AV 2351 then UA 433 at San Francisco
Denver → San Francisco → Seattle
Timetable, San Francisco time
19:11AV 2351 from Denver at the gate
14:10UA 433 to Seattle leaves the gate
18 h 59 apart on the timetable, overnight
UA 433 leaves 18 h 59 after AV 2351 arrives on the timetable: more than half a day, so not a connection we count.