DL 2251 then UA 5539 at O'Hare
New York LaGuardia → Chicago → Moline
Timetable, Chicago time
07:42DL 2251 from New York LaGuardia at the gate
21:47UA 5539 to Moline leaves the gate
14 h 05 apart on the timetable
UA 5539 leaves 14 h 05 after DL 2251 arrives on the timetable: more than half a day, so not a connection we count.