I don’t know exactly how Flightradar24 works, but getting the track is great. I use Flight Aware and a U2 came over the other day making its distinctive roaring rumble, but it wasn’t on my Flight Aware app even though I could just make the plane out in the sky. Some military flights show up, some don’t. My limited understanding is most flights broadcast their location and info via the ADS-B system, but military sometimes turn that off.
So, if the track is on Flightradar24 ... Read even more