Nonstop flight route between Cairns, Queensland, Australia and Sidney, Montana, United States:

About this route:

A direct, nonstop flight between Cairns Airport (CNS), Cairns, Queensland, Australia and Sidney-Richland Municipal Airport (SDY), Sidney, Montana, United States would travel a Great Circle distance of 8,003 miles (or 12,879 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 Cairns Airport and Sidney-Richland Municipal 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 Cairns Airport and Sidney-Richland Municipal 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 Cairns Airport (CNS):

• During the 1970s, Australia's two domestic airlines Trans Australia Airlines and Ansett provided regular scheduled services to most Australian capital cities and also Papua New Guinea, while in 1975 Air Niugini became the first international airline to commence flights out of Cairns, to Port Moresby in Papua New Guinea.
• Cairns Airport handled 3,848,728 passengers last year.
• Because of Cairns Airport's relatively low elevation of 10 feet, planes can take off or land at Cairns 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.
• Cairns Airport (CNS) currently has only 1 runway.
• The furthest airport from Cairns Airport (CNS) is Agostinho Neto Airport (NTO), which is located 11,832 miles (19,041 kilometers) away in Ponta do Sol, Santo Antão, Cape Verde.
• Ranks are located near both the International and Domestic Terminals.
• The closest airport to Cairns Airport (CNS) is Mareeba Airfield (MRG), which is located 26 miles (41 kilometers) WSW of CNS.
• During World War II the Australian Government bought the airport for use by the Royal Australian Air Force.

Facts about Sidney-Richland Municipal Airport (SDY):

• Sidney-Richland Municipal Airport (SDY) has 2 runways.
• The furthest airport from Sidney-Richland Municipal Airport (SDY) is Sir Gaëtan Duval Airport (RRG), which is located 10,383 miles (16,711 kilometers) away in Rodrigues Island, Mauritius.
• As per the Federal Aviation Administration, this airport had 2,031 passenger boardings in calendar year 2008, 2,766 in 2009, and 3,659 in 2010.
• Sidney-Richland Municipal Airport is a public use airport located one nautical mile west of the central business district of Sidney, a city in Richland County, Montana, United States.
• The closest airport to Sidney-Richland Municipal Airport (SDY) is Sloulin Field International Airport (ISN), which is located 41 miles (67 kilometers) NE of SDY.