UA 272 then BR 647 at O'Hare
New York LaGuardia → Chicago → Anchorage
Timetable, Chicago time
09:59UA 272 from New York LaGuardia at the gate
09:35BR 647 to Anchorage leaves the gate
23 h 36 apart on the timetable, overnight
BR 647 leaves 23 h 36 after UA 272 arrives on the timetable: more than half a day, so not a connection we count.