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 Oneworld, an airline alliance, founded on which date?
Air Nostrum:  Iberia Regional franchise is a regional partner of Iberia and an affiliate member of the Oneworld airline alliance. Oneworld: Oneworld (marketed as oneworld; CRS: *O) is an airline alliance founded on 1 February 1999.
1 February 1999