Air Nostrum, Líneas Aéreas del Mediterráneo, S.A., also known as Iberia Regional, is a regional airline based in Valencia, Spain. Iberia Regional franchise is a regional partner of Iberia and an affiliate member of the Oneworld airline alliance. Air Nostrum operates an extensive network of 91 domestic and international routes to 51 destinations, as well as charter flights. Its main base is Valencia Airport, with hubs at Barcelona Airport and Madrid-Barajas Airport.
The airline was established on 23 May 1994 and started operations on December 15. It was founded as Líneas Aéreas del Mediterraneo/Air Nostrum in Valencia. In May 1997, Air Nostrum signed an agreement with Iberia to become an Iberia franchise. It acquired Iberia subsidiary Binter Mediterraneo and absorbed its operations. Following Iberia's merger with Aviaco in 1999 additional domestic and international services were taken over by Air Nostrum. It acquired Dutch airline Denim Air in 1999, but disposed of any interest in the company in 2002.

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