AA 3419 then UA 2221 at Houston
Phoenix → Houston → Miami
Timetable, Houston time
23:34AA 3419 from Phoenix at the gate
08:00UA 2221 to Miami leaves the gate
8 h 26 apart on the timetable, overnight
The last days
AA 3419 and UA 2221 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.