PR 3897 then UA 581 at San Francisco
Los Angeles → San Francisco → Cleveland
Timetable, San Francisco time
18:02PR 3897 from Los Angeles at the gatealso PD 6294
12:45UA 581 to Cleveland leaves the gate
18 h 43 apart on the timetable, overnight
UA 581 leaves 18 h 43 after PR 3897 arrives on the timetable: more than half a day, so not a connection we count.