Nonstop flight route between Ludington, Michigan, United States and Alton, Illinois, United States:
Departure Airport:
(43°57'44"N by 86°24'28"W)
Arrival Airport:
(38°53'25"N by 90°2'45"W)
Distance from LDM to ALN:
397.83 miles (640.24 km)
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Jump to:
- About this route
- LDM Airport Information
- ALN Airport Information
- Facts about LDM
- Facts about ALN
- Map of Nearest Airports to LDM
- List of Nearest Airports to LDM
- Map of Furthest Airports from LDM
- List of Furthest Airports from LDM
- 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 Mason County Airport (LDM), Ludington, Michigan, United States and St. Louis Regional Airport (ALN), Alton, Illinois, United States would travel a Great Circle distance of 398 miles (or 640 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 Mason County 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: | LDM / KLDM |
| Airport Name: | Mason County Airport |
| Location: | Ludington, Michigan, United States |
| GPS Coordinates: | 43°57'44"N by 86°24'28"W |
| Area Served: | Ludington |
| Operator/Owner: | Mason County |
| Airport Type: | Public |
| Elevation: | 646 feet (197 meters) |
| # of Runways: | 2 |
| View all routes: | Routes from LDM |
| More Information: | LDM 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 Mason County Airport (LDM):
- Mason County Airport (LDM) has 2 runways.
- Because of Mason County Airport's relatively low elevation of 646 feet, planes can take off or land at Mason County 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 Mason County Airport (LDM) is Margaret River Airport (MGV), which is located 11,095 miles (17,856 kilometers) away in Margaret River, Western Australia, Australia.
- The closest airport to Mason County Airport (LDM) is Manistee County Blacker Airport (MBL), which is located 23 miles (37 kilometers) NNE of LDM.
Facts about St. Louis Regional Airport (ALN):
- St. Louis Regional Airport (ALN) has 2 runways.
- Civic Memorial Airport opened in 1946 and received its current name in 1984.
- 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.
- In the spring of 2004 the airport was at the center of a scandal.
- 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.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 22.86 miles (36.78 km) NNE | Manistee County Blacker Airport (MBL) | Manistee, Michigan, United States |     |
| 2 | 44.55 miles (71.70 km) E | Nartron Field (RCT) | Reed City, Michigan, United States | |
| 3 | 47.99 miles (77.23 km) ESE | Roben-Hood Airport (WBR) | Big Rapids, Michigan, United States | |
| 4 | 53.60 miles (86.26 km) ENE | Wexford County Airport (CAD) | Cadillac, Michigan, United States | |
| 5 | 55.58 miles (89.45 km) S | Muskegon County Airport (MKG) | Muskegon, Michigan, United States | |
| 6 | 64.25 miles (103.39 km) W | Manitowoc County Airport (MTW) | Manitowoc, Wisconsin, United States | |
| 7 | 67.54 miles (108.70 km) NE | Cherry Capital Airport (TVC) | Traverse City, Michigan, United States | |
| 8 | 73.15 miles (117.72 km) W | Sheboygan County Memorial Airport (SBM) | Sheboygan, Wisconsin, United States | |
| 9 | 78.81 miles (126.83 km) NW | Door County Cherryland Airport (SUE) | Sturgeon Bay, Wisconsin, United States | |
| 10 | 81.55 miles (131.24 km) S | Park Township Airport (HLM) | Holland, Michigan, United States | |
| 11 | 86.57 miles (139.32 km) ESE | Mount Pleasant Municipal Airport (MOP) | Mount Pleasant, Michigan, United States | |
| 12 | 86.94 miles (139.91 km) SSE | Gerald R. Ford International Airport (GRR) | Grand Rapids, Michigan, United States | |
| 13 | 90.35 miles (145.40 km) ENE | Roscommon County - Blodgett Memorial Airport (HTL) | Houghton Lake, Michigan, United States | |
| 14 | 92.58 miles (148.99 km) WNW | Austin Straubel International Airport (GRB) | Green Bay, Wisconsin, United States | |
| 15 | 92.64 miles (149.08 km) NE | Antrim County Airport (ACB) | Bellaire, Michigan, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,095.20 miles (17,855.95 km) WSW | Margaret River Airport (MGV) | Margaret River, Western Australia, Australia | |
| 2 | 11,071.31 miles (17,817.49 km) WSW | Busselton Regional Airport (BQB) | Busselton, Western Australia, Australia | |
| 3 | 11,061.27 miles (17,801.34 km) WSW | Manjimup Airport (MJP) | Manjimup, Western Australia, Australia | |
| 4 | 11,045.60 miles (17,776.13 km) WSW | Bunbury Airport (BUY) | Bunbury, Western Australia, Australia | |
| 5 | 11,009.59 miles (17,718.18 km) WSW | Albany Airport (ALH) | Albany, Western Australia, Australia | |
| 6 | 10,991.27 miles (17,688.70 km) WSW | Rottnest Airport (RTS) | Rottnest Island, Western Australia, Australia | |
| 7 | 10,980.26 miles (17,670.98 km) WSW | Jandakot Airport (JAD) | Jandakot, Western Australia, Australia | |
| 8 | 10,969.36 miles (17,653.44 km) WSW | Perth Airport (PER) | Perth, Western Australia, Australia | |
| 9 | 10,968.05 miles (17,651.32 km) WSW | Katanning Airport (KNI) | Katanning, Western Australia, Australia | |
| 10 | 10,932.03 miles (17,593.36 km) WSW | Jurien Bay Airport (JUR) | Jurien Bay, Western Australia, Australia | |
| 11 | 10,871.25 miles (17,495.54 km) SW | Geraldton Airport (GET) | Geraldton, Western Australia, Australia | |
| 12 | 10,837.13 miles (17,440.63 km) WSW | Morawa Airport (MWB) | Morawa, Western Australia, Australia | |
| 13 | 10,831.77 miles (17,432.00 km) SW | Kalbarri Airport (KAX) | Kalbarri, Western Australia, Australia | |
| 14 | 10,821.65 miles (17,415.71 km) SW | Mullewa Airport (MXU) | Mullewa, Western Australia, Australia | |
| 15 | 10,770.44 miles (17,333.31 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 | |