UA 986 then BR 643 at O'Hare
Paris Charles de Gaulle → Chicago → Anchorage
Timetable, Chicago time
14:05UA 986 from Paris Charles de Gaulle at the gate
11:55BR 643 to Anchorage leaves the gate
21 h 50 apart on the timetable, overnight
BR 643 leaves 21 h 50 after UA 986 arrives on the timetable: more than half a day, so not a connection we count.