AA 3844 then AA 5418 at DFW
Moline → Dallas-Fort Worth → Harlingen
Timetable, Dallas-Fort Worth time
09:38AA 3844 from Moline at the gate
21:48AA 5418 to Harlingen leaves the gate
12 h 10 apart on the timetable
AA 5418 leaves 12 h 10 after AA 3844 arrives on the timetable: more than half a day, so not a connection we count.