Nonstop flight route between Reading, Pennsylvania, United States and Alton, Illinois, United States:
Departure Airport:
(40°22'42"N by 75°57'55"W)
Arrival Airport:
(38°53'25"N by 90°2'45"W)
Distance from RDG to ALN:
755.45 miles (1,215.78 km)
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Jump to:
- About this route
- RDG Airport Information
- ALN Airport Information
- Facts about RDG
- Facts about ALN
- Map of Nearest Airports to RDG
- List of Nearest Airports to RDG
- Map of Furthest Airports from RDG
- List of Furthest Airports from RDG
- Map of Nearest Airports to ALN
- List of Nearest Airports to ALN
- Map of Furthest Airports from ALN
- List of Furthest Airports from ALN
About this route:
A direct, nonstop flight between Reading Regional Airport (RDG), Reading, Pennsylvania, United States and St. Louis Regional Airport (ALN), Alton, Illinois, United States would travel a Great Circle distance of 755 miles (or 1,216 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 Reading Regional Airport and St. Louis Regional Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | RDG / KRDG |
| Airport Names: |
|
| Location: | Reading, Pennsylvania, United States |
| GPS Coordinates: | 40°22'42"N by 75°57'55"W |
| Area Served: | Reading, Pennsylvania |
| Operator/Owner: | Reading Regional Airport Authority |
| Airport Type: | Public |
| Elevation: | 344 feet (105 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from RDG |
| More Information: | RDG Maps & Info |
Arrival 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 |
Facts about Reading Regional Airport (RDG):
- The closest airport to Reading Regional Airport (RDG) is Heritage Field (PTW), which is located 24 miles (38 kilometers) ESE of RDG.
- Reading Regional Airport (RDG) has 2 runways.
- In the 1950s Reading Air Services sponsored the National Maintenance & Operations Meeting, better known as the Reading Airshow, and later Reading Aerofest.
- Because of Reading Regional Airport's relatively low elevation of 344 feet, planes can take off or land at Reading 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.
- Aircraft used for training were the Curtiss O-52 Owl.
- In addition to being known as "Reading Regional Airport", another name for RDG is "Carl A. Spaatz FieldReading Army Airfield".
- The furthest airport from Reading Regional Airport (RDG) is Margaret River Airport (MGV), which is located 11,683 miles (18,802 kilometers) away in Margaret River, Western Australia, Australia.
Facts about St. Louis Regional Airport (ALN):
- 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.
- 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.
- 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.
- 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.
- St. Louis Regional Airport (ALN) has 2 runways.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 23.58 miles (37.95 km) ESE | Heritage Field (PTW) | Pottstown, Pennsylvania, United States |     |
| 2 | 24.80 miles (39.91 km) SW | Lancaster Airport (LNS) | Lancaster, Pennsylvania, United States | |
| 3 | 28.12 miles (45.25 km) S | Chester County G. O. Carlson Airport (CTH) | Coatesville, Pennsylvania, United States | |
| 4 | 31.04 miles (49.95 km) E | Quakertown Airport (UKT) | Quakertown, Pennsylvania, United States | |
| 5 | 32.01 miles (51.51 km) W | Muir Army Airfield (MUI) | Fort Indiantown Gap, Pennsylvania, United States | |
| 6 | 33.43 miles (53.80 km) NE | Lehigh Valley International Airport (ABE) | Allentown, Pennsylvania, United States | |
| 7 | 33.62 miles (54.11 km) SE | Brandywine Airport (OQN) | West Chester, Pennsylvania, United States | |
| 8 | 40.51 miles (65.19 km) ESE | Wings Field (BBX) | Blue Bell, Pennsylvania, United States | |
| 9 | 42.04 miles (67.66 km) N | Hazleton Municipal Airport (HZL) | Hazleton, Pennsylvania, United States | |
| 10 | 43.97 miles (70.77 km) WSW | Harrisburg International Airport (MDT) | Harrisburg, Pennsylvania, United States | |
| 11 | 44.51 miles (71.64 km) E | Doylestown Airport (DYL) | Doylestown, Pennsylvania, United States | |
| 12 | 44.80 miles (72.10 km) ESE | NAS JRB Willow Grove (NXX) | Willow Grove, Pennsylvania, United States | |
| 13 | 48.01 miles (77.26 km) WSW | Capital City Airport (HAR) | Harrisburg, Pennsylvania, United States | |
| 14 | 50.17 miles (80.74 km) SE | Philadelphia Seaplane BaseChandler Field (PSQ) | Essington, Pennsylvania, United States | |
| 15 | 51.86 miles (83.46 km) SE | Philadelphia International Airport (PHL) | Philadelphia, Pennsylvania, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,682.92 miles (18,801.79 km) WSW | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 11,658.95 miles (18,763.21 km) WSW | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 11,649.98 miles (18,748.78 km) WSW | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 4 | 11,633.01 miles (18,721.46 km) WSW | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 5 | 11,596.30 miles (18,662.39 km) WSW | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 6 | 11,574.38 miles (18,627.12 km) SW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 7 | 11,564.62 miles (18,611.41 km) SW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 8 | 11,556.71 miles (18,598.68 km) WSW | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 9 | 11,553.43 miles (18,593.39 km) SW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 10 | 11,505.41 miles (18,516.11 km) SW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 11 | 11,434.00 miles (18,401.20 km) SW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 12 | 11,409.71 miles (18,362.11 km) SW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 13 | 11,387.67 miles (18,326.63 km) SW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 14 | 11,384.39 miles (18,321.36 km) SW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 15 | 11,354.77 miles (18,273.69 km) WSW | Esperance Airport (EPR) | Esperance, 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 | |