B6 115 then UA 3912 at San Francisco
New York JFK → San Francisco → Houston
Timetable, San Francisco time
09:30B6 115 from New York JFK at the gatealso LO 5771
23:00UA 3912 to Houston leaves the gate
13 h 30 apart on the timetable
UA 3912 leaves 13 h 30 after B6 115 arrives on the timetable: more than half a day, so not a connection we count.