UA 3752 then AV 2036 at San Francisco
Denver → San Francisco → Seattle
Timetable, San Francisco time
13:00UA 3752 from Denver at the gate
07:25AV 2036 to Seattle leaves the gate
18 h 25 apart on the timetable, overnight
AV 2036 leaves 18 h 25 after UA 3752 arrives on the timetable: more than half a day, so not a connection we count.