Two flight trackers can show different times without either one being obviously broken. Aviation data arrives from different sources, at different moments, and with different definitions.
Understanding a few distinctions makes flight status much easier to read.
Scheduled time
The scheduled time is the published plan. It is useful for identifying the flight and planning the day, but it is not a promise that the aircraft will move at that exact minute.
Schedules can also be revised before the day of operation. A saved trip should therefore keep checking future flights rather than treating the first published time as permanent.
Estimated or revised time
An estimated time reflects the best current prediction. Depending on the provider, FlightDan may receive a direct delay value or derive a delay from the difference between revised and scheduled timestamps.
Estimates can move in both directions as the airline, airport, or data provider receives better information.
Actual time
“Departure” can refer to leaving the gate or taking off. “Arrival” can refer to landing or reaching the destination gate. Different products may emphasize different milestones, so two apparently conflicting times may describe separate events.
Status labels
Providers also use different status vocabularies. One may report active, another en route, and another departed. FlightDan normalizes provider data into a consistent experience, but it preserves the practical meaning rather than pretending every source is identical.
Coverage and freshness
Live airport feeds and aircraft tracking are not uniform worldwide. Some airports provide rich movement data; others provide mostly scheduled information. A tracker can only be as fresh as the sources available for that flight.
For that reason, FlightDan treats its status as a useful monitoring signal—not the final operational authority. When a decision is time-critical, confirm it with the operating airline or airport.