UA 1970 then AA 2642 at San Francisco
Cleveland → San Francisco → Chicago O'Hare
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
15:18AA 2642 to Chicago O'Hare leaves the gatealso BA 5612, GF 6849
17 h 33 apart on the timetable, overnight
AA 2642 leaves 17 h 33 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.