DL 545 then UA 1259 at San Francisco
Atlanta → San Francisco → Houston
Timetable, San Francisco time
22:49DL 545 from Atlanta at the gatealso AM 3230, VS 5287
10:53UA 1259 to Houston leaves the gatealso EK 6364, VA 8078, NZ 9197
12 h 04 apart on the timetable, overnight
UA 1259 leaves 12 h 04 after DL 545 arrives on the timetable: more than half a day, so not a connection we count.