In view of the severe constraints on its length, the scope of the paper will instead be
confined to a selected subset of air transport-related topics, where operations research has made some of its most significant contributions to date. Examples of important topics that are either not covered at all or are touched on peripherally include: aviation safety and security, airline fleet planning, airline staffing, airline maintenance planning, aircraft loading, and decision support tools for the management of airport operations (e.g., gate assignments).