UA 3909 then AA 148 at San Francisco
Chicago O'Hare → San Francisco → New York JFK
Timetable, San Francisco time
22:20UA 3909 from Chicago O'Hare at the gate
15:32AA 148 to New York JFK leaves the gatealso QF 3205, FJ 5007
17 h 12 apart on the timetable, overnight
AA 148 leaves 17 h 12 after UA 3909 arrives on the timetable: more than half a day, so not a connection we count.