AA 3402 then AA 3141 at O'Hare
Lansing → Chicago → San Francisco
Timetable, Chicago time
16:30AA 3402 from Lansing at the gate
17:10AA 3141 to San Francisco leaves the gate
40 min apart on the timetable
The last days
AA 3402 and AA 3141 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.