About this route:

A direct, nonstop flight between Helena Regional Airport (HLN), Helena, Montana, United States and Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States would travel a Great Circle distance of 1,088 miles (or 1,750 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 Helena Regional Airport and Henry Post Army Airfield, the route shown on this map most likely still appears to be a straight line.

Departure Airport Information:

IATA / ICAO Codes: HLN / KHLN
Airport Names:
  1. Helena Regional Airport
  2. Helena Army Airfield
Location: Helena, Montana, United States
GPS Coordinates: 46°36'24"N by 111°58'58"W
Area Served: Helena, Montana
Operator/Owner: Helena Regional Airport Authority
Airport Type: Public
Elevation: 3877 feet (1,182 meters)
# of Runways: 3
View all routes: Routes from HLN
More Information: HLN Maps & Info

Arrival 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

Facts about Helena Regional Airport (HLN):

  • The closest airport to Helena Regional Airport (HLN) is Bert Mooney Airport (BTM), which is located 51 miles (83 kilometers) SSW of HLN.
  • In addition to being known as "Helena Regional Airport", another name for HLN is "Helena Army Airfield".
  • Helena Regional Airport covers 1,224 acres at an elevation of 3,877 feet.
  • The furthest airport from Helena Regional Airport (HLN) is Sir Gaëtan Duval Airport (RRG), which is located 10,563 miles (17,000 kilometers) away in Rodrigues Island, Mauritius.
  • Helena Regional Airport (HLN) has 3 runways.

Facts about Henry Post Army Airfield (FSI):

  • Post Field served as a base for flight training for the Air Service.
  • Henry Post AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.
  • 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 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.
  • 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 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.

Map of Nearest Airports to Helena Regional Airport:

List of Nearest Airports to Helena Regional Airport:

RankDistance & DirectionAirport Name & IATA CodeAirport LocationFurther Actions
151.31 miles (82.58 km) SSWBert Mooney Airport (BTM)Butte, Montana, United StatesView Bert Mooney Airport on a map Set BTM as origin Airport Set BTM as destination Airport Get more information about Bert Mooney Airport
267.05 miles (107.90 km) NNEGreat Falls International Airport (GTF)Great Falls, Montana, United StatesView Great Falls International Airport on a map Set GTF as origin Airport Set GTF as destination Airport Get more information about Great Falls International Airport
369.72 miles (112.21 km) SEBozeman Yellowstone International Airport (BZN)Bozeman, Montana, United StatesView Bozeman Yellowstone International Airport on a map Set BZN as origin Airport Set BZN as destination Airport Get more information about Bozeman Yellowstone International Airport
472.47 miles (116.63 km) NNEMalmstrom Air Force Base (GFA)Great Falls, Montana, United StatesView Malmstrom Air Force Base on a map Set GFA as origin Airport Set GFA as destination Airport Get more information about Malmstrom Air Force Base
596.56 miles (155.40 km) SEMission Field (LVM)Livingston, Montana, United StatesView Mission Field on a map Set LVM as origin Airport Set LVM as destination Airport Get more information about Mission Field
697.30 miles (156.59 km) SSWDillon Airport (DLN)Dillon, Montana, United StatesView Dillon Airport on a map Set DLN as origin Airport Set DLN as destination Airport Get more information about Dillon Airport
7102.03 miles (164.20 km) WNWMissoula International Airport (MSO)Missoula, Montana, United StatesView Missoula International Airport on a map Set MSO as origin Airport Set MSO as destination Airport Get more information about Missoula International Airport
8122.80 miles (197.63 km) ENELewistown Municipal Airport (LWT)Lewistown, Montana, United StatesView Lewistown Municipal Airport on a map Set LWT as origin Airport Set LWT as destination Airport Get more information about Lewistown Municipal Airport
9133.72 miles (215.20 km) NShelby Airport (SBX)Shelby, Montana, United StatesView Shelby Airport on a map Set SBX as origin Airport Set SBX as destination Airport Get more information about Shelby Airport
10137.25 miles (220.89 km) SWLemhi County Airport (SMN)Salmon, Idaho, United StatesView Lemhi County Airport on a map Set SMN as origin Airport Set SMN as destination Airport Get more information about Lemhi County Airport
11138.97 miles (223.65 km) SSEYellowstone Airport (WYS)West Yellowstone, Montana, United StatesView Yellowstone Airport on a map Set WYS as origin Airport Set WYS as destination Airport Get more information about Yellowstone Airport
12139.51 miles (224.52 km) NCut Bank Municipal AirportCut Bank Army Air Field (CTB)Cut Bank, Montana, United StatesView Cut Bank Municipal AirportCut Bank Army Air Field on a map Set CTB as origin Airport Set CTB as destination Airport Get more information about Cut Bank Municipal AirportCut Bank Army Air Field
13158.54 miles (255.14 km) NWGlacier Park International Airport (FCA)Kalispell, Montana, United StatesView Glacier Park International Airport on a map Set FCA as origin Airport Set FCA as destination Airport Get more information about Glacier Park International Airport
14163.70 miles (263.45 km) ERoundup Airport (RPX)Roundup, Montana, United StatesView Roundup Airport on a map Set RPX as origin Airport Set RPX as destination Airport Get more information about Roundup Airport
15169.14 miles (272.20 km) NEHavre City-County Airport (HVR)Havre, Montana, United StatesView Havre City-County Airport on a map Set HVR as origin Airport Set HVR as destination Airport Get more information about Havre City-County Airport

