DL 1091 then NZ 9166 at San Francisco
Salt Lake City → San Francisco → Washington
Timetable, San Francisco time
23:59DL 1091 from Salt Lake City at the gatealso VS 4542
23:20NZ 9166 to Washington leaves the gate
23 h 21 apart on the timetable, overnight
NZ 9166 leaves 23 h 21 after DL 1091 arrives on the timetable: more than half a day, so not a connection we count.