Nonstop flight route between Denis Island, Seychelles and Helena, Montana, United States:
Departure Airport:
(3°48'1"S by 55°39'52"E)
Arrival Airport:
(46°36'24"N by 111°58'58"W)
Distance from DEI to HLN:
9,387.84 miles (15,108.23 km)
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Jump to:
- About this route
- DEI Airport Information
- HLN Airport Information
- Facts about DEI
- Facts about HLN
- Map of Nearest Airports to DEI
- List of Nearest Airports to DEI
- Map of Furthest Airports from DEI
- List of Furthest Airports from DEI
- Map of Nearest Airports to HLN
- List of Nearest Airports to HLN
- Map of Furthest Airports from HLN
- List of Furthest Airports from HLN
About this route:
A direct, nonstop flight between Denis Island Airport (DEI), Denis Island, Seychelles and Helena Regional Airport (HLN), Helena, Montana, United States would travel a Great Circle distance of 9,388 miles (or 15,108 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 Denis Island Airport and Helena Regional 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 Denis Island Airport and Helena Regional Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | DEI / FSSD |
| Airport Name: | Denis Island Airport |
| Location: | Denis Island, Seychelles |
| GPS Coordinates: | 3°48'1"S by 55°39'52"E |
| Operator/Owner: | Denis Island |
| Airport Type: | Private |
| Elevation: | 10 feet (3 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from DEI |
| More Information: | DEI Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | HLN / KHLN |
| Airport Names: |
|
| 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 |
Facts about Denis Island Airport (DEI):
- Denis Island Airport (DEI) currently has only 1 runway.
- The furthest airport from Denis Island Airport (DEI) is Atuona Airport (AUQ), which is located 11,058 miles (17,797 kilometers) away in Atuona, Marquesas Islands, French Polynesia.
- Because of Denis Island Airport's relatively low elevation of 10 feet, planes can take off or land at Denis 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 closest airport to Denis Island Airport (DEI) is Bird Island Airport (BDI), which is located 32 miles (51 kilometers) W of DEI.
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 (HLN) has 3 runways.
- 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.
- 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.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 31.89 miles (51.32 km) W | Bird Island Airport (BDI) | Bird Island, Seychelles |     |
| 2 | 35.90 miles (57.78 km) S | Praslin Island Airport (PRI) | Praslin Island, Seychelles | |
| 3 | 57.52 miles (92.56 km) SSE | Frégate Island Airport (FRK) | Frégate Island, Seychelles | |
| 4 | 61.18 miles (98.46 km) S | Seychelles International Airport (SEZ) | Mahé, Seychelles | |
| 5 | 190.69 miles (306.89 km) SW | Desroches Island Airport (DES) | Desroches Island, Seychelles | |
| 6 | 733.87 miles (1,181.05 km) SW | Arrachart Airport (DIE) | Antsiranana, Madagascar | |
| 7 | 792.72 miles (1,275.76 km) SW | Ambilobe Airport (AMB) | Ambilobe, Madagascar | |
| 8 | 801.60 miles (1,290.05 km) NW | Obbia Airport (CMO) | Obbia, Somalia | |
| 9 | 820.46 miles (1,320.40 km) WNW | Aden Adde International Airport (MGQ) | Mogadishu, Somalia | |
| 10 | 838.87 miles (1,350.02 km) SW | Ambanja Airport (IVA) | Ambanja, Madagascar | |
| 11 | 854.98 miles (1,375.95 km) SSW | Antsirabato Airport (ANM) | Antalaha, Madagascar | |
| 12 | 921.55 miles (1,483.09 km) SW | Analalava Airport (HVA) | Analalava, Madagascar | |
| 13 | 924.73 miles (1,488.21 km) NW | Abdullahi Yusuf International Airport (GLK) | Galcaio, Somalia | |
| 14 | 942.40 miles (1,516.64 km) WNW | Kismayo Airport (KMU) | Kisimayu, Somalia | |
| 15 | 943.34 miles (1,518.15 km) SW | Dzaoudzi Pamandzi International Airport (DZA) | Dzaoudzi, Mayotte | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,058.49 miles (17,796.87 km) SE | Atuona Airport (AUQ) | Atuona, Marquesas Islands, French Polynesia | |
| 2 | 10,781.23 miles (17,350.67 km) NW | Los Cabos International Airport (SJD) | Los Cabos, Mexico | |
| 3 | 10,754.90 miles (17,308.29 km) NNW | Manuel Márquez de León International Airport (LAP) | La Paz, Baja California Sur, Mexico | |
| 4 | 10,742.47 miles (17,288.28 km) NNW | Ciudad Constitución Airport (CUA) | Ciudad Constitución, Baja California Sur, Mexico | |
