UA 751 then KZ 141 at O'Hare
Charlotte → Chicago → Tokyo Narita
Timetable, Chicago time
07:26UA 751 from Charlotte at the gate
12:10KZ 141 to Tokyo Narita leaves the gate
4 h 44 apart on the timetable
The last days
UA 751 and KZ 141 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.