AA 9914 then GG 9723 at O'Hare
Detroit → Chicago → Tokyo Narita
Timetable, Chicago time
10:20AA 9914 from Detroit at the gate
10:30GG 9723 to Tokyo Narita leaves the gate
10 min apart on the timetable
The last days
AA 9914 and GG 9723 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.