BR 608 then AA 2537 at O'Hare
Anchorage → Chicago → Tucson
Timetable, Chicago time
20:03BR 608 from Anchorage at the gate
11:45AA 2537 to Tucson leaves the gate
15 h 42 apart on the timetable, overnight
AA 2537 leaves 15 h 42 after BR 608 arrives on the timetable: more than half a day, so not a connection we count.