Nonstop flight route between Alton, Illinois, United States and Decatur, Alabama, United States:
Departure Airport:
(38°53'25"N by 90°2'45"W)
Arrival Airport:
(34°39'15"N by 86°56'43"W)
Distance from ALN to DCU:
339.23 miles (545.94 km)
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Jump to:
- About this route
- ALN Airport Information
- DCU Airport Information
- Facts about ALN
- Facts about DCU
- Map of Nearest Airports to ALN
- List of Nearest Airports to ALN
- Map of Furthest Airports from ALN
- List of Furthest Airports from ALN
- Map of Nearest Airports to DCU
- List of Nearest Airports to DCU
- Map of Furthest Airports from DCU
- List of Furthest Airports from DCU
About this route:
A direct, nonstop flight between St. Louis Regional Airport (ALN), Alton, Illinois, United States and Pryor Field Regional Airport (DCU), Decatur, Alabama, United States would travel a Great Circle distance of 339 miles (or 546 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 relatively short distance between St. Louis Regional Airport and Pryor Field Regional Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | ALN / KALN |
| Airport Name: | St. Louis Regional Airport |
| Location: | Alton, Illinois, United States |
| GPS Coordinates: | 38°53'25"N by 90°2'45"W |
| Area Served: | Alton, Illinois |
| Operator/Owner: | St. Louis Regional |
| Airport Type: | Public |
| Elevation: | 544 feet (166 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from ALN |
| More Information: | ALN Maps & Info |
Arrival Airport Information:
| IATA / ICAO Codes: | DCU / KDCU |
| Airport Name: | Pryor Field Regional Airport |
| Location: | Decatur, Alabama, United States |
| GPS Coordinates: | 34°39'15"N by 86°56'43"W |
| Area Served: | Decatur, Alabama |
| Operator/Owner: | Decatur/Athens Airport Authority |
| Airport Type: | Public |
| Elevation: | 592 feet (180 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from DCU |
| More Information: | DCU Maps & Info |
Facts about St. Louis Regional Airport (ALN):
- The furthest airport from St. Louis Regional Airport (ALN) is Margaret River Airport (MGV), which is located 11,002 miles (17,706 kilometers) away in Margaret River, Western Australia, Australia.
- West Star Aviation is the largest fixed base operations company at the airport.
- Because of St. Louis Regional Airport's relatively low elevation of 544 feet, planes can take off or land at St. Louis Regional 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.
- St. Louis Regional Airport (ALN) has 2 runways.
- Its operations are paid for by an airport taxation district created in 1946, which collects taxes from property owners in the Madison County townships of Alton, Wood River, Foster and Fort Russell.
- The closest airport to St. Louis Regional Airport (ALN) is Lambert–St. Louis International Airport (STL), which is located only 20 miles (32 kilometers) WSW of ALN.
- Civic Memorial Airport opened in 1946 and received its current name in 1984.
Facts about Pryor Field Regional Airport (DCU):
- The closest airport to Pryor Field Regional Airport (DCU) is Huntsville International Airport (HSV), which is located only 10 miles (16 kilometers) E of DCU.
- Pryor Field Regional Airport (DCU) currently has only 1 runway.
- Flying training was performed with Fairchild PT-19s as the primary trainer.
- Because of Pryor Field Regional Airport's relatively low elevation of 592 feet, planes can take off or land at Pryor Field Regional 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.
- Pryor Field Regional Airport is a public airport located three miles northeast of the central business district of Decatur and south of Athens, in Limestone County, Alabama, United States.
- Opened in October 1941 with 4,600 by 4,600 feet square all-direction turf runway.
