AA 3978 then AA 2145 at DFW
Alexandria → Dallas-Fort Worth → Newark
Timetable, Dallas-Fort Worth time
07:40AA 3978 from Alexandria at the gate
18:16AA 2145 to Newark leaves the gate
10 h 36 apart on the timetable
The last days
AA 3978 and AA 2145 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.