UA 3878 then UA 697 at Houston
IAB → Houston → San Antonio
Timetable, Houston time
22:40UA 3878 from IAB at the gate
14:30UA 697 to San Antonio leaves the gate
15 h 50 apart on the timetable, overnight
UA 697 leaves 15 h 50 after UA 3878 arrives on the timetable: more than half a day, so not a connection we count.