Two American [Airlines] planes with same callsign end up on same frequency, heading straight for one another

Every flight has a callsign that's used with air traffic control, and for commercial aircraft, that's generally going to be the generic airline callsign plus the flight number. Callsigns are of course unique to a particular flight, because that's the way that air traffic control communicates with pilots. That brings us to what happened very late last night (Thursday, August 13, 2026), in Phoenix. AA2482 is a flight number used by American between Chicago (ORD) and Phoenix (PHX). The flight number is actually used in both directions of travel, which isn't that uncommon, with both flights being operated by Boeing...