AA 1949 then UA 3912 at San Francisco
Dallas-Fort Worth → San Francisco → Houston
Timetable, San Francisco time
09:01AA 1949 from Dallas-Fort Worth at the gatealso IB 4292
23:00UA 3912 to Houston leaves the gate
13 h 59 apart on the timetable
UA 3912 leaves 13 h 59 after AA 1949 arrives on the timetable: more than half a day, so not a connection we count.