UA 2158 then UA 3263 at Houston
San Antonio → Houston → Richmond
Timetable, Houston time
15:27UA 2158 from San Antonio at the gate
07:00UA 3263 to Richmond leaves the gate
15 h 33 apart on the timetable, overnight
UA 3263 leaves 15 h 33 after UA 2158 arrives on the timetable: more than half a day, so not a connection we count.