AC 4589 then QR 2091 at San Francisco
Santa Ana → San Francisco → Santa Ana
Timetable, San Francisco time
11:20AC 4589 from Santa Ana at the gatealso UA 5479, VA 8497
09:00QR 2091 to Santa Ana leaves the gate
21 h 40 apart on the timetable, overnight
QR 2091 leaves 21 h 40 after AC 4589 arrives on the timetable: more than half a day, so not a connection we count.