UA 6252 then TK 188 at Dulles
Jacksonville → Washington → Istanbul
Timetable, Washington time
13:35UA 6252 from Jacksonville at the gate
13:30TK 188 to Istanbul leaves the gate
23 h 55 apart on the timetable, overnight
TK 188 leaves 23 h 55 after UA 6252 arrives on the timetable: more than half a day, so not a connection we count.