CV 78 then AA 4271 at O'Hare
Dallas-Fort Worth → Chicago → Allentown
Timetable, Chicago time
20:02CV 78 from Dallas-Fort Worth at the gate
19:49AA 4271 to Allentown leaves the gate
23 h 47 apart on the timetable, overnight
AA 4271 leaves 23 h 47 after CV 78 arrives on the timetable: more than half a day, so not a connection we count.