UA 3280 then DL 1777 at Houston
Greensboro → Houston → New York LaGuardia
Timetable, Houston time
20:30UA 3280 from Greensboro at the gate
14:00DL 1777 to New York LaGuardia leaves the gate
17 h 30 apart on the timetable, overnight
DL 1777 leaves 17 h 30 after UA 3280 arrives on the timetable: more than half a day, so not a connection we count.