Nonstop flight route between Chicago, Illinois, United States and Roskilde (near Copenhagen), Denmark:

About this route:

A direct, nonstop flight between Chicago O'Hare International Airport (ORD), Chicago, Illinois, United States and Roskilde Airport (RKE), Roskilde (near Copenhagen), Denmark would travel a Great Circle distance of 4,243 miles (or 6,828 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 Chicago O'Hare International Airport and Roskilde 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 Chicago O'Hare International Airport and Roskilde 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 Chicago O'Hare International Airport (ORD):

• United and American both established nationwide hubs at the airport in the 1980s, which continue to operate today.
• The closest airport to Chicago O'Hare International Airport (ORD) is Chicago Executive Airport (PWK), which is located only 9 miles (15 kilometers) N of ORD.
• In 1945, the facility was chosen by the city of Chicago as the site for a facility to meet future aviation demands.
• The furthest airport from Chicago O'Hare International Airport (ORD) is Margaret River Airport (MGV), which is located 11,071 miles (17,817 kilometers) away in Margaret River, Western Australia, Australia.
• During this era international flights used Terminal 1.
• United also runs a post-security shuttle service between Concourse C and Concourses E & F in Terminal 2.
• Chicago O'Hare International Airport (ORD) has 8 runways.
• The original Douglas Aircraft C-54 Skymaster transport manufacturing plant on the northeast side of the airport became a United States Air Force Air National Guard and Air Force Reserve facility after World War II.
• Until 2005, O'Hare was the world's busiest airport in number of takeoffs and landings.
• United Airlines is the largest airline at O'Hare, carrying over 45% of all passengers passing through the airport.
• Because of Chicago O'Hare International Airport's relatively low elevation of 668 feet, planes can take off or land at Chicago O'Hare 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.

Facts about Roskilde Airport (RKE):

• The closest airport to Roskilde Airport (RKE) is Copenhagen Airport, Kastrup (CPH), which is located 21 miles (33 kilometers) E of RKE.
• Roskilde Airport (RKE) has 2 runways.
• Because of Roskilde Airport's relatively low elevation of 146 feet, planes can take off or land at Roskilde 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.
• Roskilde Airport is planning an expansion of the runways and airport facilities to receive regular flights of low-cost international and charter operators, including aircraft types of Boeing 737 and Airbus A320-family sizes.
• A small Danish Air Force installation is located adjacent to the airport, called Flyvestation Skalstrup.
• Lately Roskilde Airport has been the departure airport of Danish troops deploying to or returning from overseas locations, primarily Afghanistan, due to its more private and secluded atmosphere, compared to the far busier Copenhagen Airport, Kastrup.
• In addition to being known as "Roskilde Airport", other names for RKE include "Københavns Lufthavn, Roskilde" and "Copenhagen Airport, Roskilde".
• The furthest airport from Roskilde Airport (RKE) is Chatham Islands (CHT), which is located 11,539 miles (18,570 kilometers) away in Waitangi, Chatham Islands, New Zealand.