TK 6019 then UA 3914 at O'Hare
Istanbul → Chicago → Houston
Timetable, Chicago time
03:15TK 6019 from Istanbul at the gate
20:30UA 3914 to Houston leaves the gate
17 h 15 apart on the timetable
UA 3914 leaves 17 h 15 after TK 6019 arrives on the timetable: more than half a day, so not a connection we count.