Iberia is offering gift cards with up to 15% off.
Gift cards are valid for flights operated by Iberia, Iberia Express and Air Nostrum.
You can use those gift cards for someone else or yourself, which means you can get up to 15% off for your flight ticket.
You can buy the gift cards until June 21, and they are valid until June 15, 2022.
Access promotion here.
Flight review: Iberia Business class Miami to Madrid A330-300