UA 1366 then UA 3263 at Houston
Nashville → Houston → Richmond
Timetable, Houston time
15:17UA 1366 from Nashville at the gate
07:00UA 3263 to Richmond leaves the gate
15 h 43 apart on the timetable, overnight
UA 3263 leaves 15 h 43 after UA 1366 arrives on the timetable: more than half a day, so not a connection we count.