DL 1091 then CM 1472 at San Francisco
Salt Lake City → San Francisco → Seattle
Timetable, San Francisco time
23:59DL 1091 from Salt Lake City at the gatealso VS 4542
21:05CM 1472 to Seattle leaves the gatealso UA 5579
21 h 06 apart on the timetable, overnight
CM 1472 leaves 21 h 06 after DL 1091 arrives on the timetable: more than half a day, so not a connection we count.