AA 9919 then UA 2224 at Phoenix
Tucson → Phoenix → Houston
Timetable, Phoenix time
12:15AA 9919 from Tucson at the gate
13:29UA 2224 to Houston leaves the gate
1 h 14 apart on the timetable
The last days
AA 9919 and UA 2224 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.