Plain English Meaning

Your best guess of what time you will get there, worked out from how fast you are going and how far you still have to fly.

Full Definition

The time the pilot expects the aircraft to arrive over a specified fix or destination, based on current groundspeed, route, and remaining distance. ETA is normally expressed in Coordinated Universal Time (UTC, also called Zulu time) and is updated in flight as conditions change.

Context Anchor

Pilots use ETA in flight planning, navigation logs, position reports, and radio calls with air traffic control.