AA 4424 then UA 3911 at O'Hare
Grand Rapids → Chicago → Newark
Timetable, Chicago time
06:14AA 4424 from Grand Rapids at the gate
12:00UA 3911 to Newark leaves the gate
5 h 46 apart on the timetable
The last days
AA 4424 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.