Iberia is the flag carrier of Spain serving over 120 destinations with its fleet of more than 300 planes. Headquartered in Madrid (MAD), it connects the vast majority of countries to the capital city. This Oneworld airline is owned by International Airlines Group (IAG) which also owns British Airways, Vueling, and Aer Lingus. In this guide, we'll show you how to earn Avios in the Iberia Club frequent flyer program so you can book award travel, request upgrades, and much more.