AA 1849 then SQ 31 at San Francisco
Dallas-Fort Worth → San Francisco → Singapore
Timetable, San Francisco time
10:16AA 1849 from Dallas-Fort Worth at the gate
09:40SQ 31 to Singapore leaves the gate
23 h 24 apart on the timetable, overnight
SQ 31 leaves 23 h 24 after AA 1849 arrives on the timetable: more than half a day, so not a connection we count.