AA 1239 then AA 9917 at O'Hare
Boston → Chicago → Cedar Rapids
Timetable, Chicago time
10:30AA 1239 from Boston at the gate
15:00AA 9917 to Cedar Rapids leaves the gate
4 h 30 apart on the timetable
Today
From the airport’s board at 21:43 Chicago time
09:48AA 1239 reached the gate42 min early
18:24AA 9917 left the gate3 h 24 late
8 h 36 between the gates
The last days
AA 1239 and AA 9917 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.