UA 5076 then CV 251 at O'Hare
Paducah → Chicago → Dallas-Fort Worth
Timetable, Chicago time
06:59UA 5076 from Paducah at the gate
03:00CV 251 to Dallas-Fort Worth leaves the gate
20 h 01 apart on the timetable, overnight
CV 251 leaves 20 h 01 after UA 5076 arrives on the timetable: more than half a day, so not a connection we count.