Nonstop flight route between St. Mary's, Alaska, United States and Yecheon, South Korea:
Departure Airport:
(62°3'38"N by 163°18'6"W)
Arrival Airport:
(36°37'54"N by 128°21'17"E)
Distance from KSM to YEC:
3,333.73 miles (5,365.10 km)
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- About this route
- KSM Airport Information
- YEC Airport Information
- Facts about KSM
- Facts about YEC
- 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 YEC
- List of Nearest Airports to YEC
- Map of Furthest Airports from YEC
- List of Furthest Airports from YEC
About this route:
A direct, nonstop flight between St. Mary's Airport (KSM), St. Mary's, Alaska, United States and Yecheon Air Base (YEC), Yecheon, South Korea would travel a Great Circle distance of 3,334 miles (or 5,365 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 Yecheon Air Base, 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 Yecheon Air Base. 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: | YEC / RKTY |
| Airport Name: | Yecheon Air Base |
| Location: | Yecheon, South Korea |
| GPS Coordinates: | 36°37'54"N by 128°21'17"E |
| Airport Type: | Military |
| Elevation: | 354 feet (108 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from YEC |
| More Information: | YEC Maps & Info |
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.
- 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 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.
- St. Mary's Airport (KSM) has 2 runways.
Facts about Yecheon Air Base (YEC):
- Yecheon Air Base (YEC) currently has only 1 runway.
- The closest airport to Yecheon Air Base (YEC) is Cheongju International Airport (CJJ), which is located 48 miles (77 kilometers) W of YEC.
- Because of Yecheon Air Base's relatively low elevation of 354 feet, planes can take off or land at Yecheon Air Base 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 Yecheon Air Base (YEC) is Capitán de Corbeta Carlos A. Curbelo International Airport (PDP), which is nearly antipodal to Yecheon Air Base (meaning Yecheon Air Base is almost on the exact opposite side of the Earth from Capitán de Corbeta Carlos A. Curbelo International Airport), and is located 12,208 miles (19,646 kilometers) away in Maldonado/Punta del Este, Maldonado, Uruguay.
| 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 | 47.78 miles (76.90 km) W | Cheongju International Airport (CJJ) | Cheong ju, South Korea | |
| 2 | 53.71 miles (86.44 km) SSE | Daegu International Airport (TAE) | Daegu, South Korea | |
| 3 | 59.80 miles (96.24 km) NNW | Wonju Airport (WJU) | Wonju, South Korea | |
| 4 | 74.15 miles (119.34 km) SE | Pohang Airport (KPO) | Pohang, South Korea | |
| 5 | 83.98 miles (135.15 km) NNE | Gangneung Airbase (KAG) | Kangnung (Gangneung), South Korea | |
| 6 | 88.59 miles (142.56 km) NW | Seoul Air Base (SSN) | Seongnam, South Korea | |
| 7 | 105.22 miles (169.34 km) N | Sokcho Airport (SHO) | Sokcho, South Korea | |
| 8 | 105.53 miles (169.84 km) SSE | Gimhae International Airport (PUS) | Busan, South Korea | |
| 9 | 107.37 miles (172.79 km) NW | Gimpo International Airport (GMP) | Seoul, South Korea | |
| 10 | 107.37 miles (172.79 km) NW | Gimpo International Airport (SEL) | Seoul, South Korea | |
| 11 | 107.82 miles (173.52 km) S | Sacheon Airport (HIN) | Sacheon, South Korea | |
| 12 | 109.16 miles (175.68 km) WSW | Gunsan Airport (KUV) | Gunsan, South Korea | |
| 13 | 120.21 miles (193.46 km) WNW | Incheon International Airport (ICN) | Incheon (near Seoul), South Korea | |
| 14 | 135.32 miles (217.78 km) SW | Gwangju Airport (KWJ) | Gwangju (Kwangju), South Korea | |
| 15 | 170.38 miles (274.19 km) SW | Mokpo Airport (MPK) | Mokpo, South Korea | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 12,207.72 miles (19,646.38 km) ESE | Capitán de Corbeta Carlos A. Curbelo International Airport (PDP) | Maldonado/Punta del Este, Maldonado, Uruguay | |
| 2 | 12,161.41 miles (19,571.84 km) ESE | Carrasco/General Cesáreo L. Berisso International Airport (MVD) | Montevideo, Montevideo, Uruguay | |
| 3 | 12,154.29 miles (19,560.38 km) SSE | Treinta y Tres Airport (TYT) | Treinta y Tres, Treinta y Tres, Uruguay | |
| 4 | 12,136.57 miles (19,531.87 km) E | Villa Gesell Airport (VLG) | Villa Gesell, Buenos Aires, Argentina | |
| 5 | 12,121.02 miles (19,506.84 km) S | Rio Grande Regional Airport (RIG) | Rio Grande, Brazil | |
| 6 | 12,106.13 miles (19,482.87 km) SSE | Cerro Largo International Airport (MLZ) | Melo, Cerro Largo, Uruguay | |
| 7 | 12,098.77 miles (19,471.04 km) ESE | Astor Piazzolla International Airport (MDQ) | Mar del Plata, Buenos Aires Province, Argentina | |
| 8 | 12,094.89 miles (19,464.80 km) S | Pelotas International Airport (PET) | Pelotas, Rio Grande do Sul, Brazil | |
| 9 | 12,081.03 miles (19,442.48 km) SE | Santa Bernardina International Airport (DZO) | Durazno, Durazno, Uruguay | |
| 10 | 12,077.97 miles (19,437.56 km) ESE | Miramar Airport (MJR) | Miramar, Buenos Aires, Argentina | |
| 11 | 12,068.37 miles (19,422.11 km) ESE | La Plata Airport (LPG) | La Plata, Buenos Aires, Argentina | |
| 12 | 12,061.15 miles (19,410.49 km) ESE | Laguna de los Patos International Airport (CYR) | Colonia del Sacramento, Colonia, Uruguay | |
| 13 | 12,059.27 miles (19,407.46 km) SSE | Cerro Largo International Airport (VCH) | Vichadero, Rivera, Uruguay | |
| 14 | 12,048.18 miles (19,389.61 km) SSE | Comandante Gustavo Kraemer International Airport (BGX) | Bagé, Rio Grande do Sul, Brazil | |
| 15 | 12,030.68 miles (19,361.46 km) ESE | Ministro Pistarini International Airport (EZE) | Ezeiza (near Buenos Aires), Argentina | |