UA 3914 then UA 437 at Houston
Chicago → Houston → Georgetown (Guyana)
Timetable, Houston time
23:27UA 3914 from Chicago at the gate
16:20UA 437 to Georgetown (Guyana) leaves the gate
16 h 53 apart on the timetable, overnight
UA 437 leaves 16 h 53 after UA 3914 arrives on the timetable: more than half a day, so not a connection we count.