DC-9-33CFs were ordered; these four aircraft were handed over to the company within a month, with the first of them entering the fleet in , and the last in . Valued at million, four more DC-9-30s were acquired in 1978. That year, Aviaco lost almost ESP 453 million. Another loss, equivalent to £3 million, was recorded for 1979, but these financial results were reverted in 1980, with the airline making a £5.5 million profit. At , the company had more than employees and it was 90%-owned by INI. Early in the decade, Aviaco incorporated five DC-8-63s that were phased out from Iberia's mainline fleet due to a renewal programme. Flight International informed in 1983 that the company had an initial order for 20 CN-235s, and that the order was boosted to 22 aircraft of the type late that year. By , the number of employees had grown to 1,751; the fleet comprised two DC-8-50Fs, 16 DC-9-30s, four DC-9-30Fs and nine Fokker F27-600s; the 22 CN-235s were still on order. During the decade, most of Aviaco shares were acquired by its competitor Iberia. From that time, Aviaco ran the less important domestic routes while Iberia served the international destinations and the most important national routes, such as the shuttle service Madrid-Barcelona. All the Aviaco technical, marketing and financial resources were transferred to Iberia. During this time, Aviaco had a fleet of Douglas DC-9 planes, which were painted in blue and white livery. During the 1990s, the Asturias–London Stansted, Valladolid–Paris, Zaragoza–London Stansted and Zaragoza–Paris routes were added to the existing ones radiating from Madrid and serving Almeria, Badajoz, Barcelona, Bilbao, Fuerteventura, Granada, Ibiza, Jerez, La Coruña, Lanzarote, Las Palmas, Málaga, Mallorca, Menorca, Murcia, Oviedo, Palma, Pamplona, Reus, San Sebastian, Santander, Seville, Tenerife, Valencia, Valladolid, Vigo, Vitoria and Zaragoza. At , Aviaco had 1,696 employees and a fleet of eight Fokker F-27s, 20 McDonnell Douglas DC-9s and 13 MD-88s. Iberia's shareholding in Aviaco was boosted from 33% to 100% in 1998, when the Spanish flag carrier took control of 67% of the shares that were held by the SEPI. Since then, Iberia plans for Aviaco were to absorb it; this occurred on . During its heyday, Aviaco ("AO") was well known for operating charter flights primarily from Palma, Tenerife and Girona to almost every provincial airport in Europe, providing uplift for all major tour operators, such as Thomson, Enterprise, Cosmos and ILG. In