AA 5490 then UA 2433 at Dulles
Charlotte → Washington → Newark
Timetable, Washington time
08:44AA 5490 from Charlotte at the gate
15:20UA 2433 to Newark leaves the gate
6 h 36 apart on the timetable
The last days
AA 5490 and UA 2433 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.