DL 1007 then UA 1848 at Atlanta
Washington National → Atlanta → San Francisco
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
19:18UA 1848 to San Francisco leaves the gate
21 h 37 apart on the timetable, overnight
UA 1848 leaves 21 h 37 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.