Nonstop flight route between Helena, Montana, United States and Mascot (near Sydney), Australia:
Departure Airport:
(46°36'24"N by 111°58'58"W)
Arrival Airport:
(33°56'45"S by 151°10'37"E)
Distance from HLN to SYD:
8,171.76 miles (13,151.14 km)
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Jump to:
- About this route
- HLN Airport Information
- SYD Airport Information
- Facts about HLN
- Facts about SYD
- Map of Nearest Airports to HLN
- List of Nearest Airports to HLN
- Map of Furthest Airports from HLN
- List of Furthest Airports from HLN
- Map of Nearest Airports to SYD
- List of Nearest Airports to SYD
- Map of Furthest Airports from SYD
- List of Furthest Airports from SYD
About this route:
A direct, nonstop flight between Helena Regional Airport (HLN), Helena, Montana, United States and Sydney (Kingsford Smith) Airport (SYD), Mascot (near Sydney), Australia would travel a Great Circle distance of 8,172 miles (or 13,151 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 Sydney (Kingsford Smith) 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 Sydney (Kingsford Smith) 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: |
|
| 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: | SYD / YSSY |
| Airport Names: |
|
| Location: | Mascot (near Sydney), Australia |
| GPS Coordinates: | 33°56'45"S by 151°10'37"E |
| Area Served: | Sydney |
| Operator/Owner: | Sydney Airport Corporation Limited |
| Airport Type: | Public |
| Elevation: | 21 feet (6 meters) |
| # of Runways: | 3 |
| View all routes: | Routes from SYD |
| More Information: | SYD Maps & Info |
Facts about Helena Regional Airport (HLN):
- Helena Regional Airport (HLN) has 3 runways.
- 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.
Facts about Sydney (Kingsford Smith) Airport (SYD):
- Because of Sydney (Kingsford Smith) Airport's relatively low elevation of 21 feet, planes can take off or land at Sydney (Kingsford Smith) 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 Sydney (Kingsford Smith) Airport (SYD) is Bankstown Airport (BWU), which is located only 11 miles (18 kilometers) W of SYD.
- Sydney (Kingsford Smith) Airport (SYD) has 3 runways.
- In addition to being known as "Sydney (Kingsford Smith) Airport", another name for SYD is "Kingsford-Smith Airport".
- In addition to the curfew, Sydney Airport also has a cap of 80 aircraft movements per hour which cannot be exceeded, leading to increased delays during peak hours.
- Sydney Airport is one of the oldest continuously operated airports in the world, and the busiest airport in Australia, handling 35,630,549 passengers in 2011 and 326,686 aircraftmovements in 2013.
- The furthest airport from Sydney (Kingsford Smith) Airport (SYD) is Santa Maria Airport (SMA), which is nearly antipodal to Sydney (Kingsford Smith) Airport (meaning Sydney (Kingsford Smith) Airport is almost on the exact opposite side of the Earth from Santa Maria Airport), and is located 12,144 miles (19,543 kilometers) away in Santa Maria, Portugal.
- The airport provides a shuttle service between the terminals at a cost of A$5.50.
- The Darwin – Sydney route includes data from May 2012, prior data was not released.
| 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 | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10.93 miles (17.58 km) W | Bankstown Airport (BWU) | Bankstown (near Sydney), New South Wales, Australia | |
| 2 | 28.84 miles (46.41 km) WSW | Camden Aerodrome (CDU) | Camden, New South Wales, Australia | |
| 3 | 47.94 miles (77.15 km) SSW | Illawarra Regional Airport (WOL) | Shellharbour, Wollongong, New South Wales, Australia | |
| 4 | 66.55 miles (107.10 km) NNE | Belmont Airport (BEO) | Newcastle, New South Wales, Australia | |
| 5 | 80.56 miles (129.64 km) N | Cessnock Airport (CES) | Cessnock, New South Wales, Australia | |
| 6 | 87.73 miles (141.18 km) NNE | Maitland Airport (MTL) | Maitland, New South Wales, Australia | |
| 7 | 88.11 miles (141.80 km) NNE | Newcastle Airport (NTL) | Newcastle, New South Wales, Australia | |
| 8 | 95.21 miles (153.23 km) WNW | Bathurst Airport (BHS) | Bathurst, New South Wales, Australia | |
| 9 | 102.06 miles (164.25 km) SW | Goulburn Airport (GUL) | Goulburn, New South Wales, Australia | |
| 10 | 131.63 miles (211.84 km) NW | Mudgee Airport (DGE) | Mudgee, New South Wales, Australia | |
| 11 | 146.76 miles (236.19 km) SW | Canberra Airport (CBR) | Canberra, Australia | |
| 12 | 146.99 miles (236.56 km) SSW | Moruya Airport (MYA) | Moruya, New South Wales, Australia | |
| 13 | 175.52 miles (282.48 km) NNW | Coolah Airport (CLH) | Coolah, New South Wales, Australia | |
| 14 | 185.40 miles (298.38 km) WSW | Cootamundra Airport (CMD) | Cootamundra, New South Wales, Australia | |
| 15 | 190.76 miles (306.99 km) WNW | Forbes Airport (FRB) | Forbes, New South Wales, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12,143.59 miles (19,543.17 km) NW | Santa Maria Airport (SMA) | Santa Maria, Portugal | |
| 2 | 12,121.54 miles (19,507.68 km) NNW | João Paulo II Airport (PDL) | Ponta Delgada, Azores, Portugal | |
| 3 | 12,120.72 miles (19,506.36 km) N | Horta International Airport (HOR) | Horta, Azores, Portugal | |
| 4 | 12,117.69 miles (19,501.48 km) N | Pico Airport (PIX) | Pico Island, Azores, Portugal | |
| 5 | 12,090.40 miles (19,457.57 km) NNW | Lajes Air Base (TER) | Lajes, Azores, Portugal | |
| 6 | 12,078.50 miles (19,438.41 km) N | Graciosa Airport (GRW) | Graciosa Island, Azores, Portugal | |
| 7 | 12,035.09 miles (19,368.55 km) NNE | Flores Airport (FLW) | Flores Island, Azores, Portugal | |
| 8 | 12,021.51 miles (19,346.70 km) NNE | Corvo Airport (CVU) | Corvo Island, Azores, Portugal | |
| 9 | 11,736.45 miles (18,887.94 km) W | Madeira Airport (FNC) | Funchal, Madeira, Portugal | |
| 10 | 11,716.13 miles (18,855.24 km) W | Porto Santo Airport (PXO) | Porto Santo, Madeira, Portugal | |
| 11 | 11,687.72 miles (18,809.51 km) WNW | La Palma Airport (SPC) | La Palma, Canary Islands, Spain | |
| 12 | 11,637.71 miles (18,729.02 km) WNW | La Gomera Airport (GMZ) | Alajeró / San Sebastián, Canary Islands, Spain | |
| 13 | 11,609.16 miles (18,683.09 km) WNW | Tenerife North Airport (TFN) | Tenerife, Canary Islands, Spain | |
| 14 | 11,605.42 miles (18,677.06 km) WNW | Tenerife-South Airport (TFS) | Tenerife, Canary Islands, Spain | |
| 15 | 11,539.74 miles (18,571.37 km) WNW | Gran Canaria Airport (LPA) | Las Palmas, Canary Islands, Spain | |