UA 5898 then WN 581 at Denver
Springfield → Denver → Nashville
Timetable, Denver time
10:30UA 5898 from Springfield at the gate
07:55WN 581 to Nashville leaves the gate
21 h 25 apart on the timetable, overnight
WN 581 leaves 21 h 25 after UA 5898 arrives on the timetable: more than half a day, so not a connection we count.