The length of an airport runway varies significantly depending on the types of aircraft it is intended to serve and the airport's elevation. For a small, private airfield catering to light, single-engine planes, a runway might be as short as 2,000 to 3,000 feet. However, for major international airports that handle heavy commercial jets like the Boeing 777 or Airbus A380, runways typically range from 8,000 to 13,000 feet (about 1.5 to 2.5 miles). At high-altitude airports like Denver International or Qamdo Bamda in Tibet, runways must be even longer—up to 16,000 or 18,000 feet—because the thinner air provides less lift and reduces engine performance, requiring planes to reach higher ground speeds before taking off. Width also varies, with standard commercial runways being about 150 to 200 feet wide to provide a safe margin for landing gear.