AA 3818 then AA 3603 at DFW
El Paso → Dallas-Fort Worth → Tampico
Timetable, Dallas-Fort Worth time
15:45AA 3818 from El Paso at the gate
11:55AA 3603 to Tampico leaves the gate
20 h 10 apart on the timetable, overnight
AA 3603 leaves 20 h 10 after AA 3818 arrives on the timetable: more than half a day, so not a connection we count.