UA 1970 then DL 668 at San Francisco
Cleveland → San Francisco → New York JFK
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
11:45DL 668 to New York JFK leaves the gatealso UX 3429, LY 4440, VS 4762, LA 6225, LA 6342, KL 7014, KL 7260
14 h apart on the timetable, overnight
DL 668 leaves 14 h after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.