AA 899 then UA 1369 at O'Hare
Los Angeles → Chicago → Washington National
Timetable, Chicago time
06:00AA 899 from Los Angeles at the gate
18:04UA 1369 to Washington National leaves the gate
12 h 04 apart on the timetable
UA 1369 leaves 12 h 04 after AA 899 arrives on the timetable: more than half a day, so not a connection we count.