AA 9950 then UA 4535 at O'Hare
Charlotte → Chicago → Pittsburgh
Timetable, Chicago time
08:30AA 9950 from Charlotte at the gate
12:48UA 4535 to Pittsburgh leaves the gate
4 h 18 apart on the timetable
Today
From the airport’s board at 04:17 Chicago time
08:30AA 9950 due at the gate, no estimate yet
12:48UA 4535 due to leave, no estimate yet
4 h 18 between the gates, on these times
The last days
AA 9950 and UA 4535 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.