AV 2347 then UA 901 at San Francisco
Burbank → San Francisco → London
Timetable, San Francisco time
20:08AV 2347 from Burbank at the gate
12:50UA 901 to London leaves the gatealso LX 3069, AC 5448, OS 7856, SN 9105, LH 9375, NZ 9830
16 h 42 apart on the timetable, overnight
UA 901 leaves 16 h 42 after AV 2347 arrives on the timetable: more than half a day, so not a connection we count.