AA 4545 then UA 6060 at O'Hare
Tulsa → Chicago → Lancaster
Timetable, Chicago time
20:05AA 4545 from Tulsa at the gate
16:55UA 6060 to Lancaster leaves the gate
20 h 50 apart on the timetable, overnight
UA 6060 leaves 20 h 50 after AA 4545 arrives on the timetable: more than half a day, so not a connection we count.