AA 1253 then QR 2091 at San Francisco
Chicago O'Hare → San Francisco → Santa Ana
Timetable, San Francisco time
09:40AA 1253 from Chicago O'Hare at the gatealso QF 4697
09:00QR 2091 to Santa Ana leaves the gate
23 h 20 apart on the timetable, overnight
QR 2091 leaves 23 h 20 after AA 1253 arrives on the timetable: more than half a day, so not a connection we count.