AA 5549 then AA 622 at DFW
Lexington → Dallas-Fort Worth → Milwaukee
Timetable, Dallas-Fort Worth time
13:48AA 5549 from Lexington at the gate
09:30AA 622 to Milwaukee leaves the gate
19 h 42 apart on the timetable, overnight
AA 622 leaves 19 h 42 after AA 5549 arrives on the timetable: more than half a day, so not a connection we count.