AA 111 then KG 733 at O'Hare
Rome → Chicago → Denver
Timetable, Chicago time
14:10AA 111 from Rome at the gate
18:15KG 733 to Denver leaves the gate
4 h 05 apart on the timetable
The last days
AA 111 and KG 733 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.