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):
- 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.
- Civic Memorial Airport opened in 1946 and received its current name in 1984.
- 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.
- St. Louis Regional Airport (ALN) has 2 runways.
- 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.
Facts about Boise Airport (BOI):
- During World War II the Army Air Corps, later Army Air Forces, leased the field for use a training base for B-17 Flying Fortress and B-24 Liberator bomber crews.
- Boise Airport (BOI) has 3 runways.
- The closest airport to Boise Airport (BOI) is Mountain Home Air Force Base (MUO), which is located 40 miles (64 kilometers) SSE of BOI.
- 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.
- The airport can handle minor maintenance and repairs through fixed base operators Jackson Jet Center, Turbo Air and Western Aircraft.
- In addition to being known as "Boise Airport", other names for BOI include "Boise Air Terminal" and "Gowen Field".
- Boise Airport is a joint civil-military airport three miles south of Boise in Ada County, Idaho.
| 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 | |