AA 3997 then AA 5257 at DFW
Longview → Dallas-Fort Worth → Gainesville
Timetable, Dallas-Fort Worth time
07:21AA 3997 from Longview at the gate
19:34AA 5257 to Gainesville leaves the gate
12 h 13 apart on the timetable
AA 5257 leaves 12 h 13 after AA 3997 arrives on the timetable: more than half a day, so not a connection we count.