UA 4500 then TK 188 at Dulles
Detroit → Washington → Istanbul
Timetable, Washington time
21:17UA 4500 from Detroit at the gate
13:30TK 188 to Istanbul leaves the gate
16 h 13 apart on the timetable, overnight
TK 188 leaves 16 h 13 after UA 4500 arrives on the timetable: more than half a day, so not a connection we count.