About this route:

A direct, nonstop flight between Helena Regional Airport (HLN), Helena, Montana, United States and Sainte Marie Airport (SMS), Île Sainte-Marie, Madagascar would travel a Great Circle distance of 10,147 miles (or 16,331 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 Helena Regional Airport and Sainte Marie 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 Helena Regional Airport and Sainte Marie Airport. You'll see that it will travel the same route of the red line on this map!

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: SMS / FMMS
Airport Name: Sainte Marie Airport
Location: Île Sainte-Marie, Madagascar
GPS Coordinates: 17°5'38"S by 49°48'56"E
Area Served: Sainte Marie, Analanjirofo, Madagascar
Airport Type: Public
Elevation: 7 feet (2 meters)
# of Runways: 1
View all routes: Routes from SMS
More Information: SMS 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".
  • 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.
  • The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a primary commercial service airport.Federal Aviation Administration records say the airport had 85,649 passenger boardings in calendar year 2008, 88,314 in 2009 and 98,193 in 2010.

Facts about Sainte Marie Airport (SMS):

  • The closest airport to Sainte Marie Airport (SMS) is Toamasino Airport (TMM), which is located 76 miles (122 kilometers) SSW of SMS.
  • Sainte Marie Airport (SMS) currently has only 1 runway.
  • Because of Sainte Marie Airport's relatively low elevation of 7 feet, planes can take off or land at Sainte Marie 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 furthest airport from Sainte Marie Airport (SMS) is Guerrero Negro Airport (GUB), which is located 11,161 miles (17,962 kilometers) away in Guerrero Negro, Baja California Sur, Mexico.

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 Sainte Marie Airport:

List of Nearest Airports to Sainte Marie Airport:

RankDistance & DirectionAirport Name & IATA CodeAirport LocationFurther Actions
175.51 miles (121.52 km) SSWToamasino Airport (TMM)Toamasina, MadagascarView Toamasino Airport on a map Set TMM as destination Airport Set TMM as destination Airport Get more information about Toamasino Airport
2109.66 miles (176.48 km) NWMandritsara Airport (WMA)Mandritsara, MadagascarView Mandritsara Airport on a map Set WMA as destination Airport Set WMA as destination Airport Get more information about Mandritsara Airport
3147.27 miles (237.02 km) WTsaratanana Airport (TTS)Tsaratanana, Madagascar.View Tsaratanana Airport on a map Set TTS as destination Airport Set TTS as destination Airport Get more information about Tsaratanana Airport
4148.54 miles (239.05 km) NNEAntsirabato Airport (ANM)Antalaha, MadagascarView Antsirabato Airport on a map Set ANM as destination Airport Set ANM as destination Airport Get more information about Antsirabato Airport
5179.31 miles (288.56 km) NWPort Bergé Airport (WPB)Port Bergé, MadagascarView Port Bergé Airport on a map Set WPB as destination Airport Set WPB as destination Airport Get more information about Port Bergé Airport
6193.49 miles (311.40 km) SWIvato International Airport (TNR)Antananarivo, MadagascarView Ivato International Airport on a map Set TNR as destination Airport Set TNR as destination Airport Get more information about Ivato International Airport
7218.14 miles (351.06 km) NWAnalalava Airport (HVA)Analalava, MadagascarView Analalava Airport on a map Set HVA as destination Airport Set HVA as destination Airport Get more information about Analalava Airport
8249.90 miles (402.17 km) WNWAmborovy Airport (MJN)Mahajanga, MadagascarView Amborovy Airport on a map Set MJN as destination Airport Set MJN as destination Airport Get more information about Amborovy Airport
9255.83 miles (411.71 km) NNWAmbanja Airport (IVA)Ambanja, MadagascarView Ambanja Airport on a map Set IVA as destination Airport Set IVA as destination Airport Get more information about Ambanja Airport
10272.99 miles (439.33 km) WSWTsiroanomandidy Airport (WTS)Tsiroanomandidy, MadagascarView Tsiroanomandidy Airport on a map Set WTS as destination Airport Set WTS as destination Airport Get more information about Tsiroanomandidy Airport
11275.44 miles (443.27 km) NNWAmbilobe Airport (AMB)Ambilobe, MadagascarView Ambilobe Airport on a map Set AMB as destination Airport Set AMB as destination Airport Get more information about Ambilobe Airport
12279.38 miles (449.62 km) WAmbatomainty Airport (AMY)Ambatomainty, MadagascarView Ambatomainty Airport on a map Set AMY as destination Airport Set AMY as destination Airport Get more information about Ambatomainty Airport
13299.34 miles (481.74 km) SSWMananjary Airport (MNJ)Mananjary, MadagascarView Mananjary Airport on a map Set MNJ as destination Airport Set MNJ as destination Airport Get more information about Mananjary Airport
14302.75 miles (487.22 km) WNWSoalala Airport (DWB)Soalala, MadagascarView Soalala Airport on a map Set DWB as destination Airport Set DWB as destination Airport Get more information about Soalala Airport
15320.40 miles (515.63 km) WSWAnkavandra Airport (JVA)Ankavandra, MadagascarView Ankavandra Airport on a map Set JVA as destination Airport Set JVA as destination Airport Get more information about Ankavandra Airport

