UA 751 then OO 9912 at O'Hare
Charlotte → Chicago → Richmond
Timetable, Chicago time
07:25UA 751 from Charlotte at the gate
07:30OO 9912 to Richmond leaves the gate
5 min apart on the timetable
Today
From the airport’s board at 11:05 Chicago time
07:12UA 751 reached the gate13 min early
07:59OO 9912 left the gate29 min late
47 min between the gates
The last days
UA 751 and OO 9912 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.