Map of Furthest Airports from Helena Regional Airport:

List of Furthest Airports from Helena Regional Airport:

RankDistance & DirectionAirport Name & IATA CodeAirport LocationFurther Actions
110,563.08 miles (16,999.59 km) SSir Gaëtan Duval Airport (RRG)Rodrigues Island, MauritiusView Sir Gaëtan Duval Airport on a map Set RRG as origin Airport Set RRG as destination Airport Get more information about Sir Gaëtan Duval Airport
210,552.15 miles (16,981.99 km) SSEPierrefonds Airport (ZSE)Saint-Pierre, RéunionView Pierrefonds Airport on a map Set ZSE as origin Airport Set ZSE as destination Airport Get more information about Pierrefonds Airport
310,548.64 miles (16,976.36 km) SETôlanaro Airport (FTU)Tôlanaro, MadagascarView Tôlanaro Airport on a map Set FTU as origin Airport Set FTU as destination Airport Get more information about Tôlanaro Airport
410,536.59 miles (16,956.96 km) SSESir Seewoosagur Ramgoolam International Airport (MRU)Plaisance, MauritiusView Sir Seewoosagur Ramgoolam International Airport on a map Set MRU as origin Airport Set MRU as destination Airport Get more information about Sir Seewoosagur Ramgoolam International Airport
510,525.82 miles (16,939.62 km) SSERoland Garros Airport (RUN)St Denis, Réunion, FranceView Roland Garros Airport on a map Set RUN as origin Airport Set RUN as destination Airport Get more information about Roland Garros Airport
610,452.26 miles (16,821.24 km) SEAmpanihy Airport (AMP)Ampanihy, MadagascarView Ampanihy Airport on a map Set AMP as origin Airport Set AMP as destination Airport Get more information about Ampanihy Airport
710,363.52 miles (16,678.43 km) SEMananjary Airport (MNJ)Mananjary, MadagascarView Mananjary Airport on a map Set MNJ as origin Airport Set MNJ as destination Airport Get more information about Mananjary Airport
810,340.10 miles (16,640.74 km) SEFianarantsoa Airport (WFI)Fianarantsoa, MadagascarView Fianarantsoa Airport on a map Set WFI as origin Airport Set WFI as destination Airport Get more information about Fianarantsoa Airport
910,252.07 miles (16,499.06 km) SEAndavadoaka Airport (DVD)Andavadoaka, Toliara province, Atsimo-Andrefana region, MadagascarView Andavadoaka Airport on a map Set DVD as origin Airport Set DVD as destination Airport Get more information about Andavadoaka Airport
1010,247.66 miles (16,491.97 km) SEManja Airport (MJA)Manja, Menabe, MadagascarView Manja Airport on a map Set MJA as origin Airport Set MJA as destination Airport Get more information about Manja Airport
1110,235.05 miles (16,471.68 km) SEMorombe Airport (MXM)Morombe, MadagascarView Morombe Airport on a map Set MXM as origin Airport Set MXM as destination Airport Get more information about Morombe Airport
1210,200.52 miles (16,416.11 km) SEToamasino Airport (TMM)Toamasina, MadagascarView Toamasino Airport on a map Set TMM as origin Airport Set TMM as destination Airport Get more information about Toamasino Airport
1310,189.58 miles (16,398.51 km) SEIvato International Airport (TNR)Antananarivo, MadagascarView Ivato International Airport on a map Set TNR as origin Airport Set TNR as destination Airport Get more information about Ivato International Airport
1410,174.40 miles (16,374.07 km) SEMiandrivazo Airport (ZVA)Miandrivazo, MadagascarView Miandrivazo Airport on a map Set ZVA as origin Airport Set ZVA as destination Airport Get more information about Miandrivazo Airport
1510,162.80 miles (16,355.40 km) ESEMargate Airport (MGH)Margate, KwaZulu-Natal, South AfricaView Margate Airport on a map Set MGH as origin Airport Set MGH as destination Airport Get more information about Margate Airport

