WN 570 then WN 787 at Boston
St Louis → Boston → Nashville
Timetable, Boston time
09:30WN 570 from St Louis at the gate
08:10WN 787 to Nashville leaves the gate
22 h 40 apart on the timetable, overnight
WN 787 leaves 22 h 40 after WN 570 arrives on the timetable: more than half a day, so not a connection we count.