UA 454 then CV 251 at O'Hare
Orlando → Chicago → Dallas-Fort Worth
Timetable, Chicago time
09:08UA 454 from Orlando at the gate
03:00CV 251 to Dallas-Fort Worth leaves the gate
17 h 52 apart on the timetable, overnight
CV 251 leaves 17 h 52 after UA 454 arrives on the timetable: more than half a day, so not a connection we count.