UA 1981 then UA 510 at Newark
Los Angeles → New York → Rome
Timetable, New York time
20:33UA 1981 from Los Angeles at the gate
20:20UA 510 to Rome leaves the gate
23 h 47 apart on the timetable, overnight
UA 510 leaves 23 h 47 after UA 1981 arrives on the timetable: more than half a day, so not a connection we count.