UA 8219 then CX 99 at O'Hare
San Francisco → Chicago → Anchorage
Timetable, Chicago time
23:54UA 8219 from San Francisco at the gate
21:15CX 99 to Anchorage leaves the gate
21 h 21 apart on the timetable, overnight
CX 99 leaves 21 h 21 after UA 8219 arrives on the timetable: more than half a day, so not a connection we count.