AA 4516 then UA 2151 at O'Hare
Washington National → Chicago → Newark
Timetable, Chicago time
23:36AA 4516 from Washington National at the gate
06:00UA 2151 to Newark leaves the gate
6 h 24 apart on the timetable, overnight
The last days
AA 4516 and UA 2151 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.