UA 4179 then AA 431 at O'Hare
Roanoke → Chicago → San Antonio
Timetable, Chicago time
07:44UA 4179 from Roanoke at the gate
20:59AA 431 to San Antonio leaves the gate
13 h 15 apart on the timetable
AA 431 leaves 13 h 15 after UA 4179 arrives on the timetable: more than half a day, so not a connection we count.