AA 3818 then AA 3637 at DFW
El Paso → Dallas-Fort Worth → Lubbock
Timetable, Dallas-Fort Worth time
15:45AA 3818 from El Paso at the gate
10:50AA 3637 to Lubbock leaves the gate
19 h 05 apart on the timetable, overnight
AA 3637 leaves 19 h 05 after AA 3818 arrives on the timetable: more than half a day, so not a connection we count.