Bill_S said:
Pre Check helps you get through security and INTO the gate areas quicker and with fewer hassles upon departure...both domestic and international.
Global Entry helps get you through Customs and Imigration and out of the airport quicker and with fewer hassles upon arrival...from international travel.
Similar, but Distinct...
TSA pre is for domestic flights or going through a domestic airport departing or arriving from a foreign country at the domestic airport. Doesn't help in a Foreign airport such as SXM on departure.
