Nonstop flight route between Johnston Atoll, U.S. Minor Outlying Islands and St. Mary's, Alaska, United States:
Departure Airport:
(16°43'42"N by 169°32'3"W)
Arrival Airport:
(62°3'38"N by 163°18'6"W)
Distance from JON to KSM:
3,146.89 miles (5,064.41 km)
Share this route:
Jump to:
- About this route
- JON Airport Information
- KSM Airport Information
- Facts about JON
- Facts about KSM
- Map of Nearest Airports to JON
- List of Nearest Airports to JON
- Map of Furthest Airports from JON
- List of Furthest Airports from JON
- 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 Johnston Atoll Airport (JON), Johnston Atoll, U.S. Minor Outlying Islands and St. Mary's Airport (KSM), St. Mary's, Alaska, United States would travel a Great Circle distance of 3,147 miles (or 5,064 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 Johnston Atoll 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 Johnston Atoll 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: | JON / PJON |
| Airport Name: | Johnston Atoll Airport |
| Location: | Johnston Atoll, U.S. Minor Outlying Islands |
| GPS Coordinates: | 16°43'42"N by 169°32'3"W |
| Airport Type: | Public |
| Elevation: | 7 feet (2 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from JON |
| More Information: | JON 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 Johnston Atoll Airport (JON):
- Because of Johnston Atoll Airport's relatively low elevation of 7 feet, planes can take off or land at Johnston Atoll 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 Johnston Atoll Airport (JON) is PMRF Barking Sands (BKH), which is located 733 miles (1,179 kilometers) ENE of JON.
- The furthest airport from Johnston Atoll Airport (JON) is Lubango Mukanka Airport (SDD), which is nearly antipodal to Johnston Atoll Airport (meaning Johnston Atoll Airport is almost on the exact opposite side of the Earth from Lubango Mukanka Airport), and is located 12,195 miles (19,627 kilometers) away in Lubango, Angola.
- Johnston Atoll Airport (JON) currently has only 1 runway.
- In July 1942 the civilian contractors at the atoll were replaced by 500 men from the 5th and 10th Naval Construction Battalions, who expanded the fuel storage and water production at the base and built additional facilities.
Facts about St. Mary's Airport (KSM):
- 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.
- 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.
- 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.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 732.87 miles (1,179.44 km) ENE | PMRF Barking Sands (BKH) | Kekaha, Hawaii, United States |     |
| 2 | 739.15 miles (1,189.55 km) ENE | Port Allen Airport (PAK) | Hanapepe, Hawaii, United States | |
| 3 | 756.72 miles (1,217.82 km) ENE | Lihue Airport (LIH) | Lihue, Hawaii, United States | |
| 4 | 758.11 miles (1,220.05 km) ENE | Princeville Airport (HPV) | Hanalei, Hawaii, United States | |
| 5 | 811.92 miles (1,306.65 km) ENE | Dillingham Airfield (HDH) | Mokuleia, Hawaii, United States | |
| 6 | 812.55 miles (1,307.67 km) ENE | Kalaeloa Airport (NAX) | Kapolei, Hawaii, United States | |
| 7 | 818.84 miles (1,317.80 km) ENE | Wheeler AAF (HHI) | Wahiawa, Hawaii, United States | |
| 8 | 821.72 miles (1,322.43 km) ENE | Hickam Field (HIK) | Honolulu, Hawaii, United States | |
| 9 | 821.72 miles (1,322.43 km) ENE | Honolulu International Airport (HNL) | Honolulu, Hawaii, United States | |
| 10 | 868.00 miles (1,396.91 km) ENE | Molokai Airport (MKK) | Kaunakakai, Hawaii, United States | |
| 11 | 869.25 miles (1,398.91 km) ENE | Lanai Airport (LNY) | Lanai City, Hawaii, United States | |
| 12 | 876.78 miles (1,411.04 km) ENE | Kalaupapa Airport (LUP) | Kalaupapa, Hawaii, United States | |
| 13 | 890.00 miles (1,432.31 km) ENE | Kapalua Airport (JHM) | Lahaina, Hawaii, United States | |
| 14 | 903.71 miles (1,454.38 km) ENE | Kahului Airport (OGG) | Kahului, Hawaii, United States | |
| 15 | 908.96 miles (1,462.82 km) ENE | Kona International Airport at Keāhole (KOA) | Kailua / Kona, Hawaii, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12,195.43 miles (19,626.59 km) WSW | Lubango Mukanka Airport (SDD) | Lubango, Angola | |
| 2 | 12,139.12 miles (19,535.97 km) W | Vila Roçadas/Xangongo Airport (XGN) | Xangongo, Angola | |
| 3 | 12,091.02 miles (19,458.56 km) SW | Benguela Airport (BUG) | Benguela, Angola | |
| 4 | 12,011.89 miles (19,331.22 km) WSW | Halali Airport (HAL) | Halali, Namibia | |
| 5 | 11,991.37 miles (19,298.19 km) SW | Albano Machado (Huambo) Airport (NOV) | Huambo, Angola | |
| 6 | 11,956.55 miles (19,242.15 km) SW | Waku Kungo Airport/Cela (CEO) | Waco Kungo, Angola | |
| 7 | 11,943.67 miles (19,221.43 km) SW | Arandis Airport (ADI) | Arandis / Swakopmund, Namibia | |
| 8 | 11,926.69 miles (19,194.10 km) SSW | Walvis Bay Airport (WVB) | Walvis Bay, Namibia | |
| 9 | 11,896.45 miles (19,145.44 km) WSW | Grootfontein Airport (GFY) | Grootfontein, Namibia | |
| 10 | 11,882.79 miles (19,123.46 km) SW | Aeroporto de Andulo (ANL) | Andulo, Angola | |
| 11 | 11,862.02 miles (19,090.02 km) SSW | Quatro de Fevereiro International Airport (LAD) | Luanda, Angola | |
| 12 | 11,849.37 miles (19,069.67 km) W | Cuito Cuanavale Airport (CTI) | Cuito Cuanavale, Angola | |
| 13 | 11,845.00 miles (19,062.64 km) SW | Eros Airport (ERS) | Windhoek, Namibia | |
| 14 | 11,832.32 miles (19,042.23 km) SW | Hosea Kutako International Airport (WDH) | Windhoek, Namibia | |
| 15 | 11,820.71 miles (19,023.54 km) W | Rundu Airport (NDU) | Rundu, Okavango Region, Namibia | |
| 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 | |