DL 543 then CI 5345 at Atlanta
St Louis → Atlanta → San Francisco
Timetable, Atlanta time
20:10DL 543 from St Louis at the gate
12:45CI 5345 to San Francisco leaves the gate
16 h 35 apart on the timetable, overnight
CI 5345 leaves 16 h 35 after DL 543 arrives on the timetable: more than half a day, so not a connection we count.