UA 2492 then UA 2837 at San Francisco
Los Angeles → San Francisco → Washington
Timetable, San Francisco time
07:30UA 2492 from Los Angeles at the gatealso NH 7357, VA 8059
23:20UA 2837 to Washington leaves the gate
15 h 50 apart on the timetable
UA 2837 leaves 15 h 50 after UA 2492 arrives on the timetable: more than half a day, so not a connection we count.