UA 3280 then UA 4050 at Houston
Greensboro → Houston → Louisville
Timetable, Houston time
20:30UA 3280 from Greensboro at the gate
17:10UA 4050 to Louisville leaves the gate
20 h 40 apart on the timetable, overnight
UA 4050 leaves 20 h 40 after UA 3280 arrives on the timetable: more than half a day, so not a connection we count.