WN 280 then WN 500 at Denver
Boston → Denver → Kansas City
Timetable, Denver time
12:45WN 280 from Boston at the gate
07:30WN 500 to Kansas City leaves the gate
18 h 45 apart on the timetable, overnight
WN 500 leaves 18 h 45 after WN 280 arrives on the timetable: more than half a day, so not a connection we count.