AA 1983 then WN 1758 at Phoenix
Miami → Phoenix → St Louis
Timetable, Phoenix time
09:35AA 1983 from Miami at the gate
18:15WN 1758 to St Louis leaves the gate
8 h 40 apart on the timetable
The last days
AA 1983 and WN 1758 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.