AA 5377 then AA 2686 at Charlotte
Rochester → Charlotte → St Louis
Timetable, Charlotte time
13:55AA 5377 from Rochester at the gate
18:17AA 2686 to St Louis leaves the gate
4 h 22 apart on the timetable
The last days
AA 5377 and AA 2686 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.