Aeroenlaces Nacionales S.A. de C.V. trading as Viva Aerobus launched its first service in Nov-2006. The Mexican ultra low cost carrier operates from its main base at Monterrey Escobedo International Airport providing domestic services to Mexican Tier I cities and leisure destinations as well as to the US. The carrier also operates to other smaller regional centres. Viva Aerobus was formed as a result of a strategic alliance between Grupo IAMSA, one of Mexico’s leading bus transportation providers and Irelandia Aviation, the investment vehicle of the Ryan family-founders of Ryanair. Grupo IAMSA secured Irelandia's 49% stake in Viva Aerobus in 2016. Irelandia, formerly a minority stake holder in Viva Aerobus, involved in starting sister carrier, VivaColombia (now Viva), with both carriers forming part of multinational airline group; Grupo Viva. The airline concluded its fleet modernisation plan, phasing out its last Boeing 737-300 on 28-Oct-2016 and transitioned to an all A320 fleet.