AA 756 then WN 1774 at Miami
Norfolk → Miami → Austin
Timetable, Miami time
08:24AA 756 from Norfolk at the gate
12:00WN 1774 to Austin leaves the gate
3 h 36 apart on the timetable
The last days
AA 756 and WN 1774 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.