AA 3818 then AA 1550 at DFW
El Paso → Dallas-Fort Worth → Washington National
Timetable, Dallas-Fort Worth time
15:45AA 3818 from El Paso at the gate
10:25AA 1550 to Washington National leaves the gate
18 h 40 apart on the timetable, overnight
AA 1550 leaves 18 h 40 after AA 3818 arrives on the timetable: more than half a day, so not a connection we count.