Map of Furthest Airports from Sainte Marie Airport:

List of Furthest Airports from Sainte Marie Airport:

RankDistance & DirectionAirport Name & IATA CodeAirport LocationFurther Actions
111,160.95 miles (17,961.77 km) NWGuerrero Negro Airport (GUB)Guerrero Negro, Baja California Sur, MexicoView Guerrero Negro Airport on a map Set GUB as destination Airport Set GUB as destination Airport Get more information about Guerrero Negro Airport
211,121.21 miles (17,897.80 km) WNWCiudad Constitución Airport (CUA)Ciudad Constitución, Baja California Sur, MexicoView Ciudad Constitución Airport on a map Set CUA as destination Airport Set CUA as destination Airport Get more information about Ciudad Constitución Airport
311,112.23 miles (17,883.35 km) NWEnsenada Airport (ESE)Ensenada, Baja California, MexicoView Ensenada Airport on a map Set ESE as destination Airport Set ESE as destination Airport Get more information about Ensenada Airport
411,103.17 miles (17,868.77 km) NNWSanta Cruz Island Airport (SZN)Santa Barbara, California, United StatesView Santa Cruz Island Airport on a map Set SZN as destination Airport Set SZN as destination Airport Get more information about Santa Cruz Island Airport
511,101.15 miles (17,865.52 km) NWBahía de los Ángeles Airport (BHL)Bahía de los Ángeles, Baja California, MéxicoView Bahía de los Ángeles Airport on a map Set BHL as destination Airport Set BHL as destination Airport Get more information about Bahía de los Ángeles Airport
611,093.48 miles (17,853.19 km) NNWCatalina AirportBuffalo Springs Airport (CIB)Avalon, California, United StatesView Catalina AirportBuffalo Springs Airport on a map Set CIB as destination Airport Set CIB as destination Airport Get more information about Catalina AirportBuffalo Springs Airport
711,092.50 miles (17,851.61 km) NWNaval Outlying Landing Field Imperial Beach (NRS)Imperial Beach, California, United StatesView Naval Outlying Landing Field Imperial Beach on a map Set NRS as destination Airport Set NRS as destination Airport Get more information about Naval Outlying Landing Field Imperial Beach
811,089.23 miles (17,846.34 km) NWNAS North Island (NZY)San Diego, California, United StatesView NAS North Island on a map Set NZY as destination Airport Set NZY as destination Airport Get more information about NAS North Island
911,088.31 miles (17,844.86 km) NWTijuana International Airport (TIJ)Tijuana, Baja California, MexicoView Tijuana International Airport on a map Set TIJ as destination Airport Set TIJ as destination Airport Get more information about Tijuana International Airport
1011,087.06 miles (17,842.84 km) NWBrown Field Municipal Airport (SDM)San Diego, California, United StatesView Brown Field Municipal Airport on a map Set SDM as destination Airport Set SDM as destination Airport Get more information about Brown Field Municipal Airport
1111,086.45 miles (17,841.87 km) NWSan Diego International Airport (SAN)San Diego, California, United StatesView San Diego International Airport on a map Set SAN as destination Airport Set SAN as destination Airport Get more information about San Diego International Airport
1211,082.62 miles (17,835.71 km) NNWLompoc Airport (LPC)Lompoc, California, United StatesView Lompoc Airport on a map Set LPC as destination Airport Set LPC as destination Airport Get more information about Lompoc Airport
1311,081.44 miles (17,833.81 km) WNWLoreto International Airport (LTO)Loreto, Baja California Sur, MexicoView Loreto International Airport on a map Set LTO as destination Airport Set LTO as destination Airport Get more information about Loreto International Airport
1411,081.30 miles (17,833.57 km) NNWVandenberg Air Force Base (VBG)Lompoc, California, United StatesView Vandenberg Air Force Base on a map Set VBG as destination Airport Set VBG as destination Airport Get more information about Vandenberg Air Force Base
1511,080.22 miles (17,831.85 km) NWMontgomery Field (MYF)San Diego, California, United StatesView Montgomery Field on a map Set MYF as destination Airport Set MYF as destination Airport Get more information about Montgomery Field