LagunAir Líneas Aéreas, usually referred to simply as LagunAir, was an airline based in León, Spain. It operated scheduled domestic passenger services to 19 destinations on the Spanish mainland, and to Minorca, Majorca, and Ibiza. Its main base was León Airport and it maintained focus city operations at Valladolid Airport and Salamanca Airport, connecting the Castile and León regions with major Spanish destinations.

Initially owned by the León Airport Consortium the company began to operate on September 29, 2003 with a flight from León to Barcelona's El Prat airport. LagunAir stopped operating on 31 January 2005, allegedly due to excessive technical difficulties to operate from León Airport and the mismanagement of the latter by Aena. In February 2005 it was subsequently bought and relaunched by AGELCO Group, acronym for Agrupación de Empresarios Leoneses de la Construcción, a local Leonese investor group. The company and the investors have received extensive local government support. The company resumed operations on 1 March 2005.

The new ownership re-oriented the firm and set up a long-term strategy aimed at becoming the leading regional airline in Castilla and León. Electronic ticketing was introduced in May 2005 and the company reached several agreements with major Spanish tour operators. The strategic expansion plan includes increasing the company's capital to 14 million euros in order to renew the current SAAB turboprop fleet with longer-range Embraer jet aircraft and setting up focus city operations at the other major Castilla and León airports, beginning with Valladolid Airport and Salamanca Airport.

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