Nonstop flight route between Arlington County, Virginia (near Washington, D.C.), United States and Sidney, Montana, United States:
Departure Airport:
(38°51'7"N by 77°2'16"W)
Arrival Airport:
(47°42'24"N by 104°11'32"W)
Distance from DCA to SDY:
1,486.56 miles (2,392.39 km)
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Jump to:
- About this route
- DCA Airport Information
- SDY Airport Information
- Facts about DCA
- Facts about SDY
- Map of Nearest Airports to DCA
- List of Nearest Airports to DCA
- Map of Furthest Airports from DCA
- List of Furthest Airports from DCA
- 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 Ronald Reagan Washington National Airport (DCA), Arlington County, Virginia (near Washington, D.C.), United States and Sidney-Richland Municipal Airport (SDY), Sidney, Montana, United States would travel a Great Circle distance of 1,487 miles (or 2,392 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 Ronald Reagan Washington National 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: | DCA / KDCA |
| Airport Name: | Ronald Reagan Washington National Airport |
| Location: | Arlington County, Virginia (near Washington, D.C.), United States |
| GPS Coordinates: | 38°51'7"N by 77°2'16"W |
| Area Served: | Washington Metropolitan Area |
| Operator/Owner: | Metropolitan Washington Airports Authority |
| Airport Type: | Public |
| Elevation: | 15 feet (5 meters) |
| # of Runways: | 3 |
| View all routes: | Routes from DCA |
| More Information: | DCA 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 Ronald Reagan Washington National Airport (DCA):
- Because of Ronald Reagan Washington National Airport's relatively low elevation of 15 feet, planes can take off or land at Ronald Reagan Washington National 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.
- Ronald Reagan Washington National Airport (DCA) has 3 runways.
- Despite the expansions, efforts have been made to restrict the growth of the airport.
- Terminal A opened in 1941 and was expanded in 1955 to accommodate more passengers and airlines.
- Prior to the September 11 attacks in 2001, the notable security measure was the southbound approach into the airport.
- The closest airport to Ronald Reagan Washington National Airport (DCA) is Bolling Air Force Base (BOF), which is located only 1 miles (2 kilometers) ESE of DCA.
- The airport opened June 16, 1941.
- The furthest airport from Ronald Reagan Washington National Airport (DCA) is Margaret River Airport (MGV), which is located 11,682 miles (18,800 kilometers) away in Margaret River, Western Australia, Australia.
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.
- 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.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 1.34 miles (2.15 km) ESE | Bolling Air Force Base (BOF) | Washington, D.C., United States |     |
| 2 | 9.63 miles (15.50 km) ESE | Andrews Field (ADW) | Camp Springs, Maryland, United States | |
| 3 | 10.83 miles (17.42 km) NE | College Park Airport (CGS) | College Park, Maryland, United States | |
| 4 | 12.23 miles (19.68 km) SW | Davison Army Airfield (DAA) | Fort Belvoir, Virginia, United States | |
| 5 | 21.97 miles (35.36 km) NE | Tipton Airport (FME) | Odenton, Maryland, United States | |
| 6 | 22.90 miles (36.85 km) NNW | Montgomery County Airpark (GAI) | Gaithersburg, Maryland, United States | |
| 7 | 23.37 miles (37.60 km) WNW | Washington Dulles International Airport (IAD) | Washington, D.C. / Virginia, United States | |
| 8 | 26.01 miles (41.86 km) ENE | Lee Airport (ANP) | Annapolis, Maryland, United States | |
| 9 | 27.27 miles (43.89 km) WSW | Manassas Regional Airport (HEF) | Manassas, Virginia, United States | |
| 10 | 27.27 miles (43.89 km) WSW | Manassas Regional Airport (MNZ) | Manassas, Virginia, United States | |
| 11 | 29.86 miles (48.05 km) NE | Baltimore/Washington International Thurgood Marshall Airport (BWI) | between Baltimore, Maryland and Washington, D.C., United States | |
| 12 | 31.98 miles (51.47 km) WNW | Leesburg Executive Airport (JYO) | Leesburg, Virginia, United States | |
| 13 | 43.02 miles (69.24 km) NNW | Frederick Municipal Airport (FDK) | Frederick, Maryland, United States | |
| 14 | 45.50 miles (73.23 km) SE | St. Mary's County Regional Airport (LTW) | Leonardtown, Maryland, United States | |
| 15 | 46.79 miles (75.30 km) NE | Martin State Airport (MTN) | Baltimore, Maryland, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,681.77 miles (18,799.93 km) WSW | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 11,658.39 miles (18,762.32 km) WSW | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 11,640.72 miles (18,733.87 km) WSW | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 4 | 11,633.68 miles (18,722.55 km) WSW | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 5 | 11,586.54 miles (18,646.68 km) WSW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 6 | 11,574.33 miles (18,627.04 km) WSW | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 7 | 11,574.29 miles (18,626.97 km) WSW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 8 | 11,563.78 miles (18,610.06 km) WSW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 9 | 11,545.69 miles (18,580.94 km) WSW | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 10 | 11,531.56 miles (18,558.20 km) SW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 11 | 11,470.35 miles (18,459.69 km) SW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 12 | 11,436.80 miles (18,405.70 km) SW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 13 | 11,428.31 miles (18,392.03 km) SW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 14 | 11,421.14 miles (18,380.50 km) SW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 15 | 11,349.87 miles (18,265.79 km) SW | Shark Bay Airport (MJK) | Monkey Mia, 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 | |