UA 6228 then UA 3263 at Houston
Louisville → Houston → Richmond
Timetable, Houston time
10:55UA 6228 from Louisville at the gate
07:00UA 3263 to Richmond leaves the gate
20 h 05 apart on the timetable, overnight
UA 3263 leaves 20 h 05 after UA 6228 arrives on the timetable: more than half a day, so not a connection we count.