AA 4778 then UA 3754 at Houston
Philadelphia → Houston → College Station
Timetable, Houston time
13:55AA 4778 from Philadelphia at the gate
10:00UA 3754 to College Station leaves the gate
20 h 05 apart on the timetable, overnight
UA 3754 leaves 20 h 05 after AA 4778 arrives on the timetable: more than half a day, so not a connection we count.