UA 2453 then DL 2709 at Houston
Jacksonville → Houston → Atlanta
Timetable, Houston time
08:36UA 2453 from Jacksonville at the gate
08:05DL 2709 to Atlanta leaves the gate
23 h 29 apart on the timetable, overnight
DL 2709 leaves 23 h 29 after UA 2453 arrives on the timetable: more than half a day, so not a connection we count.