UA 1780 then UA 2279 at San Francisco
Dallas-Fort Worth → San Francisco → Seattle
Timetable, San Francisco time
17:18UA 1780 from Dallas-Fort Worth at the gatealso AC 3148, OZ 6314, VA 8579, NZ 9092
16:17UA 2279 to Seattle leaves the gatealso AZ 4506, OZ 6401, VA 8282, NZ 9406
22 h 59 apart on the timetable, overnight
UA 2279 leaves 22 h 59 after UA 1780 arrives on the timetable: more than half a day, so not a connection we count.