TK 6023 then CZ 2504 at O'Hare
Istanbul → Chicago → Shanghai
Timetable, Chicago time
06:25TK 6023 from Istanbul at the gate
19:15CZ 2504 to Shanghai leaves the gate
12 h 50 apart on the timetable
CZ 2504 leaves 12 h 50 after TK 6023 arrives on the timetable: more than half a day, so not a connection we count.