Flight level
An altitude expressed in hundreds of feet referenced to the standard pressure setting (1013.2 hPa / 29.92 inHg) — e.g. FL350 is 35,000 ft on standard pressure — used at and above the transition altitude.
Related terms
An altitude expressed in hundreds of feet referenced to the standard pressure setting (1013.2 hPa / 29.92 inHg) — e.g. FL350 is 35,000 ft on standard pressure — used at and above the transition altitude.