The worst airline ever. I am trying to use a voucher that I received from a cancellation for over three months. Every time it gives me an error. I filed a claim with Iberia and they don't respond to emails. The last email I received it said to contact customer service. I have called customer service for the past month, spoke to supervisors. They claimed to escalate the claim and nothing yet. In the meantime I am in need to use the voucher for a new booking in December and the flight keeps going higher in price.
DON'T FLIGHT IBERIA !! THE WORST CUSTOMER SERVICE YOU WILL EXPERIENCE.

They are the worst Airline I have ever taken. They lost my sons bag supposedly, but when it appeared at the hotel it was covered with oil/sticky substance. Probably the real reason it wasn't on the baggage carousel. They just wouldn't tell the truth. They then insisted it was rapped for the return flight as it was in this state. At a cost of 10 euros which they then refused to refund as it wasn't necessary. They have refused any responsibility for the damage.

I have booked a flight it has confirmed reservation charged money but didn't give me a ticket, after sometime I checked and called they CS agent said that booking is good to go and will resend me tickets1h later no tickets confirmation doesn't show my booking confirmed anymore
calling to airline again
1st they said changeble but flight will be with additional stopover
fine I confirmed it already spent a lot of time just wanted to get it done
2nd they said sorry not possible we can try to refund your money
Well even 10h wasn't passed since they have charged money technically void window still active refund should be quick
3rd they are saying that they will submit the case won't give a confirmation about refund and no guarantees I said that it won't work with us
4th their supervisor Caroline was interrupting and wasn't letting me finish sentences
0.00 out of 10
no respect or support from their agents and for a moment I have booked business class tickets paid $3.7k and those guys doesn't care how to treat you

We have dubbed Iberia the official airline of the Spanish Inquisition! Although they are partners with major carriers such as BA and American, they do not play by the rules of their own game. Most flights to places inside Spain from other EU countries or from other more distant places must pass through Madrid Airport. Madrid Airport is very large and far more complicated than their website suggests. Furthermore, most employees you will encounter for help with directions and procedures do not speak anything except Spanish. And...they are working as third party outside contractors to Iberia, not the airline itself. Iberia picks certain flights for certain destination connections. You cannot change them easily when you book. Nor can even top travel agencies such as American Express.

We had booked and paid in advance for a round trip from London to Seville through Amex. Iberia gave a connection time of under two hours. This sounds okay except our flight was very late in take off and arrival do to nothing we could see. the airport was chaos unlike what Iberia had told us at Heathrow. We had just 40 miniutes to go through passport control, security, and take a 13 minute train ride to a distant terminal. We arrived just as the final people were loading and were refused embarkation. Amex could not rebook us because we were in Iberia's control. the rebooking agent listed us as no shows. Did not even offer us anything but standby on a local budget airline even though we later learned that there was an empty Iberia express to Seville leaving in less than 90 minutes. We lerned that by wandering around until we found the only Iberia true help desk. Had to buy biz class walk up seats for nearly $800 each for a 50 minute flight. Getting back took so much time that we lost nearly a day of exploring Southern Spain. Our Spanish staff said never to use Iberia---use the train system or easyjet.

I booked my flights with Iberia from Zagreb to Montevideo, and back from Lima to Zagreb, three legs in economy class (Zagreb - Madrid, Madrid - Montevideo, and back Madrid -Zagreb), and for a long inbound flight Lima - Madrid, I booked premium economy, and paid the appropriate price. It was done well in advance, 5 months before the flights. Just a week after the booking, IBERIA informed me that there are no places available in premium economy on my inbound flight Lima - Madrid, and that I was hence downgraded to economy. All my attempts to communicate with IBERIA and find a solution with which I would be reasonably happly failed. Online contact is practically impossible, so I tried at the Madrid and Lima airport, where they just had a one and only "solution" - fly and after all your flights have been accomplished, write to us to see about the possible refund.
24 hrs before my inbound flight, IBERIA informed me ( and probably other passengers as well) that they are experiencing problems with the inflight entertainment system so it would not work probably on the flight, and they gave us a motherly advice to download our own entertainment. The system indeed didn't work on the entire flight. There was no wifi either. At the flight Madrid - Zagreb (2.5 hrs) they charge passengers for everything, there is no even a glass of water offered for free.
I would suggest my fellow passengers, if there is any other option, avoid IBERIA, this was by far my worst experience ever.