UA 616 then QR 2091 at San Francisco
Denver → San Francisco → Santa Ana
Timetable, San Francisco time
11:42UA 616 from Denver at the gatealso AC 5189, VA 8348, NZ 9067
09:00QR 2091 to Santa Ana leaves the gate
21 h 18 apart on the timetable, overnight
QR 2091 leaves 21 h 18 after UA 616 arrives on the timetable: more than half a day, so not a connection we count.