AA 3818 then AA 3555 at DFW
El Paso → Dallas-Fort Worth → Springfield
Timetable, Dallas-Fort Worth time
15:45AA 3818 from El Paso at the gate
12:45AA 3555 to Springfield leaves the gate
21 h apart on the timetable, overnight
AA 3555 leaves 21 h after AA 3818 arrives on the timetable: more than half a day, so not a connection we count.