UA 2225 then VA 8079 at San Francisco
Philadelphia → San Francisco → Houston
Timetable, San Francisco time
12:32UA 2225 from Philadelphia at the gatealso NZ 9367
12:00VA 8079 to Houston leaves the gatealso NZ 9195
23 h 28 apart on the timetable, overnight
VA 8079 leaves 23 h 28 after UA 2225 arrives on the timetable: more than half a day, so not a connection we count.