AA 6274 then UA 1079 at San Francisco
Los Angeles → San Francisco → Seattle
Timetable, San Francisco time
09:17AA 6274 from Los Angeles at the gatealso EI 7391
21:20UA 1079 to Seattle leaves the gate
12 h 03 apart on the timetable
UA 1079 leaves 12 h 03 after AA 6274 arrives on the timetable: more than half a day, so not a connection we count.