KJ 248 then DL 955 at Atlanta
Chicago O'Hare → Atlanta → Las Vegas
Timetable, Atlanta time
19:54KJ 248 from Chicago O'Hare at the gate
19:21DL 955 to Las Vegas leaves the gate
23 h 27 apart on the timetable, overnight
DL 955 leaves 23 h 27 after KJ 248 arrives on the timetable: more than half a day, so not a connection we count.