UA 5191 then AA 4927 at Houston
Oklahoma City → Houston → Phoenix
Timetable, Houston time
09:30UA 5191 from Oklahoma City at the gate
18:15AA 4927 to Phoenix leaves the gate
8 h 45 apart on the timetable
The last days
UA 5191 and AA 4927 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.