AA 3387 then AA 2753 at DFW
Lubbock → Dallas-Fort Worth → Valparaiso
Timetable, Dallas-Fort Worth time
16:57AA 3387 from Lubbock at the gate
16:51AA 2753 to Valparaiso leaves the gate
23 h 54 apart on the timetable, overnight
AA 2753 leaves 23 h 54 after AA 3387 arrives on the timetable: more than half a day, so not a connection we count.