UA 3878 then UA 281 at Houston
CWF → Houston → Denver
Timetable, Houston time
10:46UA 3878 from CWF at the gate
09:40UA 281 to Denver leaves the gate
22 h 54 apart on the timetable, overnight
UA 281 leaves 22 h 54 after UA 3878 arrives on the timetable: more than half a day, so not a connection we count.