Iberia Plus is now offering double Avios for flights flown between July 24 and December 31, 2014, that are booked between July 24 and August 31 on Iberia.com.
The offer is valid for flights on Iberia, Iberia Regional Air Nostrum.
You can access this offer on Iberia’s website here.
This offer is valid for all flights except the flights under the following flight numbers: IB7xxx, IB5xxx, IB4xxx, IB36XX, IB39XX.
There are no terms and conditions attached to this offer and no registration seems to be requried.
This is a nice double Avios offer if you can plan your flights for rest of the year during the booking window.