UA 3913 then UA 256 at Houston
Denver → Houston → Kralendijk
Timetable, Houston time
21:22UA 3913 from Denver at the gate
12:11UA 256 to Kralendijk leaves the gate
14 h 49 apart on the timetable, overnight
UA 256 leaves 14 h 49 after UA 3913 arrives on the timetable: more than half a day, so not a connection we count.