Hello!
Great question! The longest runway in the world, as far as I know is the one at Qamdo Bamda Airport (IATA: BPX, ICAO: ZUBD) in Tibet, China. This runway stretches a staggering 5,500 meters (18,045 feet) in length. The reason behind its extraordinary length is due to the airport's elevation, which is about 4,334 meters (14,219 feet) above sea level. At such high altitudes, air density is significantly lower, which in turn requires aircraft to achieve higher ground speeds for takeoff. Consequently, a longer runway is needed to provide the extra distance required for aircraft to achieve these higher speeds and generate sufficient lift.
Here are some other notable long runways from around the world:
- Ramenskoye Airport (IATA: ZIA, ICAO: UUBW) in Moscow, Russia, has a runway that measures 5,402 meters (17,723 feet). This airport is primarily used for testing and development of new aircraft, so its long runway enables various takeoff and landing configurations to be assessed safely.
- Shuttle Landing Facility (ICAO: KTTS), located at NASA's Kennedy Space Center in Florida, USA, boasts a runway that is 4,572 meters (15,000 feet) long. This lengthy runway was specifically designed to accommodate the space shuttle upon its return from space, as well as other spacecraft and experimental aircraft.
- Upington Airport (IATA: UTN, ICAO: FAUP) in South Africa has a runway that spans 4,900 meters (16,076 feet). Originally built as an alternative landing site for the space shuttle, it is now utilized for both civilian and cargo flights.
While these are just a few examples of lengthy runways, there are numerous other airports around the globe with similarly long runways. Generally, you'll find that long runways are constructed to accommodate larger aircraft, to allow for varying takeoff and landing configurations, or to compensate for environmental factors like high altitudes or strong prevailing winds.
I hope this information proves helpful in your quest to learn more about the world's longest runways. Happy flying!