JL 40 then UA 4517 at Dulles
AHN → Washington → Charlotte
Timetable, Washington time
07:27JL 40 from AHN at the gate
12:43UA 4517 to Charlotte leaves the gate
5 h 16 apart on the timetable
The last days
JL 40 and UA 4517 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.