AA 5257 then AA 5347 at Philadelphia
Lexington → Philadelphia → Richmond
Timetable, Philadelphia time
18:50AA 5257 from Lexington at the gate
10:02AA 5347 to Richmond leaves the gate
15 h 12 apart on the timetable, overnight
AA 5347 leaves 15 h 12 after AA 5257 arrives on the timetable: more than half a day, so not a connection we count.