AA 4537 then Y8 7456 at O'Hare
San Antonio → Chicago → Shanghai
Timetable, Chicago time
21:53AA 4537 from San Antonio at the gate
19:10Y8 7456 to Shanghai leaves the gate
21 h 17 apart on the timetable, overnight
Y8 7456 leaves 21 h 17 after AA 4537 arrives on the timetable: more than half a day, so not a connection we count.