ETA stands for – ‘Estimated Time of Arrival.

Especially when someone is travelling, and you need to track – the time when they reach or arrive,at the destination –  the transport companies provide – an estimated time of arrival, or  ETA.

For example .

My sister’s Delhi to Mumbai flight has got delayed due to air traffic at Delhi airport. The initial ETA was 10 am, but because of the delay, the new ETA is 11:30 am.