AA 6331 then FX 9791 at O'Hare
Burlington (BTV) → Chicago → Anchorage
Timetable, Chicago time
08:59AA 6331 from Burlington (BTV) at the gate
04:00FX 9791 to Anchorage leaves the gate
19 h 01 apart on the timetable, overnight
FX 9791 leaves 19 h 01 after AA 6331 arrives on the timetable: more than half a day, so not a connection we count.