There is a three hour difference between Los Angeles and Boston.This is because Boston is in the eastern time zone and Los Angeles is in the western time zone.For an example, It is 12:00 P.M. Noon at Boston then it would be 9:00 A.M. Morning at Los Angeles.
The time difference between Los Angels and Boston is 3 hours. Los Angeles is 3 hours ahead of Boston. Suppose if it is 10:43 AM in Los Angeles then it would be 1:43 PM in Boston.