QF 3771 then UA 2837 at San Francisco
Los Angeles → San Francisco → Washington
Timetable, San Francisco time
10:26QF 3771 from Los Angeles at the gate
23:20UA 2837 to Washington leaves the gate
12 h 54 apart on the timetable
UA 2837 leaves 12 h 54 after QF 3771 arrives on the timetable: more than half a day, so not a connection we count.