UA 225 then AC 3994 at San Francisco
Philadelphia → San Francisco → Boise
Timetable, San Francisco time
21:43UA 225 from Philadelphia at the gatealso VA 8238, NZ 9366
18:30AC 3994 to Boise leaves the gatealso UA 5644
20 h 47 apart on the timetable, overnight
AC 3994 leaves 20 h 47 after UA 225 arrives on the timetable: more than half a day, so not a connection we count.