Flight Luis Munoz Marin International Airport departs from San Juan Luis Munoz Marin International Airport at 20:10 and arrives at Boston General Edward Lawrence Logan International Airport at 00:15.
The flighttime is about 5h 05m. The distance travelled ("as the bird flies"): 1112 Km. So the average speed is roughly 219 Km.
There is an 1 hour time difference between San Juan and Boston