AA 2534 then UA 3911 at O'Hare
Charlotte → Chicago → Newark
Timetable, Chicago time
11:05AA 2534 from Charlotte at the gate
12:00UA 3911 to Newark leaves the gate
55 min apart on the timetable
The last days
AA 2534 and UA 3911 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.