CV 251 then AA 249 at O'Hare
Anchorage → Chicago → Mexico City
Timetable, Chicago time
19:00CV 251 from Anchorage at the gate
08:45AA 249 to Mexico City leaves the gate
13 h 45 apart on the timetable, overnight
AA 249 leaves 13 h 45 after CV 251 arrives on the timetable: more than half a day, so not a connection we count.