DL 988 then DL 836 at Atlanta
New York LaGuardia → Atlanta → Phoenix
Timetable, Atlanta time
16:28DL 988 from New York LaGuardia at the gate
16:25DL 836 to Phoenix leaves the gate
23 h 57 apart on the timetable, overnight
DL 836 leaves 23 h 57 after DL 988 arrives on the timetable: more than half a day, so not a connection we count.