Map of Nearest Airports to Henry Post Army Airfield:

List of Nearest Airports to Henry Post Army Airfield:

RankDistance & DirectionAirport Name & IATA CodeAirport LocationFurther Actions
15.72 miles (9.20 km) SLawton–Fort Sill Regional Airport (LAW)Lawton, Oklahoma, United StatesView Lawton–Fort Sill Regional Airport on a map Set LAW as destination Airport Set LAW as destination Airport Get more information about Lawton–Fort Sill Regional Airport
228.03 miles (45.12 km) ESEHalliburton Field (DUC)Duncan, Oklahoma, United StatesView Halliburton Field on a map Set DUC as destination Airport Set DUC as destination Airport Get more information about Halliburton Field
338.98 miles (62.73 km) WSWFrederick Regional Airport (FDR)Frederick, Oklahoma, United StatesView Frederick Regional Airport on a map Set FDR as destination Airport Set FDR as destination Airport Get more information about Frederick Regional Airport
439.53 miles (63.61 km) NEChickasha Municipal Airport (CHK)Chickasha, Oklahoma, United StatesView Chickasha Municipal Airport on a map Set CHK as destination Airport Set CHK as destination Airport Get more information about Chickasha Municipal Airport
543.74 miles (70.39 km) WNWHobart Regional Airport (HBR)Hobart, Oklahoma, United StatesView Hobart Regional Airport on a map Set HBR as destination Airport Set HBR as destination Airport Get more information about Hobart Regional Airport
645.95 miles (73.94 km) SSheppard Air Force Base (SPS)Wichita Falls, Texas, United StatesView Sheppard Air Force Base on a map Set SPS as destination Airport Set SPS as destination Airport Get more information about Sheppard Air Force Base
749.22 miles (79.21 km) WAltus Air Force Base (LTS)Altus, Oklahoma, United StatesView Altus Air Force Base on a map Set LTS as destination Airport Set LTS as destination Airport Get more information about Altus Air Force Base
853.30 miles (85.78 km) WAltus/Quartz Mountain Regional Airport (AXS)Altus, Oklahoma, United StatesView Altus/Quartz Mountain Regional Airport on a map Set AXS as destination Airport Set AXS as destination Airport Get more information about Altus/Quartz Mountain Regional Airport
954.76 miles (88.12 km) SKickapoo Downtown Airport (KIP)Wichita Falls, Texas, United StatesView Kickapoo Downtown Airport on a map Set KIP as destination Airport Set KIP as destination Airport Get more information about Kickapoo Downtown Airport
1065.69 miles (105.71 km) NWClinton-Sherman Industrial Airpark (CSM)Clinton, Oklahoma, United StatesView Clinton-Sherman Industrial Airpark on a map Set CSM as destination Airport Set CSM as destination Airport Get more information about Clinton-Sherman Industrial Airpark
1166.85 miles (107.58 km) NEUniversity of Oklahoma Max Westheimer Airport (OUN)Norman, Oklahoma, United StatesView University of Oklahoma Max Westheimer Airport on a map Set OUN as destination Airport Set OUN as destination Airport Get more information about University of Oklahoma Max Westheimer Airport
1268.33 miles (109.96 km) NNWClinton Regional Airport (CLK)Clinton, Oklahoma, United StatesView Clinton Regional Airport on a map Set CLK as destination Airport Set CLK as destination Airport Get more information about Clinton Regional Airport
1368.51 miles (110.26 km) NEWill Rogers World Airport (OKC)Oklahoma City, Oklahoma, United StatesView Will Rogers World Airport on a map Set OKC as destination Airport Set OKC as destination Airport Get more information about Will Rogers World Airport
1474.55 miles (119.97 km) NEWiley Post Airport (PWA)Oklahoma City, Oklahoma, United StatesView Wiley Post Airport on a map Set PWA as destination Airport Set PWA as destination Airport Get more information about Wiley Post Airport
1578.07 miles (125.64 km) NETinker Air Force Base (TIK)Oklahoma City, Oklahoma, United StatesView Tinker Air Force Base on a map Set TIK as destination Airport Set TIK as destination Airport Get more information about Tinker Air Force Base

