DL 5615 then AA 4641 at Boston
Louisville → Boston → Columbus (Ohio)
Timetable, Boston time
18:14DL 5615 from Louisville at the gate
17:59AA 4641 to Columbus (Ohio) leaves the gate
23 h 45 apart on the timetable, overnight
AA 4641 leaves 23 h 45 after DL 5615 arrives on the timetable: more than half a day, so not a connection we count.