AA 1915 then AA 3779 at DFW
Richmond → Dallas-Fort Worth → Lexington
Timetable, Dallas-Fort Worth time
19:40AA 1915 from Richmond at the gate
19:21AA 3779 to Lexington leaves the gate
23 h 41 apart on the timetable, overnight
AA 3779 leaves 23 h 41 after AA 1915 arrives on the timetable: more than half a day, so not a connection we count.