UA 547 then UA 3907 at Houston
Kansas City → Houston → Washington
Timetable, Houston time
10:47UA 547 from Kansas City at the gate
07:00UA 3907 to Washington leaves the gate
20 h 13 apart on the timetable, overnight
UA 3907 leaves 20 h 13 after UA 547 arrives on the timetable: more than half a day, so not a connection we count.