DL 1843 then BR 651 at O'Hare
Boston → Chicago → Anchorage
Timetable, Chicago time
09:48DL 1843 from Boston at the gate
13:35BR 651 to Anchorage leaves the gate
3 h 47 apart on the timetable
The last days
DL 1843 and BR 651 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.