AS 288 then AS 329 at Seattle
Boston → Seattle → Anchorage
Timetable, Seattle time
20:17AS 288 from Boston at the gate
20:56AS 329 to Anchorage leaves the gate
39 min apart on the timetable
Seattle’s board gives a departure time for only about 57% of its flights, so many days show no gate time.
The last days
AS 288 and AS 329 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.