AA 3100 then AA 4008 at Miami
Houston → Miami → Jacksonville
Timetable, Miami time
13:24AA 3100 from Houston at the gate
17:04AA 4008 to Jacksonville leaves the gate
3 h 40 apart on the timetable
The last days
AA 3100 and AA 4008 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.