AA 4454 then UA 2106 at O'Hare
Indianapolis → Chicago → San Francisco
Timetable, Chicago time
06:00AA 4454 from Indianapolis at the gate
21:57UA 2106 to San Francisco leaves the gate
15 h 57 apart on the timetable
UA 2106 leaves 15 h 57 after AA 4454 arrives on the timetable: more than half a day, so not a connection we count.