UA 3919 then DL 1777 at Houston
Raleigh-Durham → Houston → New York LaGuardia
Timetable, Houston time
23:15UA 3919 from Raleigh-Durham at the gate
14:00DL 1777 to New York LaGuardia leaves the gate
14 h 45 apart on the timetable, overnight
DL 1777 leaves 14 h 45 after UA 3919 arrives on the timetable: more than half a day, so not a connection we count.