Nonstop flight route between Cahokia, Illinois (near St. Louis), United States and Unalakleet, Alaska, United States:
Departure Airport:
(38°34'14"N by 90°9'21"W)
Arrival Airport:
(63°53'17"N by 160°47'56"W)
Distance from CPS to UNK:
3,290.98 miles (5,296.31 km)
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Jump to:
- About this route
- CPS Airport Information
- UNK Airport Information
- Facts about CPS
- Facts about UNK
- Map of Nearest Airports to CPS
- List of Nearest Airports to CPS
- Map of Furthest Airports from CPS
- List of Furthest Airports from CPS
- Map of Nearest Airports to UNK
- List of Nearest Airports to UNK
- Map of Furthest Airports from UNK
- List of Furthest Airports from UNK
About this route:
A direct, nonstop flight between St. Louis Downtown Airport (CPS), Cahokia, Illinois (near St. Louis), United States and Unalakleet Airport (UNK), Unalakleet, Alaska, United States would travel a Great Circle distance of 3,291 miles (or 5,296 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. Louis Downtown Airport and Unalakleet 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. Louis Downtown Airport and Unalakleet Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | CPS / KCPS |
| Airport Name: | St. Louis Downtown Airport |
| Location: | Cahokia, Illinois (near St. Louis), United States |
| GPS Coordinates: | 38°34'14"N by 90°9'21"W |
| Area Served: | Greater St. Louis |
| Operator/Owner: | Bi-State Development Agency |
| Airport Type: | Public |
| Elevation: | 413 feet (126 meters) |
| # of Runways: | 3 |
| View all routes: | Routes from CPS |
| More Information: | CPS Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | UNK / PAUN |
| Airport Name: | Unalakleet Airport |
| Location: | Unalakleet, Alaska, United States |
| GPS Coordinates: | 63°53'17"N by 160°47'56"W |
| Area Served: | Unalakleet, Alaska |
| Operator/Owner: | State of Alaska DOT&PF |
| Airport Type: | Public |
| Elevation: | 21 feet (6 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from UNK |
| More Information: | UNK Maps & Info |
Facts about St. Louis Downtown Airport (CPS):
- The closest airport to St. Louis Downtown Airport (CPS) is Lambert–St. Louis International Airport (STL), which is located only 16 miles (27 kilometers) NW of CPS.
- St. Louis Downtown Airport (CPS) has 3 runways.
- Historic Hangar #2 houses the Greater Saint Louis Air & Space Museum and the airport is still home to the nation's oldest flight school, Parks College of Engineering and Aviation's Center for Aerospace Sciences, which holds CAA Flight School Certificate #1.
- Because of St. Louis Downtown Airport's relatively low elevation of 413 feet, planes can take off or land at St. Louis Downtown 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 airport opened in 1929 as Curtiss-Steinberg Airport.
- The furthest airport from St. Louis Downtown Airport (CPS) is Margaret River Airport (MGV), which is located 10,998 miles (17,700 kilometers) away in Margaret River, Western Australia, Australia.
- Taken over by the United States Army Air Forces on 1 August 1939 as a basic pilot training airfield.
Facts about Unalakleet Airport (UNK):
- The closest airport to Unalakleet Airport (UNK) is Shaktoolik Airport (SKK), which is located 36 miles (58 kilometers) NNW of UNK.
- Because of Unalakleet Airport's relatively low elevation of 21 feet, planes can take off or land at Unalakleet 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 Unalakleet Airport (UNK) is Cape Town International Airport (CPT), which is located 10,369 miles (16,688 kilometers) away in Cape Town, South Africa.
- Unalakleet Airport (UNK) has 2 runways.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 16.47 miles (26.50 km) NW | Lambert–St. Louis International Airport (STL) | St. Louis, Missouri, United States |     |
| 2 | 17.42 miles (28.04 km) E | MidAmerica St. Louis Airport (BLV) | Belleville, Illinois, United States | |
| 3 | 22.85 miles (36.78 km) NNE | St. Louis Regional Airport (ALN) | Alton, Illinois, United States | |
| 4 | 27.50 miles (44.26 km) WNW | Spirit of St. Louis Airport (SUS) | Chesterfield, Missouri, United States | |
| 5 | 45.73 miles (73.59 km) ENE | Greenville Airport (GRE) | Greenville, Illinois, United States | |
| 6 | 64.55 miles (103.88 km) E | Salem–Leckrone Airport (SLO) | Salem, Illinois, United States | |
| 7 | 72.26 miles (116.30 km) ESE | Mt. Vernon Airport (MVN) | Mount Vernon, Illinois, United States | |
| 8 | 73.57 miles (118.39 km) SE | Southern Illinois Airport (MDH) | Carbondale/Murphysboro, Illinois, United States | |
| 9 | 83.94 miles (135.09 km) SE | Williamson County Regional Airport (MWA) | Marion, Illinois, United States | |
| 10 | 91.63 miles (147.46 km) NNE | Abraham Lincoln Capital Airport (SPI) | Springfield, Illinois, United States | |
| 11 | 92.63 miles (149.07 km) WSW | Rolla National Airport (VIH) | Rolla, Missouri, United States | |
