UA 1733 then AA 3144 at O'Hare
Jacksonville → Chicago → Houston
Timetable, Chicago time
09:00UA 1733 from Jacksonville at the gate
21:05AA 3144 to Houston leaves the gate
12 h 05 apart on the timetable
AA 3144 leaves 12 h 05 after UA 1733 arrives on the timetable: more than half a day, so not a connection we count.