Over the next several decades, airports must confront diverse challenges that span factors such as operations, environmental sustainability, and integration with broader intercity and local transportation networks. Furthermore, airports must confront these challenges within the context of their local communities; airports are expected to be economic engines, good neighbors, and resilient in response to natural or man-made disasters. ACRP Research Report 271: Envisioning the Future of U.S. Airports, from TRB's Airport Cooperative Research Program, is based on a visioning exercise conducted with a wide variety of airport stakeholders and identifies potential future outcomes and the issues and challenges that will need to be addressed to achieve the desired future.