AV 2349 then UA 796 at San Francisco
Burbank → San Francisco → Boston
Timetable, San Francisco time
21:50AV 2349 from Burbank at the gate
21:30UA 796 to Boston leaves the gatealso VA 8308, NZ 9012
23 h 40 apart on the timetable, overnight
UA 796 leaves 23 h 40 after AV 2349 arrives on the timetable: more than half a day, so not a connection we count.