UA 2661 then UA 1866 at San Francisco
Philadelphia → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
09:22UA 2661 from Philadelphia at the gatealso NH 7021, CA 7299, VA 8451, NZ 9365
23:59UA 1866 to Dallas-Fort Worth leaves the gatealso VA 8565, NZ 9081
14 h 37 apart on the timetable
UA 1866 leaves 14 h 37 after UA 2661 arrives on the timetable: more than half a day, so not a connection we count.