AA 4381 then AA 1691 at O'Hare
Grand Rapids → Chicago → Newark
Timetable, Chicago time
06:09AA 4381 from Grand Rapids at the gate
10:05AA 1691 to Newark leaves the gate
3 h 56 apart on the timetable
The last days
AA 4381 and AA 1691 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.