UA 367 then SQ 1542 at San Francisco
Washington → San Francisco → Fort Lauderdale
Timetable, San Francisco time
01:29UA 367 from Washington at the gatealso LH 7530, VA 8388, NZ 9181
23:25SQ 1542 to Fort Lauderdale leaves the gatealso AD 7729
21 h 56 apart on the timetable
SQ 1542 leaves 21 h 56 after UA 367 arrives on the timetable: more than half a day, so not a connection we count.