DL 2453 then UA 571 at Atlanta
Grand Rapids → Atlanta → San Francisco
Timetable, Atlanta time
08:05DL 2453 from Grand Rapids at the gate
07:00UA 571 to San Francisco leaves the gate
22 h 55 apart on the timetable, overnight
UA 571 leaves 22 h 55 after DL 2453 arrives on the timetable: more than half a day, so not a connection we count.