UA 335 then AC 4021 at San Francisco
Eugene → San Francisco → Calgary
Timetable, San Francisco time
08:40UA 335 from Eugene at the gatealso NZ 9173
08:37AC 4021 to Calgary leaves the gatealso NZ 9881
23 h 57 apart on the timetable, overnight
AC 4021 leaves 23 h 57 after UA 335 arrives on the timetable: more than half a day, so not a connection we count.