Nonstop flight route between Sidney, Montana, United States and Lord Howe Island, New South Wales, Australia:
Departure Airport:
(47°42'24"N by 104°11'32"W)
Arrival Airport:
(31°32'17"S by 159°4'37"E)
Distance from SDY to LDH:
8,084.56 miles (13,010.81 km)
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Jump to:
- About this route
- SDY Airport Information
- LDH Airport Information
- Facts about SDY
- Facts about LDH
- Map of Nearest Airports to SDY
- List of Nearest Airports to SDY
- Map of Furthest Airports from SDY
- List of Furthest Airports from SDY
- Map of Nearest Airports to LDH
- List of Nearest Airports to LDH
- Map of Furthest Airports from LDH
- List of Furthest Airports from LDH
About this route:
A direct, nonstop flight between Sidney-Richland Municipal Airport (SDY), Sidney, Montana, United States and Lord Howe Island Airport (LDH), Lord Howe Island, New South Wales, Australia would travel a Great Circle distance of 8,085 miles (or 13,011 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 Sidney-Richland Municipal Airport and Lord Howe Island 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 Sidney-Richland Municipal Airport and Lord Howe Island Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | SDY / KSDY |
| Airport Name: | Sidney-Richland Municipal Airport |
| Location: | Sidney, Montana, United States |
| GPS Coordinates: | 47°42'24"N by 104°11'32"W |
| Area Served: | Sidney, Montana |
| Operator/Owner: | Sidney Richland Airport Authority |
| Airport Type: | Public |
| Elevation: | 1985 feet (605 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from SDY |
| More Information: | SDY Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | LDH / YLHI |
| Airport Name: | Lord Howe Island Airport |
| Location: | Lord Howe Island, New South Wales, Australia |
| GPS Coordinates: | 31°32'17"S by 159°4'37"E |
| Area Served: | Lord Howe Island, New South Wales, Australia |
| Operator/Owner: | Lord Howe Island Board |
| Airport Type: | Public |
| Elevation: | 17 feet (5 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from LDH |
| More Information: | LDH Maps & Info |
Facts about Sidney-Richland Municipal Airport (SDY):
- The closest airport to Sidney-Richland Municipal Airport (SDY) is Sloulin Field International Airport (ISN), which is located 41 miles (67 kilometers) NE of SDY.
- Sidney-Richland Municipal Airport (SDY) has 2 runways.
- The furthest airport from Sidney-Richland Municipal Airport (SDY) is Sir Gaëtan Duval Airport (RRG), which is located 10,383 miles (16,711 kilometers) away in Rodrigues Island, Mauritius.
- Scheduled air service temporarily ceased on March 8, 2008, when Big Sky Airlines ended operations in bankruptcy.
Facts about Lord Howe Island Airport (LDH):
- Lord Howe Island Airport served 33,385 revenue passengers during financial year 2009-2010,ranking it 64th amongst airports in Australia.
- Lord Howe Island Airport (LDH) currently has only 1 runway.
- The closest airport to Lord Howe Island Airport (LDH) is Coffs Harbour Airport (CFS), which is located 363 miles (584 kilometers) WNW of LDH.
- Lord Howe Island is an important transit and refueling point for light aircraft flying between Australia, Norfolk Island and New Zealand.
- The furthest airport from Lord Howe Island Airport (LDH) is Madeira Airport (FNC), which is nearly antipodal to Lord Howe Island Airport (meaning Lord Howe Island Airport is almost on the exact opposite side of the Earth from Madeira Airport), and is located 12,181 miles (19,604 kilometers) away in Funchal, Madeira, Portugal.
- The airport's elevation above mean sea level is 17 ft and it has one runway, measuring 886 m × 30 m.
- Because of Lord Howe Island Airport's relatively low elevation of 17 feet, planes can take off or land at Lord Howe 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.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 41.33 miles (66.52 km) NE | Sloulin Field International Airport (ISN) | Williston, North Dakota, United States |     |
| 2 | 48.66 miles (78.31 km) SW | Dawson Community Airport (GDV) | Glendive, Montana, United States | |
| 3 | 69.41 miles (111.70 km) WNW | L. M. Clayton Airport (OLF) | Wolf Point, Montana, United States | |
| 4 | 76.29 miles (122.77 km) NNW | Sher-Wood Airport (PWD) | Plentywood, Montana, United States | |
| 5 | 90.57 miles (145.76 km) SE | Dickinson Theodore Roosevelt Regional Airport (DIK) | Dickinson, North Dakota, United States | |
| 6 | 111.04 miles (178.70 km) SSE | Bowman Municipal Airport (BWM) | Bowman, North Dakota, United States | |
| 7 | 117.38 miles (188.91 km) WNW | Glasgow International Airport (GGW) | Glasgow, Montana, United States | |
| 8 | 118.10 miles (190.06 km) NNE | Estevan Regional Aerodrome (YEN) | Estevan, Saskatchewan, Canada | |
| 9 | 118.99 miles (191.50 km) SW | Miles City Airport (MLS) | Miles City, Montana, United States | |
| 10 | 131.42 miles (211.49 km) W | Jordan Airport (JDN) | Jordan, Montana, United States | |
| 11 | 139.74 miles (224.89 km) ENE | Minot Air Force Base (MIB) | Minot, North Dakota, United States | |
