UA 4395 then TK 6060 at O'Hare
St Louis → Chicago → Istanbul
Timetable, Chicago time
12:29UA 4395 from St Louis at the gate
12:00TK 6060 to Istanbul leaves the gate
23 h 31 apart on the timetable, overnight
TK 6060 leaves 23 h 31 after UA 4395 arrives on the timetable: more than half a day, so not a connection we count.