AA 2123 then UA 1394 at O'Hare
Los Angeles → Chicago → San Antonio
Timetable, Chicago time
19:59AA 2123 from Los Angeles at the gate
19:52UA 1394 to San Antonio leaves the gate
23 h 53 apart on the timetable, overnight
UA 1394 leaves 23 h 53 after AA 2123 arrives on the timetable: more than half a day, so not a connection we count.