B6 111 then FX 9791 at O'Hare
Boston → Chicago → Anchorage
Timetable, Chicago time
12:00B6 111 from Boston at the gate
04:00FX 9791 to Anchorage leaves the gate
16 h apart on the timetable, overnight
FX 9791 leaves 16 h after B6 111 arrives on the timetable: more than half a day, so not a connection we count.