Nonstop flight route between Sofia, Bulgaria and Alton, Illinois, United States:

About this route:

A direct, nonstop flight between Sofia Airport Vrazhdebna (SOF), Sofia, Bulgaria and St. Louis Regional Airport (ALN), Alton, Illinois, United States would travel a Great Circle distance of 5,429 miles (or 8,737 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 large distance between Sofia Airport Vrazhdebna and St. Louis Regional Airport, the route shown on this map most likely appears curved because of this reason.

Try it at home! Get a globe and tightly lay a string between Sofia Airport Vrazhdebna and St. Louis Regional Airport. You'll see that it will travel the same route of the red line on this map!

Departure Airport Information:

Arrival Airport Information:

Facts about Sofia Airport Vrazhdebna (SOF):

• Contract for detailed design and construction of a new control tower of the airport and forming an ATM Glavbolgarstroy.
• The furthest airport from Sofia Airport Vrazhdebna (SOF) is Chatham Islands (CHT), which is located 11,437 miles (18,405 kilometers) away in Waitangi, Chatham Islands, New Zealand.
• Sofia Airport Vrazhdebna (SOF) currently has only 1 runway.
• Lufthansa Technik Sofia was founded in late 2007 as a joint venture between Lufthansa Technik and the Bulgarian Aviation Group.
• In addition to being known as "Sofia Airport Vrazhdebna", other names for SOF include "Vrazhdebna Airport" and "Летище София".
• Design and construction of a new control tower was discussed in 2006 but this project appeared to be in abeyance by 2008.
• The construction of the new Sofia tower is related to the reconstruction and development of Sofia Airport and is the natural extension of the development of the airport complex.
• Sofia Airport Vrazhdebna handled 350,432 passengers last year.
• The closest airport to Sofia Airport Vrazhdebna (SOF) is Plovdiv Airport (PDV), which is located 86 miles (138 kilometers) ESE of SOF.
• A significant and recurring operational criticism of Sofia Airport has concerned its historical lack of all-weather operations capability.

Facts about St. Louis Regional Airport (ALN):

• 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.
• 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.
• West Star Aviation is the largest fixed base operations company at the airport.
• 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 2,250 acres airfield sits at 544 ft MSL.