UA 751 then UA 8160 at O'Hare
Charlotte → Chicago → Cleveland
Timetable, Chicago time
07:25UA 751 from Charlotte at the gate
15:55UA 8160 to Cleveland leaves the gate
8 h 30 apart on the timetable
Today
From the airport’s board at 21:25 Chicago time
07:16UA 751 reached the gate9 min early
17:18UA 8160 left the gate1 h 23 late
10 h 02 between the gates
The last days
UA 751 and UA 8160 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.