Flight General Edward Lawrence Logan International Airport departs from Boston General Edward Lawrence Logan International Airport at 11:25 and arrives at San Juan Luis Munoz Marin International Airport at 15:25.
The flighttime is about 3h 00m. The distance travelled ("as the bird flies"): 1112 Km. So the average speed is roughly 371 Km.
There is an 1 hour time difference between Boston and San Juan