KE 91 then DL 5654 at Boston
Seoul → Boston → Columbus (Ohio)
Timetable, Boston time
08:50KE 91 from Seoul at the gate
08:11DL 5654 to Columbus (Ohio) leaves the gate
23 h 21 apart on the timetable, overnight
DL 5654 leaves 23 h 21 after KE 91 arrives on the timetable: more than half a day, so not a connection we count.