At the request of the Federal Aviation Administration (FAA), the Transportation Research Board of the National Research Council assembled an expert committee to provide advice on alternative strategies that might be adopted to meet long-term airport capacity needs. The committee was charged with four tasks: (1) to examine long-term airport capacity needs and measures to meet these needs; (2) to formulate alternative strategies reflecting varying assumptions about the growth of air traffic and intercity travel demand, technological development, government roles, and institutional arrangements; (3) to identify the advantages and disadvantages of these strategies; and (4) to recommend strategies for further analysis and evaluation by FAA. This report presents the committee's findings.