Qamdo Bamda Airport – 2nd Highest Airport

Enter a captionQamdo Airport was the highest airport in the world by 4,334 m (14,219 ft) above from sea level. (IATA: BPX, ICAO: ZUBD), also known as Changdu Bangda Airport, (Tibet, China)

Location
City:		Bangda, Qamdo (Chamdo), Tibet, China
Near (Alt.):		Bamda, Bangdag
Name:		Qamdo Bamda Airport
Old (Alt.):		Pangda Airport
ICAO:		ZUBD
IATA:		BPX
Details
Type:		Airport (Aerodrome, Airfield)
Latitude:		30°33’13″N (30.553611)
Longitude:		97°06’30″E (97.108333)
Elevation:		14219 ft (4334 m)
Variation:		0.66°W (WMM2015 magnetic declination) 0.01° annual change
Runways:		1
Longest:		18045 × 148 ft (5500 × 45 m), paved
Time
Time Zone:		UTC+8
Local Time:		05 Jan 2019 23:48 CST

information by http://www.gcmap.com/airport/BPX

map image via skybrary.aero

Then Daocheng Yading Airport came had the record with 4,411 m (14,472 ft) high on 16 September 2013.

Really long runways. Why?
Location height causes reduction in engine and lift performance. So aircrafts need more than normal lift-off speeds and so longer runs.