B6 833 then UA 1554 at San Francisco
Boston → San Francisco → San Antonio
Timetable, San Francisco time
13:16B6 833 from Boston at the gatealso FI 7969
12:00UA 1554 to San Antonio leaves the gatealso NZ 2373, AC 4347
22 h 44 apart on the timetable, overnight
UA 1554 leaves 22 h 44 after B6 833 arrives on the timetable: more than half a day, so not a connection we count.