CI 5240 then UA 1656 at O'Hare
Anchorage → Chicago → Cancún
Timetable, Chicago time
19:25CI 5240 from Anchorage at the gate
09:02UA 1656 to Cancún leaves the gate
13 h 37 apart on the timetable, overnight
UA 1656 leaves 13 h 37 after CI 5240 arrives on the timetable: more than half a day, so not a connection we count.