Nonstop flight route between Spearfish, South Dakota, United States and St. Mary's, Alaska, United States:
Departure Airport:
(44°28'49"N by 103°46'59"W)
Arrival Airport:
(62°3'38"N by 163°18'6"W)
Distance from SPF to KSM:
2,621.94 miles (4,219.60 km)
Share this route:
Jump to:
- About this route
- SPF Airport Information
- KSM Airport Information
- Facts about SPF
- Facts about KSM
- Map of Nearest Airports to SPF
- List of Nearest Airports to SPF
- Map of Furthest Airports from SPF
- List of Furthest Airports from SPF
- Map of Nearest Airports to KSM
- List of Nearest Airports to KSM
- Map of Furthest Airports from KSM
- List of Furthest Airports from KSM
About this route:
A direct, nonstop flight between Black Hills Airport (SPF), Spearfish, South Dakota, United States and St. Mary's Airport (KSM), St. Mary's, Alaska, United States would travel a Great Circle distance of 2,622 miles (or 4,220 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 Black Hills Airport and St. Mary's 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 Black Hills Airport and St. Mary's Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | SPF / KSPF |
| Airport Names: |
|
| Location: | Spearfish, South Dakota, United States |
| GPS Coordinates: | 44°28'49"N by 103°46'59"W |
| Operator/Owner: | Lawrence County Airport Board |
| Airport Type: | Public |
| Elevation: | 3931 feet (1,198 meters) |
| # of Runways: | 4 |
| View all routes: | Routes from SPF |
| More Information: | SPF Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | KSM / PASM |
| Airport Name: | St. Mary's Airport |
| Location: | St. Mary's, Alaska, United States |
| GPS Coordinates: | 62°3'38"N by 163°18'6"W |
| Operator/Owner: | Alaska DOT&PF |
| Airport Type: | Public |
| Elevation: | 312 feet (95 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from KSM |
| More Information: | KSM Maps & Info |
Facts about Black Hills Airport (SPF):
- The furthest airport from Black Hills Airport (SPF) is Sir Gaëtan Duval Airport (RRG), which is located 10,576 miles (17,020 kilometers) away in Rodrigues Island, Mauritius.
- In addition to being known as "Black Hills Airport", another name for SPF is "Clyde Ice Field".
- The closest airport to Black Hills Airport (SPF) is Ellsworth Air Force Base (RCA), which is located 42 miles (67 kilometers) ESE of SPF.
- Black Hills Airport (SPF) has 4 runways.
Facts about St. Mary's Airport (KSM):
- St. Mary's Airport (KSM) has 2 runways.
- Because of St. Mary's Airport's relatively low elevation of 312 feet, planes can take off or land at St. Mary's 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 St. Mary's Airport (KSM) is Mountain Village Airport (MOU), which is located only 13 miles (20 kilometers) W of KSM.
- The furthest airport from St. Mary's Airport (KSM) is Cape Town International Airport (CPT), which is located 10,494 miles (16,889 kilometers) away in Cape Town, South Africa.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 41.93 miles (67.49 km) ESE | Ellsworth Air Force Base (RCA) | Rapid City, South Dakota, United States |     |
| 2 | 46.83 miles (75.37 km) SE | Rapid City Regional Airport (RAP) | Rapid City, South Dakota, United States | |
| 3 | 87.15 miles (140.26 km) W | Gillette–Campbell County Airport (GCC) | Gillette, Wyoming, United States | |
| 4 | 118.60 miles (190.86 km) SSE | Chadron Municipal Airport (CDR) | Chadron, Nebraska, United States | |
| 5 | 119.06 miles (191.60 km) SSE | Pine Ridge Airport (XPR) | Pine Ridge, South Dakota, United States | |
| 6 | 119.17 miles (191.79 km) N | Bowman Municipal Airport (BWM) | Bowman, North Dakota, United States | |
| 7 | 141.22 miles (227.28 km) SW | Converse County Airport (DGW) | Douglas, Wyoming, United States | |
| 8 | 158.48 miles (255.04 km) W | Sheridan County Airport (SHR) | Sheridan, Wyoming, United States | |
| 9 | 166.95 miles (268.68 km) NNE | Dickinson Theodore Roosevelt Regional Airport (DIK) | Dickinson, North Dakota, United States | |
| 10 | 167.95 miles (270.29 km) S | Torrington Municipal Airport (TOR) | Torrington, Wyoming, United States | |
| 11 | 168.81 miles (271.67 km) NW | Miles City Airport (MLS) | Miles City, Montana, United States | |
| 12 | 172.45 miles (277.53 km) SW | Casper–Natrona County International AirportCasper Army Airfield (CPR) | Casper, Wyoming, United States | |
| 13 | 172.65 miles (277.86 km) E | Pierre Regional Airport (PIR) | Pierre, South Dakota, United States | |
| 14 | 174.77 miles (281.26 km) SSE | Alliance Municipal Airport (AIA) | Alliance, Nebraska, United States | |
