UA 1398 then BR 665 at Atlanta
Chicago O'Hare → Atlanta → Anchorage
Timetable, Atlanta time
21:27UA 1398 from Chicago O'Hare at the gate
18:45BR 665 to Anchorage leaves the gate
21 h 18 apart on the timetable, overnight
BR 665 leaves 21 h 18 after UA 1398 arrives on the timetable: more than half a day, so not a connection we count.