UA 2253 then DL 2709 at Houston
New Orleans → Houston → Atlanta
Timetable, Houston time
13:30UA 2253 from New Orleans at the gate
08:05DL 2709 to Atlanta leaves the gate
18 h 35 apart on the timetable, overnight
DL 2709 leaves 18 h 35 after UA 2253 arrives on the timetable: more than half a day, so not a connection we count.