UA 1012 then DL 1509 at Atlanta
Newark → Atlanta → Houston Hobby
Timetable, Atlanta time
08:33UA 1012 from Newark at the gate
08:16DL 1509 to Houston Hobby leaves the gate
23 h 43 apart on the timetable, overnight
DL 1509 leaves 23 h 43 after UA 1012 arrives on the timetable: more than half a day, so not a connection we count.