- The furthest airport from Pryor Field Regional Airport (DCU) is Margaret River Airport (MGV), which is located 11,180 miles (17,992 kilometers) away in Margaret River, Western Australia, Australia.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 19.64 miles (31.61 km) WSW | Lambert–St. Louis International Airport (STL) | St. Louis, Missouri, United States |     |
| 2 | 22.85 miles (36.78 km) SSW | St. Louis Downtown Airport (CPS) | Cahokia, Illinois (near St. Louis), United States | |
| 3 | 26.41 miles (42.50 km) SSE | MidAmerica St. Louis Airport (BLV) | Belleville, Illinois, United States | |
| 4 | 36.08 miles (58.06 km) E | Greenville Airport (GRE) | Greenville, Illinois, United States | |
| 5 | 36.24 miles (58.32 km) WSW | Spirit of St. Louis Airport (SUS) | Chesterfield, Missouri, United States | |
| 6 | 60.74 miles (97.76 km) ESE | Salem–Leckrone Airport (SLO) | Salem, Illinois, United States | |
| 7 | 68.78 miles (110.69 km) NNE | Abraham Lincoln Capital Airport (SPI) | Springfield, Illinois, United States | |
| 8 | 75.13 miles (120.92 km) ESE | Mt. Vernon Airport (MVN) | Mount Vernon, Illinois, United States | |
| 9 | 88.08 miles (141.75 km) SSE | Southern Illinois Airport (MDH) | Carbondale/Murphysboro, Illinois, United States | |
| 10 | 90.73 miles (146.02 km) NE | Decatur Airport (DEC) | Decatur, Illinois, United States | |
| 11 | 95.12 miles (153.07 km) NW | Quincy Regional Airport (UIN) | Quincy, Illinois, United States | |
| 12 | 96.44 miles (155.20 km) SE | Williamson County Regional Airport (MWA) | Marion, Illinois, United States | |
| 13 | 102.97 miles (165.72 km) ENE | Coles County Memorial Airport (MTO) | Mattoon/Charleston, Illinois, United States | |
| 14 | 107.04 miles (172.27 km) WSW | Rolla National Airport (VIH) | Rolla, Missouri, United States | |
| 15 | 115.57 miles (186.00 km) W | Jefferson City Memorial Airport (JEF) | Jefferson City, Missouri, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,002.15 miles (17,706.21 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 10,979.99 miles (17,670.53 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 10,957.22 miles (17,633.90 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 4 | 10,954.58 miles (17,629.65 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 5 | 10,926.12 miles (17,583.85 km) W | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 6 | 10,910.74 miles (17,559.09 km) W | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 7 | 10,901.55 miles (17,544.30 km) W | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 8 | 10,897.24 miles (17,537.37 km) WSW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 9 | 10,880.36 miles (17,510.20 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 10 | 10,861.31 miles (17,479.54 km) WSW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 11 | 10,859.59 miles (17,476.77 km) W | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 12 | 10,841.22 miles (17,447.21 km) WSW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 13 | 10,808.74 miles (17,394.93 km) WSW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 14 | 10,807.95 miles (17,393.67 km) WSW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 15 | 10,799.72 miles (17,380.43 km) WSW | Shark Bay Airport (MJK) | Monkey Mia, Western Australia, Australia | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 9.75 miles (15.69 km) E | Huntsville International Airport (HSV) | Huntsville / Decatur, Alabama, United States | |
| 2 | 14.90 miles (23.98 km) E | Redstone Army Airfield (AAF) (HUA) | Redstone Arsenal (near Huntsville), Alabama, United States | |
| 3 | 35.39 miles (56.96 km) NE | Fayetteville Municipal Airport (FYM) | Fayetteville, Tennessee, United States | |
| 4 | 38.30 miles (61.63 km) W | Northwest Alabama Regional Airport (MSL) | Muscle Shoals, Alabama, United States | |
| 5 | 63.59 miles (102.34 km) NNW | Maury County Airport (MRC) | Columbia/Mount Pleasant, Tennessee, United States | |
| 6 | 63.86 miles (102.77 km) NE | Tullahoma Regional Airport (THA) | Tullahoma, Tennessee, United States | |
| 7 | 67.85 miles (109.19 km) SE | Northeast Alabama Regional Airport (GAD) | Gadsden, Alabama, United States | |
| 8 | 68.70 miles (110.56 km) NNE | Shelbyville Municipal Airport (SYI) | Shelbyville, Tennessee, United States | |
| 9 | 70.49 miles (113.44 km) ENE | Franklin County Airport (UOS) | Sewanee, Tennessee, United States | |
| 10 | 70.57 miles (113.57 km) WSW | Marion County - Rankin Fite Airport (HAB) | Hamilton, Alabama, United States | |
| 11 | 76.14 miles (122.53 km) S | Birmingham-Shuttlesworth International Airport (BHM) | Birmingham, Alabama, United States | |
| 12 | 82.06 miles (132.06 km) ENE | Marion County Airport (APT) | Jasper, Tennessee, United States | |
| 13 | 85.51 miles (137.62 km) SSE | St. Clair County Airport (PLR) | Pell City, Alabama, United States | |
| 14 | 86.47 miles (139.16 km) NNW | Centerville Municipal Airport (GHM) | Centerville, Tennessee, United States | |
| 15 | 90.74 miles (146.03 km) SE | Talladega Municipal Airport (ASN) | Talladega, Alabama, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,179.89 miles (17,992.25 km) W | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 11,160.27 miles (17,960.66 km) W | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 11,140.94 miles (17,929.56 km) W | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 4 | 11,128.73 miles (17,909.90 km) W | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 5 | 11,124.24 miles (17,902.69 km) W | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 6 | 11,122.62 miles (17,900.07 km) W | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 7 | 11,110.85 miles (17,881.13 km) W | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 8 | 11,104.61 miles (17,871.09 km) WSW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 9 | 11,103.33 miles (17,869.03 km) W | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 10 | 11,097.40 miles (17,859.49 km) WSW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 11 | 11,074.48 miles (17,822.60 km) WSW | Shark Bay Airport (MJK) | Monkey Mia, Western Australia, Australia | |
| 12 | 11,050.67 miles (17,784.29 km) WSW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 13 | 11,041.81 miles (17,770.02 km) W | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 14 | 11,035.79 miles (17,760.33 km) W | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 15 | 11,032.55 miles (17,755.12 km) W | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |