UA 382 then UA 3235 at Houston
Washington National → Houston → St Louis
Timetable, Houston time
15:29UA 382 from Washington National at the gate
06:30UA 3235 to St Louis leaves the gate
15 h 01 apart on the timetable, overnight
UA 3235 leaves 15 h 01 after UA 382 arrives on the timetable: more than half a day, so not a connection we count.