Boston Logan Airport wait times are very good. In some recent surveys, it ranked near the top for shortest security wait times. To be safe it's worth checking with your airline but the rule of thumb should be arrive 3 hours before an international flight and 2 hours before a domestic flight.
Check above for the Logan TSA wait times estimates for today as well as to see the PreCheck locations and lane openings. TSA PreCheck membership can help you get through security faster at Boston Logan Airport. To find out more about joining or renewing TSA PreCheck membership visit https://www.tsa.gov/precheck. CLEAR is also available at BOS.
We don't have much information about security wait times at Logan for those passing through immigration although we would not expect significant delays, in keeping with the efficiency of departure security at the airport. For those who are arriving via another connecting airport in the US you should expect to be processed quickly.