AC 4121 then AC 3774 at San Francisco
Ontario → San Francisco → Austin
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
13:50AC 3774 to Austin leaves the gatealso NZ 9137
20 h apart on the timetable, overnight
AC 3774 leaves 20 h after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.