UA 4179 then AA 4271 at O'Hare
Roanoke → Chicago → Allentown
Timetable, Chicago time
07:44UA 4179 from Roanoke at the gate
19:53AA 4271 to Allentown leaves the gate
12 h 09 apart on the timetable
AA 4271 leaves 12 h 09 after UA 4179 arrives on the timetable: more than half a day, so not a connection we count.