AA 5063 then WN 1572 at Atlanta
Charlotte → Atlanta → Denver
Timetable, Atlanta time
08:42AA 5063 from Charlotte at the gate
18:40WN 1572 to Denver leaves the gate
9 h 58 apart on the timetable
The last days
AA 5063 and WN 1572 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.