| 12 | 140.05 miles (225.38 km) ENE | Minot International Airport (MOT) | Minot, North Dakota, United States | |
| 13 | 174.07 miles (280.14 km) ESE | Bismarck Municipal Airport (BIS) | Bismarck, North Dakota, United States | |
| 14 | 189.51 miles (304.99 km) N | Regina International Airport (YQR) | Regina, Saskatchewan, Canada | |
| 15 | 191.53 miles (308.24 km) NNW | CFB Moose Jaw (YMJ) | Moose Jaw, Saskatchewan, Canada | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,383.49 miles (16,710.57 km) SSE | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,297.57 miles (16,572.29 km) SE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 3 | 10,290.39 miles (16,560.74 km) SE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 4 | 10,266.41 miles (16,522.14 km) SE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 10,218.50 miles (16,445.05 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 6 | 10,203.17 miles (16,420.36 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 7 | 10,179.29 miles (16,381.94 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 8 | 10,169.42 miles (16,366.06 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 9 | 10,153.64 miles (16,340.65 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 10 | 10,120.11 miles (16,286.69 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 11 | 10,113.85 miles (16,276.63 km) ESE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 12 | 10,100.83 miles (16,255.67 km) WSW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 13 | 10,089.33 miles (16,237.15 km) WSW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 14 | 10,078.56 miles (16,219.83 km) WSW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 15 | 10,076.48 miles (16,216.49 km) W | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 363.11 miles (584.37 km) WNW | Coffs Harbour Airport (CFS) | Coffs Harbour, New South Wales, Australia | |
| 2 | 366.14 miles (589.25 km) W | Port Macquarie Airport (PQQ) | Port Macquarie, New South Wales, Australia | |
| 3 | 373.68 miles (601.37 km) W | Kempsey Airport (KPS) | Kempsey, New South Wales, Australia | |
| 4 | 377.27 miles (607.16 km) WNW | Evans Head Memorial Aerodrome (EVH) | Evans Head, New South Wales, Australia | |
| 5 | 378.66 miles (609.39 km) WNW | Ballina Byron Gateway Airport (BNK) | Ballina, New South Wales, Australia | |
| 6 | 379.81 miles (611.24 km) WNW | Clarence Valley Regional Airport (GFN) | Grafton, New South Wales, Australia | |
| 7 | 394.60 miles (635.04 km) WNW | Lismore Airport (LSY) | Lismore, New South Wales, Australia | |
| 8 | 407.11 miles (655.18 km) WNW | Gold Coast Airport (OOL) | Coolangatta, Queensland, Australia | |
| 9 | 432.32 miles (695.76 km) WSW | Newcastle Airport (NTL) | Newcastle, New South Wales, Australia | |
| 10 | 446.40 miles (718.42 km) WSW | Belmont Airport (BEO) | Newcastle, New South Wales, Australia | |
| 11 | 447.08 miles (719.50 km) W | Armidale Airport (ARM) | Armidale, New South Wales, Australia | |
| 12 | 451.21 miles (726.15 km) WSW | Maitland Airport (MTL) | Maitland, New South Wales, Australia | |
| 13 | 457.66 miles (736.53 km) WNW | Glen Innes Airport (GLI) | Glen Innes, New South Wales, Australia | |
| 14 | 459.12 miles (738.87 km) NW | Brisbane Airport (BNE) | Brisbane, Queensland, Australia | |
| 15 | 460.51 miles (741.11 km) WSW | Cessnock Airport (CES) | Cessnock, New South Wales, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12,181.46 miles (19,604.12 km) WNW | Madeira Airport (FNC) | Funchal, Madeira, Portugal | |
| 2 | 12,160.54 miles (19,570.44 km) NW | La Palma Airport (SPC) | La Palma, Canary Islands, Spain | |
| 3 | 12,149.55 miles (19,552.75 km) WNW | Porto Santo Airport (PXO) | Porto Santo, Madeira, Portugal | |
| 4 | 12,107.90 miles (19,485.72 km) NW | La Gomera Airport (GMZ) | Alajeró / San Sebastián, Canary Islands, Spain | |
| 5 | 12,090.89 miles (19,458.36 km) NW | Tenerife North Airport (TFN) | Tenerife, Canary Islands, Spain | |
| 6 | 12,081.45 miles (19,443.17 km) NW | Tenerife-South Airport (TFS) | Tenerife, Canary Islands, Spain | |
| 7 | 12,021.69 miles (19,346.99 km) NW | Gran Canaria Airport (LPA) | Las Palmas, Canary Islands, Spain | |
| 8 | 11,989.82 miles (19,295.69 km) NNE | Santa Maria Airport (SMA) | Santa Maria, Portugal | |
| 9 | 11,964.85 miles (19,255.50 km) WNW | Lanzarote Airport (ACE) | Arrecife, Canary Islands, Spain | |
| 10 | 11,963.80 miles (19,253.82 km) WNW | Fuerteventura Airport (FUE) | Puerto del Rosario, Fuerteventura, Canary Islands, Spain | |
| 11 | 11,929.64 miles (19,198.84 km) NNE | João Paulo II Airport (PDL) | Ponta Delgada, Azores, Portugal | |
| 12 | 11,882.86 miles (19,123.56 km) WNW | Hassan I Airport El Aaiún Airport (EUN) | El Aaiún (Laayoune), Morocco | |
| 13 | 11,828.45 miles (19,036.00 km) NNE | Lajes Air Base (TER) | Lajes, Azores, Portugal | |
| 14 | 11,816.30 miles (19,016.45 km) NNW | Dakhla Airport (VIL) | Dakhla, Western Sahara | |
| 15 | 11,815.18 miles (19,014.64 km) WNW | Tan Tan Airport (TTA) | Tan-Tan, Morocco | |