UA 426 then CV 251 at O'Hare
Detroit → Chicago → Dallas-Fort Worth
Timetable, Chicago time
08:00UA 426 from Detroit at the gate
03:00CV 251 to Dallas-Fort Worth leaves the gate
19 h apart on the timetable, overnight
CV 251 leaves 19 h after UA 426 arrives on the timetable: more than half a day, so not a connection we count.