UA 1267 then DL 2171 at Detroit
San Francisco → Detroit → Fort Lauderdale
Timetable, Detroit time
06:42UA 1267 from San Francisco at the gate
18:58DL 2171 to Fort Lauderdale leaves the gate
12 h 16 apart on the timetable
DL 2171 leaves 12 h 16 after UA 1267 arrives on the timetable: more than half a day, so not a connection we count.