TK 6059 then UA 5423 at O'Hare
New York JFK → Chicago → Lexington
Timetable, Chicago time
09:00TK 6059 from New York JFK at the gate
21:30UA 5423 to Lexington leaves the gate
12 h 30 apart on the timetable
UA 5423 leaves 12 h 30 after TK 6059 arrives on the timetable: more than half a day, so not a connection we count.