UA 100 then AA 4407 at Houston
Sydney → Houston → Miami
Timetable, Houston time
07:55UA 100 from Sydney at the gate
13:30AA 4407 to Miami leaves the gate
5 h 35 apart on the timetable
The last days
UA 100 and AA 4407 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.