CA 1011 then UA 5517 at O'Hare
Anchorage → Chicago → Tucson
Timetable, Chicago time
17:12CA 1011 from Anchorage at the gate
08:50UA 5517 to Tucson leaves the gate
15 h 38 apart on the timetable, overnight
UA 5517 leaves 15 h 38 after CA 1011 arrives on the timetable: more than half a day, so not a connection we count.