Nonstop flight route between Alton, Illinois, United States and Boise, Idaho, United States:
Departure Airport:
(38°53'25"N by 90°2'45"W)
Arrival Airport:
(43°33'51"N by 116°13'22"W)
Distance from ALN to BOI:
1,391.82 miles (2,239.90 km)
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Jump to:
- About this route
- ALN Airport Information
- BOI Airport Information
- Facts about ALN
- Facts about BOI
- 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 BOI
- List of Nearest Airports to BOI
- Map of Furthest Airports from BOI
- List of Furthest Airports from BOI
About this route:
A direct, nonstop flight between St. Louis Regional Airport (ALN), Alton, Illinois, United States and Boise Airport (BOI), Boise, Idaho, United States would travel a Great Circle distance of 1,392 miles (or 2,240 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 Boise 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: | BOI / KBOI |
| Airport Names: |
|
| Location: | Boise, Idaho, United States |
| GPS Coordinates: | 43°33'51"N by 116°13'22"W |
| Area Served: | Boise, Idaho |
| Airport Type: | Public |
| Elevation: | 2871 feet (875 meters) |
| # of Runways: | 3 |
| View all routes: | Routes from BOI |
| More Information: | BOI 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.
- 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.
- St. Louis Regional Airport (ALN) has 2 runways.
- 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.
Facts about Boise Airport (BOI):
- On January 4, 2008, city officials broke ground for Boise Air Terminal's latest improvement, a new air traffic control tower.
- The Boise Airport was a hub for Horizon Air from the late 1980s to the early 2000s with over 50 flights to 15 destinations at its peak, but was scaled down post 9/11.
- The furthest airport from Boise Airport (BOI) is Tôlanaro Airport (FTU), which is located 10,843 miles (17,451 kilometers) away in Tôlanaro, Madagascar.
- In 1926 the first municipal airport in Boise named Booth Field was built on a gravel bed where the Boise State University campus now stands.
- The closest airport to Boise Airport (BOI) is Mountain Home Air Force Base (MUO), which is located 40 miles (64 kilometers) SSE of BOI.
- In addition to being known as "Boise Airport", other names for BOI include "Boise Air Terminal" and "Gowen Field".
- Boise Airport (BOI) has 3 runways.
- Between 2001 and 2005 Boise Airport was remodeled.
| 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 | 40.06 miles (64.48 km) SSE | Mountain Home Air Force Base (MUO) | Mountain Home, Idaho, United States | |
| 2 | 50.42 miles (81.14 km) NW | Ontario Municipal Airport (ONO) | Ontario, Oregon, United States | |
| 3 | 91.69 miles (147.56 km) N | McCall Municipal Airport (MYL) | McCall, Idaho, United States | |
| 4 | 96.62 miles (155.50 km) E | Friedman Memorial Airport (SUN) | Hailey, Idaho, United States | |
| 5 | 108.12 miles (174.00 km) SW | Rome State Airport (REO) | Rome, Oregon, United States | |
| 6 | 115.22 miles (185.43 km) SE | Magic Valley Regional Airport (TWF) | Twin Falls, Idaho, United States | |
| 7 | 117.93 miles (189.79 km) NW | Baker City Municipal Airport (BKE) | Baker City, Oregon, United States | |
| 8 | 119.61 miles (192.49 km) NE | Challis Airport (CHL) | Challis, Idaho, United States | |
| 9 | 135.44 miles (217.97 km) SE | Jackpot Airport (KPT) | Jackpot, Nevada, United States | |
| 10 | 136.79 miles (220.15 km) W | Burns Municipal Airport (BNO) | Burns, Oregon, United States | |
| 11 | 142.47 miles (229.28 km) ESE | Burley Municipal Airport (BYI) | Burley, Idaho, United States | |
| 12 | 148.22 miles (238.54 km) NW | La Grande/Union County Airport (LGD) | La Grande, Oregon, United States | |
| 13 | 148.24 miles (238.57 km) WNW | Grant County Regional Airport (GCRA) (JDA) | John Day, Oregon, United States | |
| 14 | 158.08 miles (254.41 km) NE | Lemhi County Airport (SMN) | Salmon, Idaho, United States | |
| 15 | 181.66 miles (292.35 km) SSE | Wells Municipal Airport (LWL) | Wells, Nevada, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,843.42 miles (17,450.75 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 2 | 10,826.76 miles (17,423.94 km) SSE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 3 | 10,800.13 miles (17,381.08 km) SSE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 4 | 10,799.52 miles (17,380.10 km) SSE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 10,791.72 miles (17,367.55 km) S | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 6 | 10,746.80 miles (17,295.26 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 7 | 10,655.65 miles (17,148.57 km) SE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 8 | 10,633.65 miles (17,113.16 km) SE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 10,546.74 miles (16,973.30 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 10 | 10,542.45 miles (16,966.39 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 11 | 10,529.80 miles (16,946.04 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 10,488.61 miles (16,879.74 km) SSE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 13 | 10,481.22 miles (16,867.85 km) SE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 14 | 10,468.36 miles (16,847.15 km) SE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |
| 15 | 10,447.05 miles (16,812.86 km) SE | Belo sur Tsiribihina Airport (BMD) | Belo sur Tsiribihina, Madagascar | |