AA 518 then AA 3490 at O'Hare
San Diego → Chicago → Grand Rapids
Timetable, Chicago time
12:42AA 518 from San Diego at the gate
13:40AA 3490 to Grand Rapids leaves the gate
58 min apart on the timetable
The last days
AA 518 and AA 3490 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.