Nonstop flight route between St. Mary's, Alaska, United States and Riverton, Wyoming, United States:
Departure Airport:
(62°3'38"N by 163°18'6"W)
Arrival Airport:
(43°3'51"N by 108°27'34"W)
Distance from KSM to RIW:
2,545.21 miles (4,096.11 km)
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Jump to:
- About this route
- KSM Airport Information
- RIW Airport Information
- Facts about KSM
- Facts about RIW
- Map of Nearest Airports to KSM
- List of Nearest Airports to KSM
- Map of Furthest Airports from KSM
- List of Furthest Airports from KSM
- Map of Nearest Airports to RIW
- List of Nearest Airports to RIW
- Map of Furthest Airports from RIW
- List of Furthest Airports from RIW
About this route:
A direct, nonstop flight between St. Mary's Airport (KSM), St. Mary's, Alaska, United States and Riverton Regional Airport (RIW), Riverton, Wyoming, United States would travel a Great Circle distance of 2,545 miles (or 4,096 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 St. Mary's Airport and Riverton Regional 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 St. Mary's Airport and Riverton Regional Airport. You'll see that it will travel the same route of the red line on this map!
Departure 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 |
Arrival Airport Information:
| IATA / ICAO Codes: | RIW / KRIW |
| Airport Name: | Riverton Regional Airport |
| Location: | Riverton, Wyoming, United States |
| GPS Coordinates: | 43°3'51"N by 108°27'34"W |
| Area Served: | Riverton, Wyoming |
| Operator/Owner: | City of Riverton |
| Airport Type: | Public |
| Elevation: | 5528 feet (1,685 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from RIW |
| More Information: | RIW Maps & Info |
Facts about St. Mary's Airport (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.
- 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.
- 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.
Facts about Riverton Regional Airport (RIW):
- Because of Riverton Regional Airport's high elevation of 5,528 feet, planes must typically fly at a faster airspeed in order to takeoff or land at RIW. Combined with a high temperature, this could make RIW a "Hot & High" airport, where the air density is lower than it would otherwise be at sea level.
- Riverton Regional Airport covers an area of 1,250 acres at an elevation of 5,528 feet above mean sea level.
- The closest airport to Riverton Regional Airport (RIW) is Hunt Field (LND), which is located 22 miles (35 kilometers) SW of RIW.
- The furthest airport from Riverton Regional Airport (RIW) is Sir Gaëtan Duval Airport (RRG), which is located 10,758 miles (17,313 kilometers) away in Rodrigues Island, Mauritius.
- Riverton Regional Airport (RIW) has 2 runways.
| 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 | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 21.90 miles (35.25 km) SW | Hunt Field (LND) | Lander, Wyoming, United States | |
| 2 | 67.12 miles (108.03 km) NNE | Worland Municipal Airport (WRL) | Worland, Wyoming, United States | |
| 3 | 70.65 miles (113.70 km) WSW | Ralph Wenz Field (PWY) | Pinedale, Wyoming, United States | |
| 4 | 89.99 miles (144.83 km) WSW | Miley Memorial Field (BPI) | Big Piney, Wyoming, United States | |
| 5 | 101.42 miles (163.22 km) E | Casper–Natrona County International AirportCasper Army Airfield (CPR) | Casper, Wyoming, United States | |
| 6 | 104.47 miles (168.12 km) NNW | Yellowstone Regional Airport (COD) | Cody, Wyoming, United States | |
| 7 | 106.17 miles (170.87 km) SSW | Rock Springs–Sweetwater County Airport (RKS) | Rock Springs, Wyoming, United States | |
| 8 | 108.11 miles (173.99 km) SE | Rawlins Municipal Airport (RWL) | Rawlins, Wyoming, United States | |
| 9 | 120.47 miles (193.88 km) WNW | Jackson Hole Airport (JAC) | Jackson, Wyoming, United States | |
| 10 | 128.05 miles (206.07 km) W | Afton Municipal Airport (AFO) | Afton, Wyoming, United States | |
| 11 | 137.01 miles (220.50 km) SW | Kemmerer Municipal Airport (EMM) | Kemmerer, Wyoming, United States | |
| 12 | 138.92 miles (223.57 km) NNE | Sheridan County Airport (SHR) | Sheridan, Wyoming, United States | |
| 13 | 139.71 miles (224.84 km) SE | Shively Field (SAA) | Saratoga, Wyoming, United States | |
| 14 | 156.58 miles (252.00 km) E | Converse County Airport (DGW) | Douglas, Wyoming, United States | |
| 15 | 170.73 miles (274.76 km) ENE | Gillette–Campbell County Airport (GCC) | Gillette, Wyoming, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,757.85 miles (17,313.05 km) SSE | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,679.24 miles (17,186.53 km) SSE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 3 | 10,670.61 miles (17,172.64 km) SE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 4 | 10,646.95 miles (17,134.56 km) SE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 10,570.44 miles (17,011.44 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 6 | 10,458.70 miles (16,831.61 km) ESE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 7 | 10,420.60 miles (16,770.29 km) SE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 8 | 10,385.71 miles (16,714.13 km) SE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 10,281.40 miles (16,546.27 km) SE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 10 | 10,271.67 miles (16,530.62 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 11 | 10,264.17 miles (16,518.54 km) ESE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 12 | 10,252.06 miles (16,499.05 km) SE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 13 | 10,250.08 miles (16,495.86 km) ESE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 14 | 10,236.11 miles (16,473.38 km) SE | Sainte Marie Airport (SMS) | Île Sainte-Marie, Madagascar | |
| 15 | 10,217.30 miles (16,443.11 km) SE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |