EC-MCS is an Airbus A320 version 200 which Iberia got as new in August 2014. It carries the name Playa De Los Lances. It is a leased machine.
Picture from Helsinki Vantaa airport 3.4.2018 by Ilkka Siissalo.

Iberia Express is a Spanish low-cost airline owned by Iberia, which operates short- and medium-haul routes from its parent airline's hub at Adolfo Suárez Madrid–Barajas Airport, providing feeder flights onto Iberia's long-haul network.

EC-JEJ is an Airbus A321 version 200 which Iberia got as new in 2005. It was transferred to Iberia Express in February 2016.
Picture from Trondheim Værnes airport 8.6.2019 by Ilkka Siissalo.

Another picture of the same EC-JEJ.
Picture from Trondheim Værnes airport 8.6.2019 by Ilkka Siissalo.

EC-LUC is an Airbus A320 of Iberia Express. It is from the year 1999.
Picture from Málaga airport 11.11.2019 by Ilkka Siissalo.