Why Your Airline App Always Tells You About Delays Last

The Gap Between Reality and Your Notification

You're sitting at the gate. The departure board still says "On Time." Your airline's app says "On Time." But the aircraft that's supposed to fly you home is sitting on a tarmac in Frankfurt, and has been for the past 40 minutes. You won't find out for another hour.

How Third-Party Trackers Know First

Services like AlphaFlights use ADS-B data — every commercial aircraft broadcasts its position, altitude, speed, and heading via a transponder. This data is received by a global network of ground stations and aggregated in near real time. If the inbound aircraft is still on the ground, ADS-B shows it. No airline announcement needed.

Search your flight on AlphaFlights before you leave for the airport. Check the inbound aircraft's position. If it's running late, you'll know before the gate agent does.