AA 434 then NH 8421 at O'Hare
San Francisco → Chicago → Tokyo Narita
Timetable, Chicago time
06:59AA 434 from San Francisco at the gate
09:15NH 8421 to Tokyo Narita leaves the gate
2 h 16 apart on the timetable
The last days
AA 434 and NH 8421 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.