UA 1561 then UA 545 at San Francisco
Denver → San Francisco → Austin
Timetable, San Francisco time
13:12UA 1561 from Denver at the gatealso AC 3614, VA 8349, NZ 9074
08:40UA 545 to Austin leaves the gatealso AC 5289, VA 8467
19 h 28 apart on the timetable, overnight
UA 545 leaves 19 h 28 after UA 1561 arrives on the timetable: more than half a day, so not a connection we count.