UA 686 then UA 3754 at Houston
San Francisco → Houston → College Station
Timetable, Houston time
13:08UA 686 from San Francisco at the gate
10:00UA 3754 to College Station leaves the gate
20 h 52 apart on the timetable, overnight
UA 3754 leaves 20 h 52 after UA 686 arrives on the timetable: more than half a day, so not a connection we count.