AA 1688 then AA 2778 at Charlotte
Boston → Charlotte → Grand Rapids
Timetable, Charlotte time
10:54AA 1688 from Boston at the gate
10:20AA 2778 to Grand Rapids leaves the gate
23 h 26 apart on the timetable, overnight
AA 2778 leaves 23 h 26 after AA 1688 arrives on the timetable: more than half a day, so not a connection we count.