Abu Dhabi, UNITED ARAB EMIRATES – Global Loyalty Company (GLC), the specialist loyalty business of Etihad Airways Group, today announced that it had passed the milestone of 20 million members across its four airline frequent flyer programmes: Etihad Guest (used by Etihad Airways, Air Serbia, Air Seychelles and Etihad Regional), JetPrivilege (Jet Airways), MilleMiglia (Alitalia), and topbonus (airberlin and NIKI).