Nonstop flight route between Boise, Idaho, United States and Alton, Illinois, United States:

About this route:

A direct, nonstop flight between Boise Airport (BOI), Boise, Idaho, United States and St. Louis Regional Airport (ALN), Alton, Illinois, 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 Boise Airport and St. Louis Regional Airport, the route shown on this map most likely still appears to be a straight line.

Departure Airport Information:

Arrival Airport Information:

Facts about Boise Airport (BOI):

• The Boise Airport Passenger Terminal designed by CSHQA is a three-story, steel-framed 378,000-square-foot state-of-the-art aviation facility.
• 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.
• Gowen Field Air National Guard Base primarily refers to the military facilities on the south side of the runways, which includes Air National Guard, Army National Guard, and reserve units of the Army, Navy, and Marine Corps.
• Boise Airport (BOI) has 3 runways.
• 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 field was named Gowen Field in 1941 on July 23, after 1st Lt.
• In addition to being known as "Boise Airport", other names for BOI include "Boise Air Terminal" and "Gowen Field".
• The closest airport to Boise Airport (BOI) is Mountain Home Air Force Base (MUO), which is located 40 miles (64 kilometers) SSE of BOI.

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.
• 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.
• In the spring of 2004 the airport was at the center of a scandal.
• 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.
• Today a fair amount of air traffic and the Direct TV blimp comes for Cardinals playoffs, as Lambert's airport cannot take the blimp.