Map of Furthest Airports from Henry Post Army Airfield:

List of Furthest Airports from Henry Post Army Airfield:

RankDistance & DirectionAirport Name & IATA CodeAirport LocationFurther Actions
110,920.33 miles (17,574.52 km) SESir Gaëtan Duval Airport (RRG)Rodrigues Island, MauritiusView Sir Gaëtan Duval Airport on a map Set RRG as destination Airport Set RRG as destination Airport Get more information about Sir Gaëtan Duval Airport
210,680.39 miles (17,188.37 km) ESESir Seewoosagur Ramgoolam International Airport (MRU)Plaisance, MauritiusView Sir Seewoosagur Ramgoolam International Airport on a map Set MRU as destination Airport Set MRU as destination Airport Get more information about Sir Seewoosagur Ramgoolam International Airport
310,614.31 miles (17,082.03 km) SWCocos (Keeling) Island Airport (CCK)Cocos Islands, AustraliaView Cocos (Keeling) Island Airport on a map Set CCK as destination Airport Set CCK as destination Airport Get more information about Cocos (Keeling) Island Airport
410,601.93 miles (17,062.12 km) ESEPierrefonds Airport (ZSE)Saint-Pierre, RéunionView Pierrefonds Airport on a map Set ZSE as destination Airport Set ZSE as destination Airport Get more information about Pierrefonds Airport
510,589.08 miles (17,041.43 km) ESERoland Garros Airport (RUN)St Denis, Réunion, FranceView Roland Garros Airport on a map Set RUN as destination Airport Set RUN as destination Airport Get more information about Roland Garros Airport
610,532.55 miles (16,950.46 km) WMargaret River Airport (MGV)Margaret River, Western Australia, AustraliaView Margaret River Airport on a map Set MGV as destination Airport Set MGV as destination Airport Get more information about Margaret River Airport
710,512.35 miles (16,917.95 km) WBusselton Regional Airport (BQB)Busselton, Western Australia, AustraliaView Busselton Regional Airport on a map Set BQB as destination Airport Set BQB as destination Airport Get more information about Busselton Regional Airport
810,492.35 miles (16,885.76 km) WBunbury Airport (BUY)Bunbury, Western Australia, AustraliaView Bunbury Airport on a map Set BUY as destination Airport Set BUY as destination Airport Get more information about Bunbury Airport
910,478.49 miles (16,863.45 km) WManjimup Airport (MJP)Manjimup, Western Australia, AustraliaView Manjimup Airport on a map Set MJP as destination Airport Set MJP as destination Airport Get more information about Manjimup Airport
1010,478.05 miles (16,862.75 km) WRottnest Airport (RTS)Rottnest Island, Western Australia, AustraliaView Rottnest Airport on a map Set RTS as destination Airport Set RTS as destination Airport Get more information about Rottnest Airport
1110,472.77 miles (16,854.25 km) WJurien Bay Airport (JUR)Jurien Bay, Western Australia, AustraliaView Jurien Bay Airport on a map Set JUR as destination Airport Set JUR as destination Airport Get more information about Jurien Bay Airport
1210,460.30 miles (16,834.17 km) WJandakot Airport (JAD)Jandakot, Western Australia, AustraliaView Jandakot Airport on a map Set JAD as destination Airport Set JAD as destination Airport Get more information about Jandakot Airport
1310,458.62 miles (16,831.48 km) WGeraldton Airport (GET)Geraldton, Western Australia, AustraliaView Geraldton Airport on a map Set GET as destination Airport Set GET as destination Airport Get more information about Geraldton Airport
1410,456.31 miles (16,827.76 km) WKalbarri Airport (KAX)Kalbarri, Western Australia, AustraliaView Kalbarri Airport on a map Set KAX as destination Airport Set KAX as destination Airport Get more information about Kalbarri Airport
1510,452.67 miles (16,821.90 km) WPerth Airport (PER)Perth, Western Australia, AustraliaView Perth Airport on a map Set PER as destination Airport Set PER as destination Airport Get more information about Perth Airport