K4 601 then AA 4251 at O'Hare
Anchorage → Chicago → Sioux Falls
Timetable, Chicago time
03:10K4 601 from Anchorage at the gate
22:48AA 4251 to Sioux Falls leaves the gate
19 h 38 apart on the timetable
AA 4251 leaves 19 h 38 after K4 601 arrives on the timetable: more than half a day, so not a connection we count.