UA 2830 then DL 2709 at Houston
Las Vegas → Houston → Atlanta
Timetable, Houston time
13:05UA 2830 from Las Vegas at the gate
08:05DL 2709 to Atlanta leaves the gate
19 h apart on the timetable, overnight
DL 2709 leaves 19 h after UA 2830 arrives on the timetable: more than half a day, so not a connection we count.