UA 3914 then UA 701 at Houston
Chicago → Houston → San Juan
Timetable, Houston time
23:27UA 3914 from Chicago at the gate
15:05UA 701 to San Juan leaves the gate
15 h 38 apart on the timetable, overnight
UA 701 leaves 15 h 38 after UA 3914 arrives on the timetable: more than half a day, so not a connection we count.