AS 328 then CZ 2502 at O'Hare
Seattle (SEA) → Chicago → Shanghai
Timetable, Chicago time
05:40AS 328 from Seattle (SEA) at the gate
01:45CZ 2502 to Shanghai leaves the gate
20 h 05 apart on the timetable, overnight
CZ 2502 leaves 20 h 05 after AS 328 arrives on the timetable: more than half a day, so not a connection we count.