UA 1970 then UA 5751 at San Francisco
Cleveland → San Francisco → Eugene
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
18:25UA 5751 to Eugene leaves the gatealso LH 8568
20 h 40 apart on the timetable, overnight
UA 5751 leaves 20 h 40 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.