Nonstop flight route between Kilronan, Inishmore, Ireland and Helena, Montana, United States:
Departure Airport:
(53°6'24"N by 9°39'14"W)
Arrival Airport:
(46°36'24"N by 111°58'58"W)
Distance from IOR to HLN:
4,177.14 miles (6,722.43 km)
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- About this route
- IOR Airport Information
- HLN Airport Information
- Facts about IOR
- Facts about HLN
- Map of Nearest Airports to IOR
- List of Nearest Airports to IOR
- Map of Furthest Airports from IOR
- List of Furthest Airports from IOR
- 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 Inishmore Aerodrome (IOR), Kilronan, Inishmore, Ireland and Helena Regional Airport (HLN), Helena, Montana, United States would travel a Great Circle distance of 4,177 miles (or 6,722 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 Inishmore Aerodrome 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 Inishmore Aerodrome 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: | IOR / EIIM |
| Airport Names: |
|
| Location: | Kilronan, Inishmore, Ireland |
| GPS Coordinates: | 53°6'24"N by 9°39'14"W |
| Area Served: | Inishmore, Aran Islands, County Galway, Ireland |
| Operator/Owner: | Údarás na Gaeltachta Na Forbacha |
| Airport Type: | Private |
| Elevation: | 24 feet (7 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from IOR |
| More Information: | IOR 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 Inishmore Aerodrome (IOR):
- Inishmore Aerodrome (IOR) currently has only 1 runway.
- The closest airport to Inishmore Aerodrome (IOR) is Inishmaan Aerodrome (IIA), which is located only 4 miles (6 kilometers) ESE of IOR.
- The furthest airport from Inishmore Aerodrome (IOR) is Ryan's Creek Aerodrome (SZS), which is located 11,997 miles (19,307 kilometers) away in Stewart Island, New Zealand.
- Because of Inishmore Aerodrome's relatively low elevation of 24 feet, planes can take off or land at Inishmore Aerodrome 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.
- In addition to being known as "Inishmore Aerodrome", another name for IOR is "Kilronan Airport".
Facts about Helena Regional Airport (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.
- The closest airport to Helena Regional Airport (HLN) is Bert Mooney Airport (BTM), which is located 51 miles (83 kilometers) SSW of HLN.
- 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.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 3.63 miles (5.84 km) ESE | Inishmaan Aerodrome (IIA) | Inishmaan, Ireland |     |
| 2 | 6.61 miles (10.64 km) ESE | Inisheer Aerodrome (INQ) | Inisheer, Ireland | |
| 3 | 11.51 miles (18.52 km) NE | Connemara Airport (NNR) | Inverin, Ireland | |
| 4 | 32.38 miles (52.11 km) ENE | Galway Airport (GWY) | Galway, Ireland | |
| 5 | 41.31 miles (66.48 km) SE | Shannon Airport (SNN) | Shannon (County Clare), Ireland | |
| 6 | 64.22 miles (103.35 km) S | Kerry Airport (KIR) | Tralee, County Kerry, Ireland | |
| 7 | 65.26 miles (105.02 km) NNE | Ireland West Airport Knock (NOC) | Knock, Ireland | |
| 8 | 78.63 miles (126.54 km) N | Belmullet Aerodrome (BLY) | Belmullet, Ireland | |
| 9 | 91.84 miles (147.79 km) NNE | Sligo Airport (SXL) | Strandhill (near Sligo), Ireland | |
| 10 | 99.62 miles (160.32 km) S | Bantry Aerodrome (BYT) | Bantry, County Cork, Ireland | |
| 11 | 100.20 miles (161.26 km) SSE | Cork Airport (ORK) | Cork, Ireland | |
| 12 | 103.24 miles (166.14 km) ESE | Kilkenny Airport (KKY) | Kilkenny, Ireland | |
| 13 | 121.04 miles (194.80 km) NE | Enniskillen/St Angelo Airport (ENK) | Enniskillen, Co Fermanagh, Northern Ireland, United Kingdom | |
| 14 | 124.96 miles (201.10 km) ESE | Waterford Airport (WAT) | Waterford, Ireland | |
| 15 | 141.51 miles (227.73 km) E | Dublin Airport (DUB) | Dublin, Ireland | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,996.55 miles (19,306.53 km) SSE | Ryan's Creek Aerodrome (SZS) | Stewart Island, New Zealand | |
| 2 | 11,965.47 miles (19,256.51 km) SSE | Invercargill Airport (IVC) | Invercargill, New Zealand | |
| 3 | 11,940.74 miles (19,216.71 km) S | Dunedin International Airport (DUD) | Dunedin, Otago, New Zealand | |
| 4 | 11,889.53 miles (19,134.30 km) S | Alexandra Aerodrome (ALR) | Alexandra, New Zealand | |
| 5 | 11,873.61 miles (19,108.68 km) S | Oamaru Airport (OAM) | Oamaru, North Otago, New Zealand | |
| 6 | 11,873.44 miles (19,108.41 km) S | Queenstown Airport (ZQN) | Queenstown, New Zealand | |
| 7 | 11,855.36 miles (19,079.30 km) S | Wanaka Airport (WKA) | Wanaka, New Zealand | |
| 8 | 11,843.88 miles (19,060.83 km) SSE | Milford Sound Airport (MFN) | Milford Sound, New Zealand | |
| 9 | 11,827.18 miles (19,033.96 km) S | Richard Pearse Airport (Timaru Airport) (TIU) | Timaru, New Zealand | |
| 10 | 11,801.04 miles (18,991.89 km) S | Glentanner Aerodrome (GTN) | Mount Cook, New Zealand | |
| 11 | 11,797.47 miles (18,986.14 km) S | Ashburton Aerodrome (ASG) | Ashburton, New Zealand | |
| 12 | 11,791.39 miles (18,976.35 km) S | Mount Cook Airport (MON) | Mount Cook, New Zealand | |
| 13 | 11,770.24 miles (18,942.31 km) S | Fox Glacier Aerodrome (FGL) | Fox Glacier, New Zealand | |
| 14 | 11,764.82 miles (18,933.60 km) S | Christchurch International Airport (CHC) | Christchurch, New Zealand | |
| 15 | 11,718.09 miles (18,858.39 km) S | Hokitika Airport (HKK) | Hokitika, New Zealand | |
| 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 | |