WN 4626 then B6 394 at Denver
Nashville → Denver → Boston
Timetable, Denver time
18:00WN 4626 from Nashville at the gate
12:05B6 394 to Boston leaves the gate
18 h 05 apart on the timetable, overnight
B6 394 leaves 18 h 05 after WN 4626 arrives on the timetable: more than half a day, so not a connection we count.