UA 2278 then UA 451 at San Francisco
San Diego → San Francisco → Phoenix
Timetable, San Francisco time
21:25UA 2278 from San Diego at the gatealso CM 2519, AC 4236, OZ 6308, VA 8439
20:55UA 451 to Phoenix leaves the gatealso CM 2428, VA 8568, LH 9346, NZ 9374
23 h 30 apart on the timetable, overnight
UA 451 leaves 23 h 30 after UA 2278 arrives on the timetable: more than half a day, so not a connection we count.