UA 1561 then AC 3774 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
12:06AC 3774 to Austin leaves the gatealso NZ 9137
22 h 54 apart on the timetable, overnight
AC 3774 leaves 22 h 54 after UA 1561 arrives on the timetable: more than half a day, so not a connection we count.