AA 1816 then AA 2559 at Charlotte
Key West → Charlotte → Detroit
Timetable, Charlotte time
14:50AA 1816 from Key West at the gate
20:51AA 2559 to Detroit leaves the gate
6 h 01 apart on the timetable
The last days
AA 1816 and AA 2559 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.