AA 2245 then CZ 2508 at O'Hare
Sacramento → Chicago → Guangzhou
Timetable, Chicago time
20:04AA 2245 from Sacramento at the gate
19:50CZ 2508 to Guangzhou leaves the gate
23 h 46 apart on the timetable, overnight
CZ 2508 leaves 23 h 46 after AA 2245 arrives on the timetable: more than half a day, so not a connection we count.