UA 900 then UA 3906 at San Francisco
London → San Francisco → Newark
Timetable, San Francisco time
13:20UA 900 from London at the gatealso LX 3042, AC 5375, OS 7857, SN 9099, LH 9374, NZ 9831
07:00UA 3906 to Newark leaves the gate
17 h 40 apart on the timetable, overnight
UA 3906 leaves 17 h 40 after UA 900 arrives on the timetable: more than half a day, so not a connection we count.