UA 3911 then UA 1002 at Houston
Washington → Houston → Quito
Timetable, Houston time
00:06UA 3911 from Washington at the gate
18:15UA 1002 to Quito leaves the gate
18 h 09 apart on the timetable
UA 1002 leaves 18 h 09 after UA 3911 arrives on the timetable: more than half a day, so not a connection we count.