UA 3874 then CM 229 at O'Hare
Chicago Rockford → Chicago → Tocumen
Timetable, Chicago time
01:21UA 3874 from Chicago Rockford at the gate
14:13CM 229 to Tocumen leaves the gate
12 h 52 apart on the timetable
CM 229 leaves 12 h 52 after UA 3874 arrives on the timetable: more than half a day, so not a connection we count.