ETAEstimated Time of Arrival

ETA — Estimated Time of Arrival

Operations · flight-times · ICAO Doc 4444 (PANS-ATM)

ETAAcronym
EIBTAcronym
Estimated Arrival TimeAlso known as
ReviewedLast verified: 2026-06-24

Definition

ETA (Estimated Time of Arrival) is the current best estimate of when an aircraft will touch down or arrive on stand at the destination airport. It updates continuously based on actual departure time, airspeed, wind and routing, and is distinct from the scheduled arrival time (STA).

ETA — Estimated Time of Arrival

ETA is the arrival equivalent of ETD. It is a continuously updated estimate used by airport operations, ground handlers, connecting passenger management teams and passengers awaiting arrivals.

Arrival Time Sequence

Key arrival time codes:

STA — Scheduled Time of Arrival (from published schedule)
ETA — Estimated Time of Arrival (updated en route)
ATA — Actual Time of Arrival (recorded when aircraft lands or arrives on stand)
ELDT — Estimated Landing Time
ALDT — Actual Landing Time
EIBT — Estimated In-Block Time (when aircraft expected to arrive at stand)
AIBT — Actual In-Block Time

Operational Impact of ETA

ETA affects: baggage claim belt assignment and activation timing, ground handling resource scheduling (steps, buses, cleaning), connecting passenger management — is there time to make the connection?, arrivals FIDS display and gate change management.

ETA Data Sources

ETA is initially calculated from the filed flight plan. Once airborne, it is updated from ATC radar data and ACARS position reports. Modern flight tracking services (Flightradar24, Cirium, OAG) provide ETA estimates to airports, airlines and third-party systems.

Related Terms

Standards & References

✦ICAO Doc 4444 (PANS-ATM)
✦EUROCONTROL A-CDM Implementation Manual

Sources

Last verified: 2026-06-24 · Status: reviewed