UA 1970 then AA 1837 at San Francisco
Cleveland → San Francisco → Phoenix
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
16:00AA 1837 to Phoenix leaves the gatealso QR 9224
18 h 15 apart on the timetable, overnight
AA 1837 leaves 18 h 15 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.