CZ 435 then AA 2279 at O'Hare
Anchorage → Chicago → San Juan
Timetable, Chicago time
15:58CZ 435 from Anchorage at the gate
08:05AA 2279 to San Juan leaves the gate
16 h 07 apart on the timetable, overnight
AA 2279 leaves 16 h 07 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.