AV 2267 then UA 1496 at San Francisco
Medford → San Francisco → Boston
Timetable, San Francisco time
21:20AV 2267 from Medford at the gate
14:42UA 1496 to Boston leaves the gatealso VA 8307, NZ 9013
17 h 22 apart on the timetable, overnight
UA 1496 leaves 17 h 22 after AV 2267 arrives on the timetable: more than half a day, so not a connection we count.