AV 2183 then UA 2139 at San Francisco
Vancouver → San Francisco → Liberia
Timetable, San Francisco time
15:27AV 2183 from Vancouver at the gate
10:20UA 2139 to Liberia leaves the gate
18 h 53 apart on the timetable, overnight
UA 2139 leaves 18 h 53 after AV 2183 arrives on the timetable: more than half a day, so not a connection we count.