UA 4381 then KD 211 at O'Hare
Buffalo → Chicago → Anchorage
Timetable, Chicago time
14:55UA 4381 from Buffalo at the gate
12:00KD 211 to Anchorage leaves the gate
21 h 05 apart on the timetable, overnight
KD 211 leaves 21 h 05 after UA 4381 arrives on the timetable: more than half a day, so not a connection we count.