TK 6039 then UA 5940 at O'Hare
Istanbul → Chicago → Tucson
Timetable, Chicago time
07:50TK 6039 from Istanbul at the gate
19:54UA 5940 to Tucson leaves the gate
12 h 04 apart on the timetable
UA 5940 leaves 12 h 04 after TK 6039 arrives on the timetable: more than half a day, so not a connection we count.