This proceedings, ""Airport Facilities: Innovations for the Next Century"", contains papers presented at the 25th International Air Transportation Conference held in Austin, Texas, June 14-17, 1998. The main theme of these papers concerns airport planning and engineering for the next century. Within this theme, the proceedings covers such topics as: emerging issues and methods of planning for them; conversion of military bases to commercial airports; airport development plans; pavement materials; pavement design and analysis; and pavement construction and rehabilitation. The papers within this proceedings, written by airport officials, consultants, and academicians, provide a thought-provoking and useful collection for taking air transportation into the next century.