UA 3882 then K4 550 at O'Hare
INT → Chicago → Tokyo Narita
Timetable, Chicago time
23:59UA 3882 from INT at the gate
06:10K4 550 to Tokyo Narita leaves the gate
6 h 11 apart on the timetable, overnight
The last days
UA 3882 and K4 550 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.