SY 8703 then NH 8421 at O'Hare
Denver → Chicago → Tokyo Narita
Timetable, Chicago time
02:41SY 8703 from Denver at the gate
09:30NH 8421 to Tokyo Narita leaves the gate
6 h 49 apart on the timetable
The last days
SY 8703 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.