Ortiz de Landázuri left her Madrid home to check into the Clínica Universidad de Navarra where she was operated on 1 July. Though the surgery was successful, she developed a sudden failure in respiration which caused her death on 16 July at 6:30am; her mother died in the same clinic the next week on 23 July. Ortiz de Landázuri's remains were buried in Pamplona where she had died but were later transferred to Madrid on 5 October 2018. In 2001 the Opus Dei prelate Javier Echevarría Rodríguez started the steps needed to launch the beatification process. The forum for the diocesan process for the cause was transferred on 30 March 2001 from the Pamplona-Tudela diocese to the Madrid archdiocese at which point the Congregation for the Causes of Saints on 3 November issued the "nihil obstat" (no objections) edit to begin the cause and to title her as a Servant of God. Cardinal Antonio María Rouco Varela opened the diocesan process on 18 November and later closed it on 18 March 2005. From 2002 to 2003 there were 66 sessions held with 32 witnesses from Madrid being called to provide evidence and interrogatories while another week-long session in mid-2003 in Mexico saw 22 witnesses giving evidence in support of Ortiz de Landázuri's virtues in 37 sessions. The C.C.S. later received all the documents gathered during that process in 2005 (3008 pages in seven compiled volumes) and validated the process later on 17 February 2006. The postulation later compiled and submitted the Positio dossier to the C.C.S. in 2009 for evaluation. Theologians provided a positive vote to the cause on 7 June 2016 after having assessed the Positio's contents while the C.C.S. also provided their assent to the cause at their meeting held on 2 May 2017. Pope Francis titled Ortiz de Landázuri as Venerable on 4 May after determining that she had lived a model Christian life of heroic virtue. Ortiz de Landázuri's beatification depended upon the confirmation of a singular miracle attributed to her intercession; it had to be a healing that science could not be able to explain. There was such a case that was reported in Barcelona and which a diocesan process that Cardinal Lluís Martínez Sistach presided over from 25 May 2007 until 16 January 2008 investigated.