UA 5203 then DL 2709 at Houston
Meridian → Houston → Atlanta
Timetable, Houston time
12:40UA 5203 from Meridian at the gate
08:05DL 2709 to Atlanta leaves the gate
19 h 25 apart on the timetable, overnight
DL 2709 leaves 19 h 25 after UA 5203 arrives on the timetable: more than half a day, so not a connection we count.