UA 4530 then UA 6060 at O'Hare
Chattanooga → Chicago → Lancaster
Timetable, Chicago time
19:05UA 4530 from Chattanooga at the gate
16:55UA 6060 to Lancaster leaves the gate
21 h 50 apart on the timetable, overnight
UA 6060 leaves 21 h 50 after UA 4530 arrives on the timetable: more than half a day, so not a connection we count.