Nonstop flight route between Iliamna, Alaska, United States and Sidney, Montana, United States:
Departure Airport:
(59°45'14"N by 154°54'38"W)
Arrival Airport:
(47°42'24"N by 104°11'32"W)
Distance from ILI to SDY:
2,168.98 miles (3,490.63 km)
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Jump to:
- About this route
- ILI Airport Information
- SDY Airport Information
- Facts about ILI
- Facts about SDY
- Map of Nearest Airports to ILI
- List of Nearest Airports to ILI
- Map of Furthest Airports from ILI
- List of Furthest Airports from ILI
- 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 Iliamna Airport (ILI), Iliamna, Alaska, United States and Sidney-Richland Municipal Airport (SDY), Sidney, Montana, United States would travel a Great Circle distance of 2,169 miles (or 3,491 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 Iliamna 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: | ILI / PAIL |
| Airport Name: | Iliamna Airport |
| Location: | Iliamna, Alaska, United States |
| GPS Coordinates: | 59°45'14"N by 154°54'38"W |
| Area Served: | Iliamna, Alaska |
| Operator/Owner: | Alaska DOT&PF - Central Region |
| Airport Type: | Public |
| Elevation: | 192 feet (59 meters) |
| # of Runways: | 4 |
| View all routes: | Routes from ILI |
| More Information: | ILI 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 Iliamna Airport (ILI):
- Iliamna Airport (ILI) has 4 runways.
- The furthest airport from Iliamna Airport (ILI) is Port Elizabeth International Airport (PLZ), which is located 10,656 miles (17,149 kilometers) away in Port Elizabeth, South Africa.
- The closest airport to Iliamna Airport (ILI) is Nondalton Airport (NNL), which is located only 16 miles (25 kilometers) N of ILI.
- Because of Iliamna Airport's relatively low elevation of 192 feet, planes can take off or land at Iliamna 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.
Facts about Sidney-Richland Municipal Airport (SDY):
- Scheduled air service temporarily ceased on March 8, 2008, when Big Sky Airlines ended operations in bankruptcy.
- 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.
- 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.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 15.84 miles (25.49 km) N | Nondalton Airport (NNL) | Nondalton, Alaska, United States |     |
| 2 | 22.49 miles (36.19 km) S | Kokhanok Airport (KNK) | Kokhanok, Alaska, United States | |
| 3 | 27.31 miles (43.96 km) E | Pedro Bay Airport (PDB) | Pedro Bay, Alaska, United States | |
| 4 | 29.75 miles (47.88 km) SSW | Big Mountain Air Force Station (BMX) | Big Mountain, Alaska, United States | |
| 5 | 37.25 miles (59.95 km) NNE | Port Alsworth Airport (PTA) | Port Alsworth, Alaska, United States | |
| 6 | 45.67 miles (73.50 km) SW | Igiugig Airport (IGG) | Igiugig, Alaska, United States | |
| 7 | 53.85 miles (86.66 km) S | Kulik Lake Airport (LKK) | Kulik Lake, Bristol Bay Borough, Alaska, United States | |
| 8 | 80.94 miles (130.25 km) WSW | Levelock Airport (KLL) | Levelock, Alaska, United States | |
| 9 | 81.79 miles (131.63 km) W | Koliganek Airport (KGK) | Koliganek, Alaska, United States | |
| 10 | 88.57 miles (142.54 km) WSW | New Stuyahok Airport (KNW) | New Stuyahok, Alaska, United States | |
| 11 | 93.82 miles (150.98 km) WSW | Ekwok Airport (KEK) | Ekwok, Alaska, United States | |
| 12 | 95.54 miles (153.75 km) NNW | Sparrevohn LRRS Airport (SVW) | Sparrevohn, Alaska, United States | |
| 13 | 96.53 miles (155.35 km) SW | King Salmon Airport (AKN) | King Salmon, Alaska, United States | |
| 14 | 102.61 miles (165.14 km) SW | Naknek Airport (NNK) | Naknek, Alaska, United States | |
| 15 | 103.66 miles (166.82 km) SW | South Naknek Airport (WSN) | South Naknek, Alaska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,656.16 miles (17,149.39 km) S | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 2 | 10,653.59 miles (17,145.25 km) S | George Airport (GRJ) | George, South Africa | |
| 3 | 10,631.04 miles (17,108.96 km) SSE | Cape Town International Airport (CPT) | Cape Town, South Africa | |
| 4 | 10,624.74 miles (17,098.81 km) S | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 5 | 10,586.48 miles (17,037.24 km) S | East London Airport (ELS) | East London, South Africa | |
| 6 | 10,480.82 miles (16,867.20 km) S | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 7 | 10,425.55 miles (16,778.26 km) S | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 8 | 10,366.75 miles (16,683.62 km) S | Lebakeng Airport (LEF) | Lebakeng, Lesotho | |
| 9 | 10,365.18 miles (16,681.09 km) S | Semonkong Airport (SOK) | Semonkong, Lesotho | |
| 10 | 10,364.79 miles (16,680.48 km) S | Mafeteng Airport (MFC) | Mafeteng, Lesotho | |
| 11 | 10,358.49 miles (16,670.33 km) S | Lesobeng Airport (LES) | Lesobeng, Lesotho | |
| 12 | 10,341.82 miles (16,643.50 km) S | Pietermaritzburg Airport (PZB) | Pietermaritzburg, South Africa | |
| 13 | 10,340.67 miles (16,641.65 km) S | Moshoeshoe I International Airport (MSU) | Maseru, Lesotho | |
| 14 | 10,335.56 miles (16,633.43 km) S | King Shaka International (DUR) | Durban, KwaZulu-Natal, South Africa | |
| 15 | 10,325.75 miles (16,617.64 km) SSE | Kleinsee Airport (KLZ) | Kleinzee, South Africa | |
| 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 | |