The crossword clue possible answer is. The washington county airport (kafj) is a dynamic economic engine and regional aviation asset in southwestern pennsylvania. Iad) serves the unites states nation's capital area with domestic,. Washington airport was the second major airport to serve the city of washington, d.c., in the united states. , washington dulles is only one of fourteen airports in the united states that sees daily operations from, and/or has at least one gate and one runway to accommodate an airbus a380;