UA 3999 then TK 134 at Houston
Colorado Springs → Houston → Istanbul
Timetable, Houston time
15:28UA 3999 from Colorado Springs at the gate
15:05TK 134 to Istanbul leaves the gate
23 h 37 apart on the timetable, overnight
TK 134 leaves 23 h 37 after UA 3999 arrives on the timetable: more than half a day, so not a connection we count.