UA 762 then FX 9791 at O'Hare
Burlington (BTV) → Chicago → Anchorage
Timetable, Chicago time
10:45UA 762 from Burlington (BTV) at the gate
04:00FX 9791 to Anchorage leaves the gate
17 h 15 apart on the timetable, overnight
FX 9791 leaves 17 h 15 after UA 762 arrives on the timetable: more than half a day, so not a connection we count.