If you have a ticket in Economy class (fare Y, B or H) for a direct flight by the Iberia Group* (Iberia, Iberia Express and Iberia Regional/Air Nostrum) and want to change it to Premium Economy or Business, you can purchase an Upgrade with your Avios to travel in a higher cabin class. This service is subject to availability.
*Except Air Shuttle flights and flights operated by other airlines.