NH 7284 then UA 451 at San Francisco
Seattle → San Francisco → Phoenix
Timetable, San Francisco time
23:00NH 7284 from Seattle at the gate
20:55UA 451 to Phoenix leaves the gatealso CM 2428, VA 8568, LH 9346, NZ 9374
21 h 55 apart on the timetable, overnight
UA 451 leaves 21 h 55 after NH 7284 arrives on the timetable: more than half a day, so not a connection we count.