F9 3227 then WN 878 at Denver
Houston → Denver → Cincinnati
Timetable, Denver time
12:30F9 3227 from Houston at the gate
11:45WN 878 to Cincinnati leaves the gate
23 h 15 apart on the timetable, overnight
WN 878 leaves 23 h 15 after F9 3227 arrives on the timetable: more than half a day, so not a connection we count.