Williams has performed around the world, including: St. Sulpice and Notre Dame, Paris; Walt Disney Concert Hall, Los Angeles; Westminster Abbey; St Paul's Cathedral; King's College, Cambridge; The Queen's College, Oxford; Salisbury Cathedral; Blenheim Palace; Woolsey Hall, Yale University; Memorial Chapel, Harvard University; St. Patrick's Cathedral, New York; Washington National Cathedral; St. Ignatius Loyola, New York; Riverside Church, New York. She has also given numerous concerts in Sweden, Finland, Estonia, Monaco, Luxembourg, the Netherlands, Poland, Germany, Denmark, Singapore, China and Russia.