UA 2863 then DL 2709 at Houston
Sacramento → Houston → Atlanta
Timetable, Houston time
11:07UA 2863 from Sacramento at the gate
08:05DL 2709 to Atlanta leaves the gate
20 h 58 apart on the timetable, overnight
DL 2709 leaves 20 h 58 after UA 2863 arrives on the timetable: more than half a day, so not a connection we count.