UA 4734 then UA 785 at San Francisco
Eugene → San Francisco → Washington
Timetable, San Francisco time
13:16UA 4734 from Eugene at the gatealso EK 6064, LH 8741
06:15UA 785 to Washington leaves the gatealso AZ 4408, NZ 9160
16 h 59 apart on the timetable, overnight
UA 785 leaves 16 h 59 after UA 4734 arrives on the timetable: more than half a day, so not a connection we count.