UA 2234 then DL 2709 at Houston
Newark → Houston → Atlanta
Timetable, Houston time
13:28UA 2234 from Newark at the gate
08:05DL 2709 to Atlanta leaves the gate
18 h 37 apart on the timetable, overnight
DL 2709 leaves 18 h 37 after UA 2234 arrives on the timetable: more than half a day, so not a connection we count.