| 12 | 98.29 miles (158.19 km) SSE | Cape Girardeau Regional Airport (CGI) | Cape Girardeau, Missouri, United States | |
| 13 | 108.03 miles (173.86 km) W | Jefferson City Memorial Airport (JEF) | Jefferson City, Missouri, United States | |
| 14 | 109.88 miles (176.83 km) NNW | Quincy Regional Airport (UIN) | Quincy, Illinois, United States | |
| 15 | 111.34 miles (179.18 km) NE | Decatur Airport (DEC) | Decatur, Illinois, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,998.38 miles (17,700.14 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 10,976.37 miles (17,664.71 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 10,953.82 miles (17,628.43 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 4 | 10,950.15 miles (17,622.51 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 5 | 10,924.13 miles (17,580.63 km) W | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 6 | 10,908.52 miles (17,555.52 km) W | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 7 | 10,899.45 miles (17,540.92 km) W | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 8 | 10,897.05 miles (17,537.06 km) WSW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 9 | 10,874.80 miles (17,501.25 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 10 | 10,862.63 miles (17,481.67 km) WSW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 11 | 10,855.26 miles (17,469.80 km) W | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 12 | 10,843.70 miles (17,451.20 km) WSW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 13 | 10,809.16 miles (17,395.61 km) WSW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 14 | 10,809.10 miles (17,395.51 km) WSW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 15 | 10,804.00 miles (17,387.31 km) WSW | Shark Bay Airport (MJK) | Monkey Mia, Western Australia, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 35.73 miles (57.51 km) NNW | Shaktoolik Airport (SKK) | Shaktoolik, Alaska, United States | |
| 2 | 48.69 miles (78.35 km) SW | St. Michael Airport (SMK) | St. Michael, Alaska, United States | |
| 3 | 52.08 miles (83.82 km) WSW | Stebbins Airport (WBB) | Stebbins, Alaska, United States | |
| 4 | 66.87 miles (107.62 km) NW | Elim Airport (ELI) | Elim, Alaska, United States | |
| 5 | 68.84 miles (110.79 km) ENE | Kaltag Airport (KAL) | Kaltag, Alaska, United States | |
| 6 | 72.33 miles (116.40 km) SSE | Grayling Airport (KGX) | Grayling, Alaska, United States | |
| 7 | 73.39 miles (118.12 km) N | Koyuk Alfred Adams Airport (KKA) | Koyuk, Alaska, United States | |
| 8 | 80.60 miles (129.71 km) NW | Golovin Airport (GLV) | Golovin, Alaska, United States | |
| 9 | 87.85 miles (141.38 km) SSE | Anvik Airport (ANV) | Anvik, Alaska, United States | |
| 10 | 91.04 miles (146.51 km) SSE | Shageluk Airport (SHX) | Shageluk, Alaska, United States | |
| 11 | 91.32 miles (146.97 km) N | Haycock Airport (HAY) | Haycock, Alaska, United States | |
| 12 | 95.91 miles (154.35 km) NW | White Mountain Airport (WMO) | White Mountain, Alaska, United States | |
| 13 | 100.18 miles (161.22 km) NE | Nulato Airport (NUL) | Nulato, Alaska, United States | |
| 14 | 103.12 miles (165.95 km) SW | Kotlik Airport (KOT) | Kotlik, Alaska, United States | |
| 15 | 105.57 miles (169.90 km) N | Granite Mountain Air Station (GMT) | Granite Mountain, Alaska, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,369.44 miles (16,687.96 km) S | Cape Town International Airport (CPT) | Cape Town, South Africa | |
| 2 | 10,367.72 miles (16,685.18 km) S | George Airport (GRJ) | George, South Africa | |
| 3 | 10,352.62 miles (16,660.88 km) S | Port Elizabeth International Airport (PLZ) | Port Elizabeth, South Africa | |
| 4 | 10,315.27 miles (16,600.78 km) SSW | Port Alfred Airport (AFD) | Port Alfred, South Africa | |
| 5 | 10,273.08 miles (16,532.88 km) SSW | East London Airport (ELS) | East London, South Africa | |
| 6 | 10,164.61 miles (16,358.31 km) SSW | Mthatha Airport (UTT) | Mthatha, South Africa | |
| 7 | 10,139.30 miles (16,317.59 km) ESE | Teniente Rodolfo Marsh Airport (TNM) | Villa Las Estrellas, Antarctica | |
| 8 | 10,103.51 miles (16,259.98 km) SSW | Margate Airport (MGH) | Margate, KwaZulu-Natal, South Africa | |
| 9 | 10,071.64 miles (16,208.69 km) S | Kleinsee Airport (KLZ) | Kleinzee, South Africa | |
| 10 | 10,055.18 miles (16,182.20 km) SSW | Mafeteng Airport (MFC) | Mafeteng, Lesotho | |
| 11 | 10,052.16 miles (16,177.35 km) SSW | Semonkong Airport (SOK) | Semonkong, Lesotho | |
| 12 | 10,051.35 miles (16,176.04 km) SSW | Lebakeng Airport (LEF) | Lebakeng, Lesotho | |
| 13 | 10,045.65 miles (16,166.86 km) S | Wild Coast Sun Airport (MZF) | Mzamba, South Africa | |
| 14 | 10,045.65 miles (16,166.86 km) S | Aggeneys Airport (AGZ) | Aggeneys, South Africa | |
| 15 | 10,044.32 miles (16,164.73 km) SSW | Lesobeng Airport (LES) | Lesobeng, Lesotho | |