UA 2860 then UA 503 at Boston
Newark → Boston → Chicago O'Hare
Timetable, Boston time
09:17UA 2860 from Newark at the gate
10:25UA 503 to Chicago O'Hare leaves the gate
1 h 08 apart on the timetable
The last days
UA 2860 and UA 503 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.