Nonstop flight route between Alliance, Nebraska, United States and Sidney, Montana, United States:
Departure Airport:
(42°3'11"N by 102°48'14"W)
Arrival Airport:
(47°42'24"N by 104°11'32"W)
Distance from AIA to SDY:
396.48 miles (638.07 km)
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Jump to:
- About this route
- AIA Airport Information
- SDY Airport Information
- Facts about AIA
- Facts about SDY
- Map of Nearest Airports to AIA
- List of Nearest Airports to AIA
- Map of Furthest Airports from AIA
- List of Furthest Airports from AIA
- Map of Nearest Airports to SDY
- List of Nearest Airports to SDY
- Map of Furthest Airports from SDY
- List of Furthest Airports from SDY
About this route:
A direct, nonstop flight between Alliance Municipal Airport (AIA), Alliance, Nebraska, United States and Sidney-Richland Municipal Airport (SDY), Sidney, Montana, United States would travel a Great Circle distance of 396 miles (or 638 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 relatively short distance between Alliance Municipal Airport and Sidney-Richland Municipal Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | AIA / KAIA |
| Airport Names: |
|
| Location: | Alliance, Nebraska, United States |
| GPS Coordinates: | 42°3'11"N by 102°48'14"W |
| Area Served: | Alliance, Nebraska |
| Operator/Owner: | City of Alliance |
| Airport Type: | Public |
| Elevation: | 3931 feet (1,198 meters) |
| # of Runways: | 3 |
| View all routes: | Routes from AIA |
| More Information: | AIA Maps & Info |
Arrival 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 |
Facts about Alliance Municipal Airport (AIA):
- In addition to being known as "Alliance Municipal Airport", another name for AIA is "(former Alliance Army Airfield)".
- Due to disputes between the U.S.
- The closest airport to Alliance Municipal Airport (AIA) is Western Nebraska Regional Airport (BFF), which is located 43 miles (68 kilometers) WSW of AIA.
- Alliance Municipal Airport (AIA) has 3 runways.
- The furthest airport from Alliance Municipal Airport (AIA) is Sir Gaëtan Duval Airport (RRG), which is located 10,697 miles (17,215 kilometers) away in Rodrigues Island, Mauritius.
- In addition to the USAAF units, the Army 326th Glider Infantry, 507th Parachute Infantry, and 878th Airborne Engineers trained at Alliance before deployment to the European Theater.
- By December 1945 the facility was declared surplus property.
- The airport covers 3,500 acres at an elevation of 3,931 feet.
- Alliance Municipal Airport was built during World War II by the United States Army Air Forces It was one of eleven USAAF training airfields in Nebraska during World War II.
Facts about Sidney-Richland Municipal Airport (SDY):
- 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.
- 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 covers an area of 335 acres at an elevation of 1,985 feet above mean sea level.
- Sidney-Richland Municipal Airport (SDY) has 2 runways.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 42.52 miles (68.43 km) WSW | Western Nebraska Regional Airport (BFF) | Scottsbluff, Nebraska, United States |     |
| 2 | 56.18 miles (90.41 km) NNW | Chadron Municipal Airport (CDR) | Chadron, Nebraska, United States | |
| 3 | 66.55 miles (107.10 km) S | Sidney Municipal Airport (SNY) | Sidney, Nebraska, United States | |
| 4 | 68.60 miles (110.40 km) NNE | Pine Ridge Airport (XPR) | Pine Ridge, South Dakota, United States | |
| 5 | 69.20 miles (111.37 km) W | Torrington Municipal Airport (TOR) | Torrington, Wyoming, United States | |
| 6 | 120.81 miles (194.42 km) WSW | Cheyenne Regional Airport (CYS) | Cheyenne, Wyoming, United States | |
| 7 | 124.12 miles (199.75 km) WSW | Francis E. Warren Air Force Base (FEW) | Cheyenne, Wyoming, United States | |
| 8 | 126.92 miles (204.25 km) ESE | North Platte Regional Airport (LBF) | North Platte, Nebraska, United States | |
| 9 | 127.65 miles (205.43 km) ENE | Miller Field (VTN) | Valentine, Nebraska, United States | |
| 10 | 131.55 miles (211.71 km) S | Colorado Plains Regional Airport (AKO) | Akron, Colorado, United States | |
| 11 | 138.22 miles (222.45 km) N | Rapid City Regional Airport (RAP) | Rapid City, South Dakota, United States | |
| 12 | 141.35 miles (227.48 km) WNW | Converse County Airport (DGW) | Douglas, Wyoming, United States | |
| 13 | 145.26 miles (233.77 km) N | Ellsworth Air Force Base (RCA) | Rapid City, South Dakota, United States | |
| 14 | 146.60 miles (235.93 km) SW | Greeley-Weld County Airport (GXY) | Greeley, Colorado, United States | |
| 15 | 148.12 miles (238.38 km) ENE | Ainsworth Regional Airport (ANW) | Ainsworth, Nebraska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,696.91 miles (17,214.97 km) SSE | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,559.59 miles (16,993.98 km) SE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 3 | 10,527.35 miles (16,942.09 km) SE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 4 | 10,506.71 miles (16,908.88 km) SE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 10,353.37 miles (16,662.10 km) ESE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 6 | 10,316.77 miles (16,603.18 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 7 | 10,293.82 miles (16,566.25 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 8 | 10,273.71 miles (16,533.90 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 9 | 10,269.88 miles (16,527.73 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 10 | 10,233.46 miles (16,469.11 km) ESE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 11 | 10,231.84 miles (16,466.50 km) W | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 12 | 10,230.37 miles (16,464.14 km) ESE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 13 | 10,217.47 miles (16,443.39 km) W | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 14 | 10,208.33 miles (16,428.68 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 15 | 10,207.77 miles (16,427.77 km) W | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 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 | |