UA 1970 then UA 1603 at San Francisco
Cleveland → San Francisco → Atlanta
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
21:30UA 1603 to Atlanta leaves the gatealso CA 7245, VA 8401, NZ 9000
23 h 45 apart on the timetable, overnight
UA 1603 leaves 23 h 45 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.