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In aviation and aviation meteorology, a flight level (FL) is an aircraft's altitude at standard air pressure, expressed in hundreds of feet. The air pressure is computed assuming an International Standard Atmosphere pressure of 1013.25 hPa (29.92 inHg) at sea level, and therefore is not necessarily the same as the aircraft's actual altitude, either above sea level or above ground level.[1]
Scale comparison of some flight level systems
^Wragg, David W. (1973). A Dictionary of Aviation (first ed.). Osprey. p. 133. ISBN 9780850451634.
In aviation and aviation meteorology, a flightlevel (FL) is an aircraft's altitude at standard air pressure, expressed in hundreds of feet. The air pressure...
Malaysia Airlines Flight 370 (MH370/MAS370) was an international passenger flight operated by Malaysia Airlines that disappeared from radar on 8 March...
as the standard sea level at which atmospheric pressure is measured to calibrate altitude and, consequently, aircraft flightlevels. A common and relatively...
kilometers) wide, and the airway flightlevels keep aircraft separated by at least 1000 vertical feet from aircraft on the flightlevel above and below. Airways...
Tenerife. The collision occurred when KLM Flight 4805 initiated its takeoff run during dense fog while Pan Am Flight 1736 was still on the runway. The impact...
National Oceanography Centre. Retrieved 31 January 2024. "Altitude, FlightLevel and Height". SKYbrary Aviation Safety. Retrieved 31 January 2024. "TOWAIR...
Flight 007 (KE007/KAL007) was a scheduled Korean Air Lines flight from New York City to Seoul via Anchorage, Alaska. On September 1, 1983, the flight...
Air France Flight 447 (AF447/AFR447) was a scheduled international passenger flight from Rio de Janeiro, Brazil, to Paris, France. On 1 June 2009, inconsistent...
Santiago. LATAM Airlines Flight 800 departed from Sydney Airport at 11:44 AEDT (00:44 UTC), climbing to cruise at flightlevel 410 (approximately 41,000 ft...
then cleared for descent to flightlevel 75 (approximately 7,500 feet (2,300 m)) and eventually to 4,000 feet (1,200 m). Flight crews were asked to report...
flight crew quickly determined that the aircraft was capable of gliding for 23 minutes and covering 91 nautical miles (169 km) from its flightlevel of...
Malaysia Airlines Flight 17 (MH17/MAS17) was a scheduled passenger flight from Amsterdam to Kuala Lumpur that was shot down by Russian-controlled forces...
South African Airways Flight 295 (SA295/SAA295) was a scheduled international passenger flight from Chiang Kai-shek International Airport, Taipei, Taiwan...
Alaska Airlines Flight 261 was an Alaska Airlines flight of a McDonnell Douglas MD-80 series aircraft that crashed into the Pacific Ocean on January 31...
maneuvers such as levelflight, climbs and descents, and coordinated turns can be modeled as steady flight maneuvers. Typical aircraft flight consists of a...
Qantas Flight 72 (QF72) was a scheduled flight from Singapore Changi Airport to Perth Airport by an Airbus A330. On 7 October 2008, the flight made an...
sea level (MSL) or local ground level (above ground level, or AGL) as the reference datum. Pressure altitude divided by 100 feet (30 m) is the flight level...
separation required between aircraft flying between flightlevel 290 (29,000 ft) and flightlevel 410 (41,000 ft). Expressed in the International System...
gives pressure altitude and is used to maintain one of the standard flightlevels. The setting of a sensitive pressure altimeter is shown in the Kollsman...
Pan Am Flight 812 (PA812), operated by a Pan American World Airways Boeing 707-321B registered N446PA and named Clipper Climax, was a scheduled international...
conditions. Class A airspace extends from 18,000 feet above mean sea level to flightlevel 600 (60,000 feet pressure altitude) above the contiguous 48 United...
Airport (HNL), Honolulu, Hawaii. During level cruise flight shortly before beginning a descent from flightlevel 360 (roughly 36,000 feet or 11,000 meters)...
over half an hour after takeoff, cruising at flightlevel 390 (about 39,000 ft (12,000 m) above sea level), the electronic centralized aircraft monitoring...
Air India Flight 101 was a scheduled Air India passenger flight from Mumbai to London, via Delhi, Beirut, and Geneva. On the morning of 24 January 1966...
routine flight to take off at a higher weight, consume fuel en route, and arrive at a lower weight. It is an abnormal, non-routine flight where landing...
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