DL 681 then UA 1646 at San Francisco
Atlanta → San Francisco → Baltimore
Timetable, San Francisco time
21:49DL 681 from Atlanta at the gatealso AF 2199, AM 3345, VS 5285, LA 6594
21:30UA 1646 to Baltimore leaves the gatealso NZ 9032
23 h 41 apart on the timetable, overnight
UA 1646 leaves 23 h 41 after DL 681 arrives on the timetable: more than half a day, so not a connection we count.