DL 420 then BR 643 at O'Hare
Savannah → Chicago → Anchorage
Timetable, Chicago time
13:13DL 420 from Savannah at the gate
11:55BR 643 to Anchorage leaves the gate
22 h 42 apart on the timetable, overnight
BR 643 leaves 22 h 42 after DL 420 arrives on the timetable: more than half a day, so not a connection we count.