Yes, Iberia Airlines allows travelers to hold their fare for a limited time through its pre-booking service. However, this service is available for some of the selected routes of the airlines. With the Iberia Holding Confirmed service, passengers can hold a booking up to 72 hours by just paying $12 for long-haul flights and $6 for short-haul flights. For further insights on this, visit the official website of Iberia Airlines or check out the blog linked above.