UA 6247 then DL 2709 at Houston
Pensacola → Houston → Atlanta
Timetable, Houston time
10:58UA 6247 from Pensacola at the gate
08:05DL 2709 to Atlanta leaves the gate
21 h 07 apart on the timetable, overnight
DL 2709 leaves 21 h 07 after UA 6247 arrives on the timetable: more than half a day, so not a connection we count.