UA 2860 then DL 5877 at Boston
Newark → Boston → Charlotte
Timetable, Boston time
09:17UA 2860 from Newark at the gate
15:35DL 5877 to Charlotte leaves the gate
6 h 18 apart on the timetable
The last days
UA 2860 and DL 5877 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.