| 5 | 10,732.53 miles (17,272.29 km) NW | Playa de Oro International Airport (ZLO) | Manzanillo, Colima, Mexico | |
| 6 | 10,703.08 miles (17,224.90 km) NW | Lic. Gustavo Díaz Ordaz International Airport (PVR) | Puerto Vallarta, Jalisco, Mexico | |
| 7 | 10,682.85 miles (17,192.33 km) SSE | Pukarua Airport (PUK) | Pukarua, Tuamotus, French Polynesia | |
| 8 | 10,678.75 miles (17,185.74 km) NNW | Loreto International Airport (LTO) | Loreto, Baja California Sur, Mexico | |
| 9 | 10,675.03 miles (17,179.75 km) NW | Licenciado Miguel de la Madrid Airport (CLQ) | Colima, Colima, Mexico | |
| 10 | 10,671.03 miles (17,173.31 km) SE | Fangatau Airport (FGU) | Fangatau, French Polynesia | |
| 11 | 10,649.92 miles (17,139.34 km) NW | Amado Nervo International Airport (TPQ) | Tepic, Nayarit, Mexico | |
| 12 | 10,647.88 miles (17,136.05 km) NW | Lázaro Cárdenas Airport (LZC) | Lázaro Cárdenas, Michoacán, Mexico | |
| 13 | 10,635.05 miles (17,115.42 km) NW | General Rafael Buelna International Airport (MZT) | Mazatlán, Sinaloa, Mexico | |
| 14 | 10,630.62 miles (17,108.28 km) NNW | Guerrero Negro Airport (GUB) | Guerrero Negro, Baja California Sur, Mexico | |
| 15 | 10,618.25 miles (17,088.37 km) WNW | Ixtapa-Zihuatanejo International Airport (ZIH) | Zihuatanejo, Guerrero, Mexico | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 51.31 miles (82.58 km) SSW | Bert Mooney Airport (BTM) | Butte, Montana, United States | |
| 2 | 67.05 miles (107.90 km) NNE | Great Falls International Airport (GTF) | Great Falls, Montana, United States | |
| 3 | 69.72 miles (112.21 km) SE | Bozeman Yellowstone International Airport (BZN) | Bozeman, Montana, United States | |
| 4 | 72.47 miles (116.63 km) NNE | Malmstrom Air Force Base (GFA) | Great Falls, Montana, United States | |
| 5 | 96.56 miles (155.40 km) SE | Mission Field (LVM) | Livingston, Montana, United States | |
| 6 | 97.30 miles (156.59 km) SSW | Dillon Airport (DLN) | Dillon, Montana, United States | |
| 7 | 102.03 miles (164.20 km) WNW | Missoula International Airport (MSO) | Missoula, Montana, United States | |
| 8 | 122.80 miles (197.63 km) ENE | Lewistown Municipal Airport (LWT) | Lewistown, Montana, United States | |
| 9 | 133.72 miles (215.20 km) N | Shelby Airport (SBX) | Shelby, Montana, United States | |
| 10 | 137.25 miles (220.89 km) SW | Lemhi County Airport (SMN) | Salmon, Idaho, United States | |
| 11 | 138.97 miles (223.65 km) SSE | Yellowstone Airport (WYS) | West Yellowstone, Montana, United States | |
| 12 | 139.51 miles (224.52 km) N | Cut Bank Municipal AirportCut Bank Army Air Field (CTB) | Cut Bank, Montana, United States | |
| 13 | 158.54 miles (255.14 km) NW | Glacier Park International Airport (FCA) | Kalispell, Montana, United States | |
| 14 | 163.70 miles (263.45 km) E | Roundup Airport (RPX) | Roundup, Montana, United States | |
| 15 | 169.14 miles (272.20 km) NE | Havre City-County Airport (HVR) | Havre, Montana, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,563.08 miles (16,999.59 km) S | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,552.15 miles (16,981.99 km) SSE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 3 | 10,548.64 miles (16,976.36 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 4 | 10,536.59 miles (16,956.96 km) SSE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 5 | 10,525.82 miles (16,939.62 km) SSE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 6 | 10,452.26 miles (16,821.24 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 7 | 10,363.52 miles (16,678.43 km) SE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 8 | 10,340.10 miles (16,640.74 km) SE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 10,252.07 miles (16,499.06 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 10 | 10,247.66 miles (16,491.97 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 11 | 10,235.05 miles (16,471.68 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 10,200.52 miles (16,416.11 km) SE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 13 | 10,189.58 miles (16,398.51 km) SE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 14 | 10,174.40 miles (16,374.07 km) SE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |
| 15 | 10,162.80 miles (16,355.40 km) ESE | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |