K4 523 then IB 342 at O'Hare
Anchorage → Chicago → Madrid
Timetable, Chicago time
20:33K4 523 from Anchorage at the gate
17:40IB 342 to Madrid leaves the gate
21 h 07 apart on the timetable, overnight
IB 342 leaves 21 h 07 after K4 523 arrives on the timetable: more than half a day, so not a connection we count.