UA 4556 then AA 9786 at O'Hare
Cedar Rapids → Chicago → Philadelphia
Timetable, Chicago time
16:48UA 4556 from Cedar Rapids at the gate
17:30AA 9786 to Philadelphia leaves the gate
42 min apart on the timetable
The last days
UA 4556 and AA 9786 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.