AA 2644 then 5Y 7643 at O'Hare
Pittsburgh → Chicago → Tokyo Narita
Timetable, Chicago time
09:05AA 2644 from Pittsburgh at the gate
11:305Y 7643 to Tokyo Narita leaves the gate
2 h 25 apart on the timetable
The last days
AA 2644 and 5Y 7643 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.