AS 279 then AA 2632 at Boston
Seattle → Boston → Philadelphia
Timetable, Boston time
17:17AS 279 from Seattle at the gate
17:30AA 2632 to Philadelphia leaves the gate
13 min apart on the timetable
The last days
AS 279 and AA 2632 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.