KE 3643 then DL 381 at San Francisco
Atlanta → San Francisco → Austin
Timetable, San Francisco time
10:26KE 3643 from Atlanta at the gatealso MU 8849
10:04DL 381 to Austin leaves the gate
23 h 38 apart on the timetable, overnight
DL 381 leaves 23 h 38 after KE 3643 arrives on the timetable: more than half a day, so not a connection we count.