DL 550 then DL 1509 at Atlanta
New York LaGuardia → Atlanta → Houston Hobby
Timetable, Atlanta time
08:26DL 550 from New York LaGuardia at the gate
08:16DL 1509 to Houston Hobby leaves the gate
23 h 50 apart on the timetable, overnight
DL 1509 leaves 23 h 50 after DL 550 arrives on the timetable: more than half a day, so not a connection we count.