Open air

Open air, open-air or openair may refer to:
 * Open Air, a BBC television program
 * Open-air cinema or outdoor cinema
 * Open-air concert, a concert taking place outside
 * Open-air museum, a distinct type of museum exhibiting its collections out-of-doors
 * Open-air preaching, the act of publicly proclaiming a religious message
 * Open-air treatment, therapeutic exposure to fresh air and sunshine
 * Open air school, an outdoor school designed to combat the spread of disease
 * OpenAIR, a message routing and communication protocol for artificial intelligence systems
 * Openair Cinemas, an Australasian brand of outdoor cinema events, owned by Pedestrian (company)