Nonstop flight route between Belfast, Northern Ireland, United Kingdom and Alton, Illinois, United States:

About this route:

A direct, nonstop flight between Belfast International Airport (BFS), Belfast, Northern Ireland, United Kingdom and St. Louis Regional Airport (ALN), Alton, Illinois, United States would travel a Great Circle distance of 3,863 miles (or 6,217 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 Belfast International Airport 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 Belfast International Airport 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 Belfast International Airport (BFS):

• A new terminal and apron were built with the necessary passenger facilities and the complex was opened by Queen Elizabeth, The Queen Mother on 28 October 1963.
• Because of Belfast International Airport's relatively low elevation of 268 feet, planes can take off or land at Belfast International 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 Belfast International Airport (BFS) is George Best Belfast City Airport (BHD), which is located only 14 miles (23 kilometers) E of BFS.
• Flyglobespan previously operated summer seasonal services to Orlando Sanford International Airport and John C.
• The site for the airport was established in 1917 when it was selected to be a Royal Flying Corps training establishment during the First World War.
• The airport was privatised in 1994.
• The furthest airport from Belfast International Airport (BFS) is Ryan's Creek Aerodrome (SZS), which is located 11,847 miles (19,065 kilometers) away in Stewart Island, New Zealand.
• Work has been completed within the airport to move the 'Central Search' area from its previous location, this is part of a bigger plan to increase the area for the main departure Lounge.
• Belfast International Airport handled 4,023,336 passengers last year.
• Belfast International Airport (BFS) has 2 runways.
• In 2005 Continental Airlines launched the first ever direct scheduled service to Newark, and direct scheduled services were later introduced to Vancouver with Zoom Airlines but have now ceased following the carrier's demise in August 2008.
• In addition to being known as "Belfast International Airport", another name for BFS is "Belfast/Aldergrove Airport".

Facts about St. Louis Regional Airport (ALN):

• The 2,250 acres airfield sits at 544 ft MSL.
• 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.
• St. Louis Regional Airport (ALN) has 2 runways.
• 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.
• 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.