AS 655 then UA 1554 at San Francisco
Seattle → San Francisco → San Antonio
Timetable, San Francisco time
14:10AS 655 from Seattle at the gatealso QR 2003, QR 2012, QR 2139, QR 3411, QR 8856
12:00UA 1554 to San Antonio leaves the gatealso NZ 2373, AC 4347
21 h 50 apart on the timetable, overnight
UA 1554 leaves 21 h 50 after AS 655 arrives on the timetable: more than half a day, so not a connection we count.