Pilot/Controller Glossary
FLIGHT LEVEL [ICAO]
This reproduces published FAA reference text for study. It does not replace the current official FAA publication or regulation.
A surface of constant atmospheric pressure which is related to a specific pressure datum, 1013.2 hPa (1013.2 mb), and is separated from other such surfaces by specific pressure intervals.
Retrieved from ecfr.gov on July 18, 2026.