AA 1509 then K4 590 at O'Hare
Boston → Chicago → Anchorage
Timetable, Chicago time
09:05AA 1509 from Boston at the gate
17:45K4 590 to Anchorage leaves the gate
8 h 40 apart on the timetable
The last days
AA 1509 and K4 590 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.