.05 miles (16,862.75 km) W | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 11 | 10,472.77 miles (16,854.25 km) W | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 12 | 10,460.30 miles (16,834.17 km) W | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 13 | 10,458.62 miles (16,831.48 km) W | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 14 | 10,456.31 miles (16,827.76 km) W | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 15 | 10,452.67 miles (16,821.90 km) W | Perth Airport (PER) | Perth, Western Australia, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 8.69 miles (13.99 km) E | Malmstrom Air Force Base (GFA) | Great Falls, Montana, United States | |
| 2 | 67.05 miles (107.90 km) SSW | Helena Regional Airport (HLN) | Helena, Montana, United States | |
| 3 | 76.66 miles (123.37 km) NNW | Shelby Airport (SBX) | Shelby, Montana, United States | |
| 4 | 90.58 miles (145.78 km) NNW | Cut Bank Municipal AirportCut Bank Army Air Field (CTB) | Cut Bank, Montana, United States | |
| 5 | 94.16 miles (151.53 km) ESE | Lewistown Municipal Airport (LWT) | Lewistown, Montana, United States | |
| 6 | 104.37 miles (167.96 km) NE | Havre City-County Airport (HVR) | Havre, Montana, United States | |
| 7 | 118.28 miles (190.35 km) S | Bozeman Yellowstone International Airport (BZN) | Bozeman, Montana, United States | |
| 8 | 118.30 miles (190.39 km) SSW | Bert Mooney Airport (BTM) | Butte, Montana, United States | |
| 9 | 130.77 miles (210.45 km) SSE | Mission Field (LVM) | Livingston, Montana, United States | |
| 10 | 133.54 miles (214.92 km) WSW | Missoula International Airport (MSO) | Missoula, Montana, United States | |
| 11 | 145.38 miles (233.97 km) WNW | Glacier Park International Airport (FCA) | Kalispell, Montana, United States | |
| 12 | 150.36 miles (241.97 km) ESE | Roundup Airport (RPX) | Roundup, Montana, United States | |
| 13 | 162.13 miles (260.92 km) NNW | Lethbridge Airport (YQL) | Lethbridge, Alberta, Canada | |
| 14 | 163.89 miles (263.76 km) SSW | Dillon Airport (DLN) | Dillon, Montana, United States | |
| 15 | 177.14 miles (285.07 km) SE | Billings Logan International Airport (BIL) | Billings, Montana, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,498.43 miles (16,895.54 km) S | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,485.49 miles (16,874.72 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 3 | 10,485.11 miles (16,874.11 km) SSE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 4 | 10,469.70 miles (16,849.31 km) SSE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 5 | 10,458.78 miles (16,831.73 km) SSE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 6 | 10,390.45 miles (16,721.76 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 7 | 10,298.31 miles (16,573.47 km) SE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 8 | 10,275.54 miles (16,536.84 km) SE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 10,189.98 miles (16,399.14 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 10 | 10,184.63 miles (16,390.53 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 11 | 10,172.74 miles (16,371.40 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 10,134.33 miles (16,309.59 km) SE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 13 | 10,124.19 miles (16,293.27 km) SE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 14 | 10,118.92 miles (16,284.79 km) ESE | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 15 | 10,110.12 miles (16,270.62 km) SE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |