Nonstop flight route between Sidney, Montana, United States and Attu Island, Alaska, United States:
Departure Airport:
(47°42'24"N by 104°11'32"W)
Arrival Airport:
(52°49'57"N by 173°10'32"E)
Distance from SDY to ATU:
3,460.83 miles (5,569.66 km)
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Jump to:
- About this route
- SDY Airport Information
- ATU Airport Information
- Facts about SDY
- Facts about ATU
- 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 ATU
- List of Nearest Airports to ATU
- Map of Furthest Airports from ATU
- List of Furthest Airports from ATU
About this route:
A direct, nonstop flight between Sidney-Richland Municipal Airport (SDY), Sidney, Montana, United States and Casco Cove Coast Guard Station (ATU), Attu Island, Alaska, United States would travel a Great Circle distance of 3,461 miles (or 5,570 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 Casco Cove Coast Guard Station, 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 Casco Cove Coast Guard Station. 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: | ATU / PAAT |
| Airport Names: |
|
| Location: | Attu Island, Alaska, United States |
| GPS Coordinates: | 52°49'57"N by 173°10'32"E |
| Operator/Owner: | U.S. Coast Guard 17th Dist. |
| Airport Type: | Private use |
| Elevation: | 88 feet (27 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from ATU |
| More Information: | ATU Maps & Info |
Facts about Sidney-Richland Municipal Airport (SDY):
- As per the Federal Aviation Administration, this airport had 2,031 passenger boardings in calendar year 2008, 2,766 in 2009, and 3,659 in 2010.
- Sidney-Richland Municipal Airport covers an area of 335 acres at an elevation of 1,985 feet above mean sea level.
- 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.
Facts about Casco Cove Coast Guard Station (ATU):
- The closest airport to Casco Cove Coast Guard Station (ATU) is Eareckson Air Station (SYA), which is located 40 miles (65 kilometers) ESE of ATU.
- In addition to being known as "Casco Cove Coast Guard Station", other names for ATU include "LORAN Station Attu" and "(former Naval Air Facility Attu)".
- The island is protected as part of the National Parks Trust territory and few people visit the island or area, as it is restricted.
- Casco Cove is one of the most isolated and remote airports in the United States.
- Casco Cove Coast Guard Station (ATU) currently has only 1 runway.
- Because of Casco Cove Coast Guard Station's relatively low elevation of 88 feet, planes can take off or land at Casco Cove Coast Guard Station 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 furthest airport from Casco Cove Coast Guard Station (ATU) is Cape Town International Airport (CPT), which is located 10,631 miles (17,109 kilometers) away in Cape Town, 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 | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 40.08 miles (64.50 km) ESE | Eareckson Air Station (SYA) | Shemya, Alaska, United States | |
| 2 | 434.18 miles (698.74 km) E | Adak Airport (ADK) | Adak Island, Alaska, United States | |
| 3 | 531.42 miles (855.23 km) E | Atka Airport (AKB) | Atka, Alaska, United States | |
| 4 | 611.52 miles (984.14 km) W | Yelizovo Airport (PKC) | Petropavlovsk-Kamchatsky, Russia | |
| 5 | 720.55 miles (1,159.60 km) ENE | St. Paul Island Airport (SNP) | St. Paul Island, Alaska, United States | |
| 6 | 729.92 miles (1,174.68 km) ENE | St. George Airport (STG) | St. George, Alaska, United States | |
| 7 | 747.48 miles (1,202.95 km) E | Nikolski Air Station (IKO) | Nikolski, Alaska, United States | |
| 8 | 823.34 miles (1,325.04 km) N | Markovo Airport (KVM) | Markovo, Chukotka Autonomous Okrug, Russia | |
| 9 | 836.44 miles (1,346.12 km) ENE | Unalaska Airport (DUT) | Unalaska, Alaska, United States | |
| 10 | 837.95 miles (1,348.54 km) N | Ugolny Airport (DYR) | Anadyr, Russia | |
| 11 | 866.70 miles (1,394.82 km) ENE | Akutan Seaplane Base (KQA) | Akutan, Alaska, United States | |
| 12 | 928.25 miles (1,493.87 km) NNE | Gambell Airport (GAM) | Gambell, Alaska, United States | |
| 13 | 931.23 miles (1,498.67 km) NNE | Provideniya Bay Airport (PVS) | Provideniya, Chukotka, Russia | |
| 14 | 933.22 miles (1,501.86 km) NE | Mekoryuk Airport (MYU) | Mekoryuk, Alaska, United States | |
| 15 | 950.66 miles (1,529.94 km) NNE | Savoonga Airport (SVA) | Savoonga, Alaska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,631.23 miles (17,109.27 km) SW | Cape Town International Airport (CPT) | Cape Town, South Africa | |
| 2 | 10,501.26 miles (16,900.10 km) WSW | George Airport (GRJ) | George, South Africa | |
| 3 | 10,458.69 miles (16,831.59 km) SE | Teniente Rodolfo Marsh Airport (TNM) | Villa Las Estrellas, Antarctica | |
| 4 | 10,431.40 miles (16,787.68 km) SW | Kleinsee Airport (KLZ) | Kleinzee, South Africa | |
| 5 | 10,381.55 miles (16,707.44 km) WSW | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 6 | 10,381.37 miles (16,707.15 km) SW | Alexander Bay Airport (ALJ) | Alexander Bay, South Africa | |
| 7 | 10,354.51 miles (16,663.93 km) SW | Aggeneys Airport (AGZ) | Aggeneys, South Africa | |
| 8 | 10,354.51 miles (16,663.92 km) SW | Wild Coast Sun Airport (MZF) | Mzamba, South Africa | |
| 9 | 10,326.08 miles (16,618.18 km) ESE | Port Stanley Airport (PSY) | Stanley, Falkland Islands, United Kingdom | |
| 10 | 10,311.35 miles (16,594.46 km) WSW | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 11 | 10,303.30 miles (16,581.51 km) ESE | RAF Mount Pleasant (MPN) | Falkland Islands | |
| 12 | 10,302.39 miles (16,580.04 km) SW | Lüderitz Airport (LUD) | Luderitz, Namibia | |
| 13 | 10,282.92 miles (16,548.71 km) SW | Karasburg Airport (KAS) | Karasburg, Namibia | |
| 14 | 10,248.62 miles (16,493.52 km) WSW | East London Airport (ELS) | East London, South Africa | |
| 15 | 10,224.59 miles (16,454.85 km) SW | Upington Airport (UTN) | Upington, South Africa | |