AC 3338 then UA 1496 at San Francisco
Portland (Oregon) → San Francisco → Boston
Timetable, San Francisco time
15:15AC 3338 from Portland (Oregon) at the gatealso VA 8585, NZ 9358
14:42UA 1496 to Boston leaves the gatealso VA 8307, NZ 9013
23 h 27 apart on the timetable, overnight
UA 1496 leaves 23 h 27 after AC 3338 arrives on the timetable: more than half a day, so not a connection we count.