TK 6019 then UA 5615 at O'Hare
Istanbul → Chicago → Columbus (Ohio)
Timetable, Chicago time
03:15TK 6019 from Istanbul at the gate
16:30UA 5615 to Columbus (Ohio) leaves the gate
13 h 15 apart on the timetable
UA 5615 leaves 13 h 15 after TK 6019 arrives on the timetable: more than half a day, so not a connection we count.