AA 353 then AA 4126 at Miami
Boston → Miami → Jacksonville
Timetable, Miami time
18:43AA 353 from Boston at the gate
18:35AA 4126 to Jacksonville leaves the gate
23 h 52 apart on the timetable, overnight
AA 4126 leaves 23 h 52 after AA 353 arrives on the timetable: more than half a day, so not a connection we count.