DL 3140 then UA 571 at Atlanta
Dayton → Atlanta → San Francisco
Timetable, Atlanta time
07:48DL 3140 from Dayton at the gate
07:00UA 571 to San Francisco leaves the gate
23 h 12 apart on the timetable, overnight
UA 571 leaves 23 h 12 after DL 3140 arrives on the timetable: more than half a day, so not a connection we count.