Definition 1 of 2
Plain English Meaning
The clock time you expect to reach where you are going. It is a forecast, not a promise, and it gets revised as the flight progresses.
Full Definition
The time a pilot expects an aircraft to arrive over a specified fix or to land at the destination airport, based on current groundspeed, distance remaining, and known winds. ETA is expressed in coordinated universal time (UTC) for IFR flight plans and ATC use, and is updated in flight as conditions change.
Context Anchor
Seen in flight planning, navigation logs, flight plans, and with .