DL 2664 then UA 571 at Atlanta
Buffalo → Atlanta → San Francisco
Timetable, Atlanta time
08:15DL 2664 from Buffalo at the gate
07:00UA 571 to San Francisco leaves the gate
22 h 45 apart on the timetable, overnight
UA 571 leaves 22 h 45 after DL 2664 arrives on the timetable: more than half a day, so not a connection we count.