AA 6443 then AA 1974 at DFW
Lincoln → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
08:40AA 6443 from Lincoln at the gate
06:12AA 1974 to Chicago O'Hare leaves the gate
21 h 32 apart on the timetable, overnight
AA 1974 leaves 21 h 32 after AA 6443 arrives on the timetable: more than half a day, so not a connection we count.