TK 6039 then F9 3647 at O'Hare
Istanbul → Chicago → Las Vegas
Timetable, Chicago time
20:28TK 6039 from Istanbul at the gate
17:15F9 3647 to Las Vegas leaves the gate
20 h 47 apart on the timetable, overnight
F9 3647 leaves 20 h 47 after TK 6039 arrives on the timetable: more than half a day, so not a connection we count.