AA 5191 then UA 2058 at Charlotte
Knoxville → Charlotte → Houston
Timetable, Charlotte time
07:29AA 5191 from Knoxville at the gate
11:37UA 2058 to Houston leaves the gate
4 h 08 apart on the timetable
The last days
AA 5191 and UA 2058 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.