UA 237 then DL 5764 at Newark
Nashville → New York → Boston
Timetable, New York time
08:55UA 237 from Nashville at the gate
08:40DL 5764 to Boston leaves the gate
23 h 45 apart on the timetable, overnight
DL 5764 leaves 23 h 45 after UA 237 arrives on the timetable: more than half a day, so not a connection we count.