DL 1323 then AA 1859 at Miami
Atlanta → Miami → Houston
Timetable, Miami time
16:00DL 1323 from Atlanta at the gate
15:35AA 1859 to Houston leaves the gate
23 h 35 apart on the timetable, overnight
AA 1859 leaves 23 h 35 after DL 1323 arrives on the timetable: more than half a day, so not a connection we count.