| 15 | 180.33 miles (290.21 km) S | Western Nebraska Regional Airport (BFF) | Scottsbluff, Nebraska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,575.67 miles (17,019.84 km) SSE | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,465.10 miles (16,841.91 km) SE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 3 | 10,445.51 miles (16,810.38 km) SE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 4 | 10,423.12 miles (16,774.35 km) SE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 10,320.60 miles (16,609.36 km) ESE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 6 | 10,254.94 miles (16,503.69 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 7 | 10,231.49 miles (16,465.95 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 8 | 10,215.78 miles (16,440.66 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 9 | 10,207.37 miles (16,427.13 km) ESE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 10 | 10,206.72 miles (16,426.07 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 11 | 10,177.37 miles (16,378.85 km) SE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 12 | 10,162.10 miles (16,354.27 km) W | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 13 | 10,157.15 miles (16,346.31 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 14 | 10,148.92 miles (16,333.06 km) W | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 15 | 10,140.14 miles (16,318.93 km) SE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12.52 miles (20.15 km) W | Mountain Village Airport (MOU) | Mountain Village, Alaska, United States | |
| 2 | 15.71 miles (25.28 km) ESE | Pilot Station Airport (PQS) | Pilot Station, Alaska, United States | |
| 3 | 43.61 miles (70.18 km) ESE | Marshall Don Hunter Sr. Airport (MLL) | Marshall, Alaska, United States | |
| 4 | 58.95 miles (94.87 km) WNW | Sheldon Point Airport (SXP) | Sheldon Point, Alaska, United States | |
| 5 | 61.02 miles (98.20 km) NW | Alakanuk Airport (AUK) | Alakanuk, Alaska, United States | |
| 6 | 62.90 miles (101.24 km) NW | Emmonak Airport (EMK) | Emmonak, Alaska, United States | |
| 7 | 67.40 miles (108.48 km) N | Kotlik Airport (KOT) | Kotlik, Alaska, United States | |
| 8 | 67.43 miles (108.52 km) ESE | Russian Mission Airport (RSH) | Russian Mission, Alaska, United States | |
| 9 | 75.21 miles (121.04 km) W | Scammon Bay Airport (SCM) | Scammon Bay, Alaska, United States | |
| 10 | 83.21 miles (133.91 km) WSW | Chevak Airport (VAK) | Chevak, Alaska, United States | |
| 11 | 84.72 miles (136.35 km) SSE | Nunapitchuk Airport (NUP) | Nunapitchuk, Alaska, United States | |
| 12 | 85.97 miles (138.35 km) SSE | Kasigluk Airport (KUK) | Kasigluk, Alaska, United States | |
| 13 | 88.49 miles (142.42 km) W | Cape Romanzof Air Force Station Cape Romanzof Long Range Radar Site (CZF) | Cape Romanzof, Alaska, United States | |
| 14 | 89.19 miles (143.53 km) SSW | Newtok Airport (WWT) | Newtok, Alaska, United States | |
| 15 | 89.22 miles (143.59 km) SSE | Atmautluak Airport (ATT) | Atmautluak, Alaska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,494.08 miles (16,888.54 km) S | Cape Town International Airport (CPT) | Cape Town, South Africa | |
| 2 | 10,482.44 miles (16,869.80 km) S | George Airport (GRJ) | George, South Africa | |
| 3 | 10,457.83 miles (16,830.21 km) SSW | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 4 | 10,416.76 miles (16,764.12 km) SSW | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 5 | 10,371.90 miles (16,691.92 km) SSW | East London Airport (ELS) | East London, South Africa | |
| 6 | 10,261.64 miles (16,514.46 km) SSW | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 7 | 10,199.66 miles (16,414.71 km) S | Kleinsee Airport (KLZ) | Kleinzee, South Africa | |
| 8 | 10,195.75 miles (16,408.43 km) SSW | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 9 | 10,169.94 miles (16,366.89 km) S | Aggeneys Airport (AGZ) | Aggeneys, South Africa | |
| 10 | 10,169.94 miles (16,366.89 km) S | Wild Coast Sun Airport (MZF) | Mzamba, South Africa | |
| 11 | 10,157.43 miles (16,346.75 km) SSW | Mafeteng Airport (MFC) | Mafeteng, Lesotho | |
| 12 | 10,151.99 miles (16,338.00 km) SSW | Semonkong Airport (SOK) | Semonkong, Lesotho | |
| 13 | 10,149.37 miles (16,333.79 km) SSW | Lebakeng Airport (LEF) | Lebakeng, Lesotho | |
| 14 | 10,143.31 miles (16,324.03 km) SSW | Lesobeng Airport (LES) | Lesobeng, Lesotho | |
| 15 | 10,133.50 miles (16,308.25 km) SE | Teniente Rodolfo Marsh Airport (TNM) | Villa Las Estrellas, Antarctica | |