Quantum Air (formerly known as AeBal, Aerolíneas de Baleares) was an airline based in Madrid, Spain. It operated domestic scheduled services within Spain, as well as charter and ACMI operations all over Europe. Its fleet was originally wet-leased to Spanair for use on domestic and international routes, but since 14 September 2008, they operated on their own. The fleet was originally wet-leased to Spanair for use on domestic and international routes until 14 September 2008.
AeBal was established in 1999 with headquarters in Son Sant Joan Airport, Palma de Mallorca. Originally it should have been named "AB Bluestar" but the name was changed to AeBal, Aerolíneas de Baleares. the company started operations on 5 July 2000 from Madrid with domestic services and an initial fleet of three Boeing 717 aircraft. It was owned by Grupo Marsans (51%), SAS Group (25%), Spanair (18%) and VITRAC (6%). The company operated under the name AeBal-Spanair Link, retaining much of its Spanair pedigree in the livery. It had 155 employees in March 2007. A number of changes in the shareholding structure of the company ended up with SAS Group owning 100% of the company.