UA 3501 then AA 1487 at O'Hare
Detroit → Chicago → San Antonio
Timetable, Chicago time
06:57UA 3501 from Detroit at the gate
20:53AA 1487 to San Antonio leaves the gate
13 h 56 apart on the timetable
AA 1487 leaves 13 h 56 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.