UA 142 then WN 878 at Denver
Tokyo → Denver → Cincinnati
Timetable, Denver time
12:15UA 142 from Tokyo at the gate
11:45WN 878 to Cincinnati leaves the gate
23 h 30 apart on the timetable, overnight
WN 878 leaves 23 h 30 after UA 142 arrives on the timetable: more than half a day, so not a connection we count.