B6 519 then UA 324 at Atlanta
New York JFK → Atlanta → Chicago O'Hare
Timetable, Atlanta time
09:16B6 519 from New York JFK at the gate
22:00UA 324 to Chicago O'Hare leaves the gate
12 h 44 apart on the timetable
UA 324 leaves 12 h 44 after B6 519 arrives on the timetable: more than half a day, so not a connection we count.