AV 2351 then UA 901 at San Francisco
Denver → San Francisco → London
Timetable, San Francisco time
19:11AV 2351 from Denver at the gate
12:50UA 901 to London leaves the gatealso LX 3069, AC 5448, OS 7856, SN 9105, LH 9375, NZ 9830
17 h 39 apart on the timetable, overnight
UA 901 leaves 17 h 39 after AV 2351 arrives on the timetable: more than half a day, so not a connection we count.