K4 221 then AA 2748 at O'Hare
Anchorage → Chicago → Las Vegas
Timetable, Chicago time
13:41K4 221 from Anchorage at the gate
11:00AA 2748 to Las Vegas leaves the gate
21 h 19 apart on the timetable, overnight
AA 2748 leaves 21 h 19 after K4 221 arrives on the timetable: more than half a day, so not a connection we count.