In 1992, Frangoulis moved to The United States to continue his operatic studies. With his mentor's Marilyn Horne, suggestion and with the help of the Onassis Scholarship, he completed a three-year long program of vocal courses at the Juilliard School of Music, in New York City as well as studying with soprano Dodi Protero. In 1992, Frangoulis also traveled to Liverpool, where he performed in an Opera Gala celebrating the 500th anniversary of the discovery of America, hosted by Sir Peter Ustinov. Appearing artists for this event were as well: Montserrat Caballé, Dmitri Hvorostowski, Julia Migenes-Johnson, Dennis O'Neil, Rita Hunter and the late Alfredo Kraus, with the Royal Liverpool Philharmonic Orchestra and chorus conducted by Robin Stapleton, in the presence of His Majesty Juan Carlos of Spain and HM Queen Sophia, and HRH Prince Andrew of England.