WN 285 then UA 2255 at Denver
Kansas City → Denver → Boise
Timetable, Denver time
12:30WN 285 from Kansas City at the gate
11:38UA 2255 to Boise leaves the gate
23 h 08 apart on the timetable, overnight
UA 2255 leaves 23 h 08 after WN 285 arrives on the timetable: more than half a day, so not a connection we count.